TW200407049A - Organic light-emitting device and fabrication method thereof - Google Patents

Abstract

The present invention relates to a light-emitting device, and especially relates to an organic light-emitting device with three wavelengths having white-light characteristics. The device comprises a hole transport layer, an electron blocking layer, a first host layer, a second host layer, a third host layer, a hole blocking layer and an electron transport layer between the anode and cathode sequentially. The first host layer has a first guest material mixed inside, which can project the first color light (R) under the external bias voltage. The second host layer has a second guest material mixed inside, which can project the second color light (B) relatively. The third host layer has a third guest material mixed inside, which can project the second color light (G) relatively. Therefore, by using the combination of three primaries (red, blue, green), a continuous full-band, full-color light source having three-wavelength characteristics can be obtained directly.

Description

200407049

[Technical field to which the invention belongs] ^ The present invention relates to a light-emitting device, and more particularly to an organic electro-optical light-emitting device having three-wavelength white light emission characteristics and a manufacturing method thereof. [Previous Technology] • Organic Light Emitting Device (OLED) has been developed by Kodak's c · w. Tang and § · Α · yarn since 1987.

eVacuum evaporation method is used to deposit hole-transporting materials and electron-transporting materials such as Alq3 'on transparent IT0 glass, and then vaporize a metal electrode to form a self-luminous, high response speed, weight Light = thin organic light emitting element (0LED) with thin thickness, low power consumption, wide viewing angle, high brightness and full color. Since then, organic electro-optical light-emitting elements have been regarded as the star products of displays. Everyone hopes that they can be used in full-color displays or project white light sources as soon as possible to achieve true environmental protection and power saving effects. The ideal state of lighting. Please refer to FIG. 1 ', which is a cross-sectional view of a conventional 0LED structure. This structure is disclosed in US Patent No. 4, '76 9, 2 92, 1988, issued by Kodak Company in the United States.

"ELECTROLUMINESCENT DEVICE WITH M0DIFIE"

"D THIN FILM LUMINESCENT ZONE" patent; the organic electroluminescence device (OLED) IO is mainly deposited on a transparent substrate η to form a transparent conductive anode (IT0) 13, and the ITO anode 13 A hole-transport layer (HTL) 15, a light-emitting layer (EML) 17 and a metal cathode ^ are sequentially formed on the top, and a doping-fluorescent substance (not shown) is doped in the light-emitting layer 17. When the anode 1 When the 3 and cathode 19 are subjected to an external bias, the hole will be able to be switched from ττ ^

200407049 V. Description of the invention (2) The electrode 13 is transmitted to the light-emitting layer 15 through the hole-transporting layer 15, and the electrons are also relatively transferred from the cathode 19 to the light-emitting layer 17. The electrons and holes in the light-emitting layer 17 will be caused by Furthermore, the cooperative action (RecOmbination) produces excimer molecules n, >). When the excitatory molecules release energy and return to the ground state, they can emit light in the light emitting layer 17 by themselves, or re-excitation doping. Miscellaneous fluorescent substances are excited and project a set range of wavelength light sources. First, although the above-mentioned first conventional LED structure and technology can achieve the effect of projecting a light source, it can only project a monochromatic light source and cannot reach the ultimate goal of projecting a white light source or full color.

See Figure 2 for an example of the energy performance of another conventional 0LED. This structure is disclosed in the US Patent Application No. 196 in 1996. "RGANIC electroluminescent device with emission from hole TRANSPORTING LAYER "patent; this technology is mainly in addition to! Ding Yang, 22, in addition to the electron transport layer (ETL) 24 and the cathode 25, a hole transport layer (HTL) 23 between the anode 22 and the electron transport layer 24 is included. The choice of the material of the transmission layer 23 causes the energy step difference (EC1—EC2) between the valence band of the electron transmission layer 24 and the hole transport layer 23 to be smaller than the energy step difference (EV1_EV2) between the conduction bands between the two. In the future, the number of electrons transmitted to the hole transmission layer 23 in the electric-sub-transmission layer 24 will far exceed the number of holes transmitted to the electron transmission layer 24 in the opposite direction, so the recombination of electrons and holes and the location of the projection light source will occur.于 电 孔 输 层 23。 In the hole transmission layer 23. In addition, in order to facilitate the transmission of the hole from the anode 22 and inject it into the hole transmission layer 23, this patent also discloses a hole provided between the anode 22 and the hole transmission layer 23. Page 6 200407049 V. Description of the invention (3) Injection layer. Although the above-mentioned Motorola patent technology order, it is possible to leave the residential hole in the hole transmission layer 23 and re-junction with the electron ::: Faster 咼 Luminous efficiency 't 隹 It can also only project a monochromatic light source, and the same 'Helmet: J to the ultimate goal of projecting a white light source or full color. ,,,, Fada, reached 0LED can be used as the ultimate source of white light source and full-color, = Mo: Ge seeking various technical solutions, the main can currently be reached: Zhengguo's solutions include the following three: Less 1. Color ConVe (rSi〇n): It mainly uses blue light as the emission source, and then excites this blue light into a conversion film to obtain three primary colors of red, green and blue (RGB) visible light, and = to achieve this The purpose of full color or projection of a white light source; cloth light = = Not only the light color purity and efficiency of the light color conversion film is not very satisfactory, but because the color conversion material will absorb ambient light (or ultraviolet light ^ will Potential contrast and pixel problems. 2. Color filter method (c0l0rFilter): Use a white organic electro-active material as a backlight source, and use a color filter that has been used in MD to meet expectations. To achieve the effect of full color ;, of course, the key point of this technology is how to obtain a white light source, and whether the white-color light source is a full-band continuous light source and how to improve the luminous effect are the technical priorities that must be broken before the product is mass-produced . 3 · Red and Blue Independent three-color light emitting method: RGB primary colors emission is mainly alone, it is desirable to achieve the most direct effect full color, or a white light source so as to be then with 7200407049 page.

But one, one sip, said no reward, its color balance is better than lamb, the requirement of day fineness also increases the difficulty of the process, and the three organic materials that do not emit light independently emit light. „^ Chiyou ’s efficiency, service life, and ease of control are also different, such as red light Mae Za, ^ ^ dagger 710, it is difficult to reach the realm of pure red, and it is biased to orange-red 'its life is relatively short. Summary of the Invention] Therefore, how to propose a solution to the ultimate goal of the best full-color light source in light of the above problems and shortcomings is the main purpose of the present invention, and it can be easily achieved by white light or three-wavelength light sources. For the secondary purpose of the present invention, 'the method that can effectively solve the problems that have occurred for a long time in the production of organic electro-excitation light devices' can be achieved with a three-wavelength projection light source square knife cloth' and easily complete white light or full color. The electromechanical excitation light device emits light in order to obtain the ultimate light and color separation. The ultimate product requirement is to provide an organic electrical excitation light device as a white light source or a full-color product. Another object of the disadvantager is to provide an organic electroluminescent device; θ: Γ: ί the combination of the host material layer and the guest luminous substance in order to effectively reduce the light efficiency and service life. 2 Purpose, therefore, in a preferred embodiment of the present invention, its main structure includes:-a first conductive layer having a first conductivity type 2: a first host material layer on the upper side of the conductive layer, Internally mixed with each luminous substance, it can project a 200407049 under an external bias.

V. Description of the invention (5) One-color light source; a second host material provided on the upper side of the first host material layer, and a second guest luminous substance mixed therein, which can be biased; a second color is projected A light source; a host material layer provided on the upper side of the second host material layer, and a third guest luminous substance mixed therein, which can not project a light source of a third color under a bias effect; and a second-type conductive material The second conductive layer is disposed on the upper side of the third host material layer. [Implementation] In order to make your reviewers have a better understanding of this effect and cooperate with a detailed description, the explanation is as follows: The structural features of the invention and the achievement, please refer to the preferred embodiment diagram and _, first ' Please refer to FIG. 3 for a structural cross-sectional view of a preferred embodiment of the present invention; as shown in the figure, the organic electro-optical light emitting device 30 of the present invention is mainly formed on the upper side of a transparent substrate 31 by evaporation or Sputtering or the like to form a second conductive layer 33 (such as an anode), and a hole transport layer 35 (HTL ·, first carrier transport layer) and a barrier Electron Barrier Layer 47 «(electron Mc) cking laye

A first host material layer 41 (Host 1), a second host material layer 42 (Hos 2), and a third host material layer 43 (Host 3) are sequentially formed on the upper side of the electron blocking layer 47. A hole blocking layer 45 (hole blocking laYer), an electron transporting layer 37 (ETL; second carrier transporting layer), and a cathode 39 are sequentially formed on the upper side of the third main material layer 43 to block the advance of the holes. Layer 47 can block electrons from cathode 39 on

200407049

On the upper side of the hole transport layer 3 5, in other words, 3 (43), Host 2 (42), and H0st 1 (two: the electrons are limited to the host barrier layer 45, and the anode 33 can be obtained from two anodes = two, By the bottom side of the hole, in other words ... is the same as the hole =

Host 2 (42) and Host 3 (43). Since most of the j (41) and Γ skin "ΐ are restricted to Host 1, Host 2 " Fan :: Electricity =; combined action 'borrow ... effectively improve each host material layer'; in the first host material layer 41) Second, the luminous object matter (the second guest layer corresponding to Guest 1 is also mixed in 3 3) 3) When these guest light emitting materials and phosphorescent materials are combined, they receive an excited light source, such as blue light (β) projected here The RGB three-wavelength band is provided with a phase substance substance or a molecule of the two. In the embodiment 5 and the Gues three primary colors, the inner hybrid (mi X i ng) has a first guest light emitting host material layer 4 and the i is also mixed with an i. (Guest 2), and the third guest luminous substance corresponding to the third host can be selected as a corresponding matching mixture, which can be released in the amount of electron holes to project the corresponding, and Guest 1 can project red light (R ) t 3 projects green light (G) 'so that a full-band continuous light is combined

Body materials (Guest's fluorescent pairing and re-knotting 5 Gues can be white light source or full-color products, which not only has a relatively simple manufacturing process, but also can effectively increase luminous efficiency.

Of course, for the ideal CIE chromaticity chart system specifications of white light or full color, the concentration of green light is slightly increased relative to red and blue light. Therefore, in this embodiment, the concentration of Guest 3 that can project green light is relatively At Guest 1 and

Page 10 200407049 V. Description of Invention (7)

The concentration of Guest 2 must also be relatively high, and the number of electron hole pairs in |} ost 3 can also be designed to be larger than Host 1 and 110, and Host 1 and Host 2 and Host 3 The arrangement of positions depends on the relative matching of their energy levels.

Furthermore, please refer to FIG. 4, which is a structural cross-sectional view of another embodiment of the present invention. As shown in the figure, in this embodiment, it is mainly a light-transmitting substrate made of glass, quartz, or plastic. 3 丨 A vapor-deposition or sputtering method is used to form an indium-tin oxide (IT0), polybenzylamine (PANI), zinc oxide (ZnOx), molybdenum oxide (Mo0x), vanadium oxide (ν〇χ), and oxidation. An anode 33 composed of a metal, alloy, compound, or mixture having a light-transmitting conductive effect such as ruthenium (Ru0x), Au, Cul, Sn02, or ZnO. Successively, the top surface of IT033 was formed according to performance-a hole injection layer (hi L) 53 composed of M-MTD ΑΤΑ, a hole transmission layer (htl) 35 composed of NPB, and a LiF composed Electron blocking layer 47, first host material layer 41 made of NPB, second host material layer 42 made of third base material, third host material layer 43 made of Alq3, hole barrier layer 45 made of BCP , An electron transport layer (ETL) 37 composed of A1 (1), an electron injection layer (eil) 57 composed of LiF, and

A cathode 39 made of a conductive material such as Au, Al, Mg, Pt, Ag, MgAg, AlLi, AlLiO, AlLiF, or Ca. ~

Among them, the NPB of the first host material layer 41 is mixed with at least one DCM2 substance capable of projecting red light, the DPVBi of the second host material layer 42 is mixed with at least one DSA substance capable of projecting blue light, and the third The Alq3 of the host material layer 43 is mixed with at least one thorium substance capable of projecting green light. By the arrangement of the energy level positions of the host material layers (Hosts) described above,

Page 11 200407049 V. Description of the invention (8) Electron hole pairs in the range of Nρβ 41, DPVBi 42 and Alq3 43 will be generally distributed among the hole blocking layers 45 and 47. The host material layers 4 1 to 4 3. When an external bias is applied, red, blue, and green primary light sources can be projected through each guest luminous substance (Guest), forming a complete three-wavelength projection light source system, which can easily achieve full-wavelength White light source or full color product. In order to integrate the light source, such as white light, it has more in line with the specifications of the ideal C and E chromaticity diagram system. The concentration of C6 can be higher than that of DSA and DCM2, or the thickness of Alq3 43 can be greater than the thickness of DPVBi 42, nPB 41. Thickness Of course, in the above embodiments of the present invention, the materials selected for each layer can have a variety of changes. The material substances disclosed in the following patents can also be applied for reference: For example, the materials of the ETL layer or HTL layer can refer to the US patent case. No. 5,29, No. 870, refer to U.S. Patent Nos. 5, 〇61,56g and 5,256,945 for HTL layer materials, and refer to U.S. Patent No. 4,539,507 for ETL layer materials. No. 5, 886, 464. For the material of the HIL layer, please refer to US Patent Nos. 3,9 35, 03 1 and 4, 356, 429. For the anode, please refer to US Patent No. 5, '7 73, 92. No., EIL layer material can refer to U.S. Patent No. 4, 案, 507. · In summary, the present invention relates to a light-emitting device, and more particularly to an organic electro-luminescent device having three-wavelength white light emission characteristics and a method for manufacturing the same. Full-band full-color light source. Therefore, the present invention is truly novel, progressive, and available for industrial use. It should meet the patent application requirements of China's Patent Law, and file an application for an invention patent in accordance with the law. I would like to grant it soon. 200407049

However, the above is only for the purpose of not limiting the scope of the present invention. The examples, and the shapes, structures, features, and spirits described in the examples, and 2: "patent patents" shall be included in this specification. Invention patent application park :. -、 'Crossing and modification [Comparison of drawing number]: 10 0LED 13 anode 17 light emitting layer 22 anode 24 electron transport layer 30 0LED 33 first conductive layer 37 carrier transport layer 41 first host material layer 43 third Host material layer 47 Diode carrier barrier layer 57 Diode carrier injection layer 11 Transparent substrate 15 Hole transport layer cathode 23 Hole transport layer 25 Cathode substrate 35 First carrier barrier layer 39 Second conductive layer 4 2 No. Two host material layers 45 first carrier blocking layer 53 first carrier injection layer

Page 13 200407049 Brief description of the drawings. Figure 1: A sectional view of the structure of a conventional organic electroluminescent device; Figure 2: A schematic diagram of the energy levels of components of another conventional organic electroluminescent device; Figure 3: The present invention A structural cross-sectional view of a preferred embodiment of an organic electroluminescent device, and FIG. 4 is a structural cross-sectional view of another embodiment of the present invention.

Page 14

Claims (1)

200407049 VI. Scope of patent application 1 · An organic electro-optical light-emitting device whose main structure includes at least: a first conductive layer having first-type conductivity; a first body material provided on the upper side of the first conductive layer Layer, a first guest luminous substance is mixed therein, and a first color light source can be projected under an external bias; a second host material layer is provided on the upper side of the first host material layer, and a The second guest luminous substance can project a second-color light source under the external bias; a third host material layer disposed on the upper side of the second host material layer, and a third guest luminous substance is mixed therein A third color light source can be projected under the effect of the applied bias; and a second conductive layer having a second type of conductivity is disposed on the upper side of the third main material layer. 2. A kind of organic electro-excitation light, its main structure includes at least: a first conductive layer having a first plastic conductivity; a second carrier blocking layer provided on the upper side of the first conductive layer; A first host material layer provided on the upper side of the second carrier blocking layer is mixed with a first guest luminous substance, which can project a first color light source under an external bias; < A second host material layer on the upper side of the first host material layer is mixed with a first guest luminous substance, which can be projected under the effect of the bias voltage. A one-color light source is provided on the second host material. A third host material layer on the upper side of the layer is mixed with a third guest luminous substance, which can be applied at the external bias voltage. Page 15 200407049 6. Scope of patent application A third-color light source is projected under use; and a second conductive layer with second-type conductivity is provided on the third body. 3. A kind of organic electro-optical excitation light device, its main structure includes at least: a first conductive layer having first-type conductivity; a first main material layer provided on the upper side of the first conductive layer, and mixed therein A first guest luminous substance is provided, which can project a first color light source under an external bias; / A second host material layer provided on the upper side of the first host material layer is mixed with a second guest luminous substance, which can project a second color light source under the external bias; / set on the second A third host material layer on the upper side of the host material layer is mixed with a third guest luminous substance, and a third color light source can be projected under the external bias; a first source on the third side of the third host material layer A carrier barrier layer; and / or a second conductive layer having a second type conductivity, which is disposed on the upper side of the first carrier barrier layer. ‘4 · An organic electro-optical light-emitting device, the main structure of which includes at least: 〆 a first conductive layer having the third plastic conductivity; / A second carrier blocking layer provided on the upper side of the first conductive layer; a first host material layer provided on the upper side of the second carrier blocking layer, a first guest light emitting substance mixed therein, A first color light source is projected under the action of an external bias; / a second main body material layer provided on the upper side of the first main body material layer, inside Page 16 200407049 A second light source can be projected under the external bias to mix with a second guest luminous substance; a third host material sound provided on the upper side of the second host material layer, and a hybrid-a third guest The luminous material can be applied to the light source; a third-color light source is projected under pressure; a first carrier blocking layer provided on the upper side of the third host material layer; and a second conductive layer having a second type of conductivity Is disposed on the upper side of the first carrier blocking layer. • The organic electroluminescent device described in item 4 of the patent application, wherein the first host material layer is an NPB layer, the second host material layer is a DPVBi layer, and the third emitter layer is an Alq3 layer. . • The organic electroluminescence device described in item 4 of the scope of the patent application, in which the host material layer is an NPB layer, and the first guest substance is a DCM2. 7. The organic electroluminescent device according to item 4 of the scope of patent application, wherein the second host material layer is a layer and the second guest light emitting substance is a DSA. 8. The organic electroluminescent device according to item 4 of the scope of the patent application, wherein the second host material layer is an A1 q 3 layer, and the third guest light emitting substance is _C6. 9) The organic electro-optical device described in item 4 of the patent scope, wherein The concentration of the second guest luminous body is greater than the respective concentrations of the one guest luminous body and the second guest luminous body. 10 The organic electroluminescent device as described in item 4 of the patent scope Page 17 200407049 The H first guest luminous substance is one of a glorious substance and a combination thereof. Xi Niu You Wu Bei 11 12 t! Ϊ́ The organic electroluminescence light device described in item 4 of the patent scope, a; The second luminous substance is one of the light-emitting substance, the phosphorescent substance, and a combination thereof . The organic electro-excitation light set as described in item 4 of the "Patent Range", in which the second guest luminous substance is one of a fluorescent substance ^ and a combination thereof. Xi Niu Jiu Wu Bei 13. An organic electro-optical light-emitting device, the main structure of which includes at least: a first conductive layer having first conductivity; a first & sub-transport layer provided on the upper side of the first conductive layer; A second carrier blocking layer provided on the upper side of the first carrier transporting layer; a first host material layer provided on the upper side of the second carrier blocking layer; A first color light source is projected under the action of an external bias; a second host material layer disposed on the upper side of the first host material layer is mixed with a second guest luminous substance, which can be under the action of the external bias Project a second-color light source; / A third host material layer provided on the upper side of the second host material layer is mixed with one or two luminous substances, which can project a third-color light source under the external bias; A first carrier blocking layer on the upper side of the host material layer; and a second conductive layer having a second type conductivity, which is disposed on the first carrier P and on the upper side of the barrier layer. 200407049 VI. Scope of patent application '1 4 · An organic electro-optic light device, the main structure of which includes at least: an anode, a hole transmission layer provided on the upper side of the anode; a hole transmission layer provided on the hole An upper electronic barrier layer; a first host material layer disposed on the upper side of the electronic barrier layer, a first guest luminous substance mixed therein, which can project a first-color light source under an external bias; A second host material layer provided on the upper side of the first host material layer is mixed with a second guest luminous substance, and a second color light source can be projected under the external bias; A third host material layer on the upper side of the host material layer is mixed with a third guest luminous substance, and a third color light source can be projected under the external bias; and a third light source is provided on the upper side of the third host material layer. A hole barrier layer; an electron transport layer provided on the upper side of the hole barrier layer; and a cathode provided on the upper side of the electron transport layer. 1 5 · The organic electro-optical light-emitting device according to item 4 of the patent application scope, wherein a light-transmitting substrate may be provided on the lower side of the anode. 16 · The organic electroluminescence device described in item 14 of the scope of patent application, wherein ... the first host material layer is an NPB layer, the second host material layer is a DPVBi layer, and the third emitter layer is It is an Alq3 layer. 17 · The organic electroluminescence device according to item 14 of the scope of patent application, wherein the first color light source is red light, the second color light source is blue light, and the second-color light source is green light. 200407049 6. The scope of patent application 1 8 · The organic electroluminescent device as described in item 14 of the scope of patent application, wherein the first guest luminous substance, the second guest luminous substance and the third guest luminous substance can be individually The choice is one of a fluorescent substance, a phosphorescent substance, and a combination thereof. 19 · The organic electro-optic device described in item 4 of the patent application scope, wherein the hole blocking layer is a BCP layer. 2 0. The organic electro-optic device according to item 14 of the scope of the patent application, wherein the electron blocking layer is a LiF layer. 2 1 * — An organic electro-optical light-emitting device whose main structure includes at least: a light-transmitting substrate; an anode provided on the upper side of the light-transmitting substrate; a hole injection layer provided on the upper side of the anode; The hole injection layer is an NPB layer on the upper side; a LiF layer is provided on the upper side of the NPB layer; an NPB layer is provided on the upper side of the LiF layer, and a DCM2 substance is mixed therein, which can be projected under an external bias A red light source is provided; a DPVBi layer provided on the upper side of the NPB layer is mixed with a DSA substance to project a blue light source under the external bias; an Alq3 layer is provided on the upper side of the DPVBi layer; The inner hybrid is provided with a C6 powder which can project a green light source under the external bias; a BCP layer provided on the upper side of the DPVBi layer; a a 1 q layer provided on the upper side of the BCP layer; a An electron injection layer provided on the upper side of the electron transport layer; and a cathode provided on the upper side of the electron injection layer. Page 20, 200407049 6. Scope of patent application --------------- — 22 · As stated in the scope of the patent scope of the organic electro-optical excitation device, where the 4 holes > the main entrance layer system can be a M —MTDATA layer. 23 · The organic electro-optical device described in item 21 of the scope of the patent application, wherein the electrons> main entrance layer system may be a L i F layer. 24. An organic electro-optical light-emitting device, the main structure of which comprises at least a first conductive layer having a first conductivity; a second carrier blocking layer provided on the upper side of the first conductive layer At least one host material layer provided on the upper side of the second carrier blocking layer, and at least one guest light emitting substance is mixed in the host material layer; a first carrier blocking layer provided on the upper side of the host material layer; 'And a second conductive layer having a second type of conductivity is disposed on the upper side of the first carrier blocking layer. 25. The organic electroluminescent device according to item 24 of the scope of the patent application, wherein the guest luminous substance is one of a fluorescent substance, a phosphorescent substance, and a combination thereof. Μ · An organic electro-optical excitation light device, the main structure of which includes at least: an anode; < an electron blocking layer provided on the upper side of the anode; at least one main material layer provided on the upper side of the electron blocking layer, the main body _ The material layer is mixed with at least one guest luminous substance; (a hole blocking layer provided on the upper side of the host material layer; and a cathode provided on the upper side of the hole blocking layer. 27 · -Organic electrical excitation The manufacturing method of the optical device includes the following steps: Page 21, 200407049 6. The scope of the patent application forms a first host material layer on the upper side of an anode, and a bulk material layer may be mixed with a first guest light object to form a second host material layer on the first host material. A second substance may be mixed in the second host material layer; a third host material layer may be formed in the second host material layer and a third substance may be mixed in the third host material layer; and a When the cathode is above the third body material layer and an external bias is applied to the cathode, the body material layer will project a light source of a first color, the second layer will project a light source of a second color, and the The third body material is a third-color light source. 2 8 · According to the manufacturing method described in item 27 of the scope of patent application, the following steps are still required: forming an electron blocking layer on the upper side of the anode, and then sequentially forming the first, main material layer, second Layer and a third host material layer. 29. According to the manufacturing method described in item 27 of the scope of patent application, the following steps are still required: forming a hole blocking layer on the third main material layer and forming the cathode on the hole blocking layer. 30. According to the manufacturing method described in item 27 of the scope of patent application, the following steps are still required: the first host substance; the upper side, the upper side of the guest luminous body, and the guest luminous body when the anode is the first main host material layer will be The projection may include an electron barrier. The main material may include a side, and then may include a 200407049 six 31 32 33 34. The scope of patent application forms a hole transport layer on the anode side, and then sequentially on the hole transport layer side. The first host material layer, the second host material layer, and the second host material layer are formed. • The manufacturing method described in item 27 of the patent application scope may further include the following steps: forming an electron transport layer on the upper side of the third host material layer, and forming the cathode on the electron transport layer. • The manufacturing method as described in item 27 of the scope of the patent application, wherein the first guest luminous substance, the second guest luminous substance, and the third guest luminous substance can be individually selected as a fluorescent substance, a phosphorescent substance, and One of its combinations. • The manufacturing method as described in item 27 of the scope of patent application, wherein the first host material layer is an NPB layer, the first guest luminous substance material is a DCM2, and the second host material layer is a swollen soil. Layer, the second guest material is a DSA, and the third host material layer is an Alq3 layer, and the third guest material is a C6. A method for manufacturing an organic electroluminescent device, which The main steps include: forming an electron blocking layer on the upper side of an anode; forming at least one host material layer on the upper side of the electron blocking layer, and the host material layer is mixed with at least one corresponding guest light emitting substance Forming a hole blocking layer on the upper side of the body material layer; and forming a cathode on the hole blocking layer. Page 23