CN106316924B - 一种热活化延迟荧光材料 - Google Patents
一种热活化延迟荧光材料 Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 38
- 230000003111 delayed effect Effects 0.000 title claims abstract description 18
- 238000007725 thermal activation Methods 0.000 claims abstract 3
- 125000000609 carbazolyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3NC12)* 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 5
- -1 methoxy, phenyl Chemical group 0.000 claims description 4
- 125000000641 acridinyl group Chemical group C1(=CC=CC2=NC3=CC=CC=C3C=C12)* 0.000 claims description 3
- 125000001484 phenothiazinyl group Chemical group C1(=CC=CC=2SC3=CC=CC=C3NC12)* 0.000 claims description 3
- 125000001644 phenoxazinyl group Chemical group C1(=CC=CC=2OC3=CC=CC=C3NC12)* 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 2
- 229910052739 hydrogen Inorganic materials 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 claims description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims 1
- 125000004432 carbon atom Chemical group C* 0.000 claims 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 abstract description 18
- 230000015572 biosynthetic process Effects 0.000 abstract description 12
- 238000003786 synthesis reaction Methods 0.000 abstract description 12
- 125000004093 cyano group Chemical group *C#N 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- ATTVYRDSOVWELU-UHFFFAOYSA-N 1-diphenylphosphoryl-2-(2-diphenylphosphorylphenoxy)benzene Chemical group C=1C=CC=CC=1P(C=1C(=CC=CC=1)OC=1C(=CC=CC=1)P(=O)(C=1C=CC=CC=1)C=1C=CC=CC=1)(=O)C1=CC=CC=C1 ATTVYRDSOVWELU-UHFFFAOYSA-N 0.000 description 32
- AWXGSYPUMWKTBR-UHFFFAOYSA-N 4-carbazol-9-yl-n,n-bis(4-carbazol-9-ylphenyl)aniline Chemical compound C12=CC=CC=C2C2=CC=CC=C2N1C1=CC=C(N(C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=2C=CC(=CC=2)N2C3=CC=CC=C3C3=CC=CC=C32)C=C1 AWXGSYPUMWKTBR-UHFFFAOYSA-N 0.000 description 16
- 101000837344 Homo sapiens T-cell leukemia translocation-altered gene protein Proteins 0.000 description 16
- 102100028692 T-cell leukemia translocation-altered gene protein Human genes 0.000 description 16
- 238000004770 highest occupied molecular orbital Methods 0.000 description 16
- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 14
- 238000000921 elemental analysis Methods 0.000 description 14
- 238000004949 mass spectrometry Methods 0.000 description 14
- 239000000376 reactant Substances 0.000 description 11
- 238000010189 synthetic method Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 9
- 239000000758 substrate Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- GUBGUXGKVFBTRZ-UHFFFAOYSA-N 1-methoxy-9h-carbazole Chemical group C12=CC=CC=C2NC2=C1C=CC=C2OC GUBGUXGKVFBTRZ-UHFFFAOYSA-N 0.000 description 3
- BKPDQETYXNGMRE-UHFFFAOYSA-N 1-tert-butyl-9h-carbazole Chemical group N1C2=CC=CC=C2C2=C1C(C(C)(C)C)=CC=C2 BKPDQETYXNGMRE-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000975 dye Substances 0.000 description 3
- 230000005525 hole transport Effects 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 239000012299 nitrogen atmosphere Substances 0.000 description 3
- LPNYRYFBWFDTMA-UHFFFAOYSA-N potassium tert-butoxide Chemical compound [K+].CC(C)(C)[O-] LPNYRYFBWFDTMA-UHFFFAOYSA-N 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- FBTOLQFRGURPJH-UHFFFAOYSA-N 1-phenyl-9h-carbazole Chemical group C1=CC=CC=C1C1=CC=CC2=C1NC1=CC=CC=C12 FBTOLQFRGURPJH-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 229920000767 polyaniline Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- UHXOHPVVEHBKKT-UHFFFAOYSA-N 1-(2,2-diphenylethenyl)-4-[4-(2,2-diphenylethenyl)phenyl]benzene Chemical compound C=1C=C(C=2C=CC(C=C(C=3C=CC=CC=3)C=3C=CC=CC=3)=CC=2)C=CC=1C=C(C=1C=CC=CC=1)C1=CC=CC=C1 UHXOHPVVEHBKKT-UHFFFAOYSA-N 0.000 description 1
- HIAGSPVAYSSKHL-UHFFFAOYSA-N 1-methyl-9h-carbazole Chemical group N1C2=CC=CC=C2C2=C1C(C)=CC=C2 HIAGSPVAYSSKHL-UHFFFAOYSA-N 0.000 description 1
- YXWJGZQOGXGSSC-UHFFFAOYSA-N 2,3,4,5,6-pentafluorobenzonitrile Chemical compound FC1=C(F)C(F)=C(C#N)C(F)=C1F YXWJGZQOGXGSSC-UHFFFAOYSA-N 0.000 description 1
- IOQMWOBRUDNEOA-UHFFFAOYSA-N 2,3,5,6-tetrafluorobenzonitrile Chemical compound FC1=CC(F)=C(F)C(C#N)=C1F IOQMWOBRUDNEOA-UHFFFAOYSA-N 0.000 description 1
- HTKFGTCCOJIUIK-UHFFFAOYSA-N 2,4,6-trifluorobenzonitrile Chemical compound FC1=CC(F)=C(C#N)C(F)=C1 HTKFGTCCOJIUIK-UHFFFAOYSA-N 0.000 description 1
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229920000144 PEDOT:PSS Polymers 0.000 description 1
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005284 basis set Methods 0.000 description 1
- DZBUGLKDJFMEHC-UHFFFAOYSA-N benzoquinolinylidene Natural products C1=CC=CC2=CC3=CC=CC=C3N=C21 DZBUGLKDJFMEHC-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910001512 metal fluoride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000001791 phenazinyl group Chemical group C1(=CC=CC2=NC3=CC=CC=C3N=C12)* 0.000 description 1
- 229950000688 phenothiazine Drugs 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920003055 poly(ester-imide) Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000123 polythiophene Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XESUCHPMWXMNRV-UHFFFAOYSA-M sodium;2-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=CC=C1C=C XESUCHPMWXMNRV-UHFFFAOYSA-M 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
- BNEMLSQAJOPTGK-UHFFFAOYSA-N zinc;dioxido(oxo)tin Chemical compound [Zn+2].[O-][Sn]([O-])=O BNEMLSQAJOPTGK-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/86—Carbazoles; Hydrogenated carbazoles with only hydrogen atoms, hydrocarbon or substituted hydrocarbon radicals, directly attached to carbon atoms of the ring system
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- C07D209/56—Ring systems containing three or more rings
- C07D209/80—[b, c]- or [b, d]-condensed
- C07D209/82—Carbazoles; Hydrogenated carbazoles
- C07D209/88—Carbazoles; Hydrogenated carbazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to carbon atoms of the ring system
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- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D219/00—Heterocyclic compounds containing acridine or hydrogenated acridine ring systems
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- C07—ORGANIC CHEMISTRY
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- C07D241/00—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings
- C07D241/36—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems
- C07D241/38—Heterocyclic compounds containing 1,4-diazine or hydrogenated 1,4-diazine rings condensed with carbocyclic rings or ring systems with only hydrogen or carbon atoms directly attached to the ring nitrogen atoms
- C07D241/46—Phenazines
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- C07D265/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one oxygen atom as the only ring hetero atoms
- C07D265/28—1,4-Oxazines; Hydrogenated 1,4-oxazines
- C07D265/34—1,4-Oxazines; Hydrogenated 1,4-oxazines condensed with carbocyclic rings
- C07D265/38—[b, e]-condensed with two six-membered rings
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- C07D279/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one sulfur atom as the only ring hetero atoms
- C07D279/10—1,4-Thiazines; Hydrogenated 1,4-thiazines
- C07D279/14—1,4-Thiazines; Hydrogenated 1,4-thiazines condensed with carbocyclic rings or ring systems
- C07D279/18—[b, e]-condensed with two six-membered rings
- C07D279/22—[b, e]-condensed with two six-membered rings with carbon atoms directly attached to the ring nitrogen atom
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Abstract
Description
技术领域
本发明属于OLED发光层材料领域,具体涉及一种热活化延迟荧光材料。
背景技术
在OLED材料的选择上,单线态发光的荧光材料寿命好,价格低廉,但是效率低;三线态发光的磷光材料效率高,但是价格昂贵,而且蓝光材料的寿命问题一直没有解决。日本九州大学的Adachi提出了一类新的有机发光材料,即热活化延迟荧光(TADF)材料。该类材料的单线态-三线态能隙(ΔEST)非常小(<0.3 eV),三线态激子可以通过反向系间窜越(RIST)转变成单线态激子发光,因此器件的内量子效率可以达到100%。
发明内容
本发明提供了一种新型的热活化延迟荧光材料。
本发明的一种热活化延迟荧光材料,具有如式Ⅰ所示结构,
式 Ⅰ
其中,R1~ R5中最多有两个为H,其余均为给电子基团。
优选地,R1~ R5中一个为H,其余均为给电子基团。
优选地,所述给电子基团为取代或未取代的咔唑基,取代或未取代的吲哚咔唑基,取代或未取代的吩恶嗪基,取代或未取代的吩噻嗪基,取代或未取代的吖啶基。
优选地,所述给电子基团为如下结构的基团:
优选地,R6 和R7选自氢,甲基,叔丁基,甲氧基,苯基,取代或未取代的咔唑基。
优选地,上述的热活化延迟荧光材料为具有如下结构的化合物:
C1
C2
C3
C4
C5
C6
,
C7
C8
C9
C10
C11
C12
C13
C14。
本发明能够达到以下效果:
1、本发明提供了一种全新的热活化延迟荧光材料,其单线态-三线态能隙(<0.3eV),可以有效的发出延迟荧光。
2、本发明的热活化延迟荧光材料分子式中只含有一个氰基和至多两个H,其余均为给电子基团,该结构的优势为:
1)单个氰基的吸电子能力较弱,能够获得更宽带隙(2.5ev-3.5ev)的材料,有助于蓝光材料的构筑;
2)单个氰基材料的LUMO能级更浅(2.7eV左右),作为OLED发光层的染料时,对主体材料的依赖性更弱;
3)原料的合成更简单,价格更便宜。
具体实施方式
下面结合具体实施例对本发明作进一步说明,以使本领域的技术人员可以更好的理解本发明并能予以实施,但所举实施例不作为对本发明的限定。
本发明的热活化延迟荧光材料,具有如下结构:
式 Ⅰ
其中,R1~ R5中最多有两个为H,其余均为给电子基团。
此结构给体和苯环的平面因为大位阻的原因具有较大的扭曲结构,因此材料的HOMO和LUMO能级会分别分布在给体和受体上。HOMO与LUMO的空间分离能够减小单线态和三线态的能隙,从而实现其能隙差小于0.3 eV。材料的能隙可以通过理论计算得到。
本发明的热活化延迟荧光材料为具有如下结构的化合物:
下述化合物的单线态-三线态能隙通过Gaussian 09软件,TDDFT基组计算得出。
C1(单线态-三线态能隙0.24 eV) (HOMO 5.54 eV ,LUMO 2.74 eV)
C2(单线态-三线态能隙0.20 eV) (HOMO 5.45eV, LUMO 2.74 eV)
C3(单线态-三线态能隙0.18 eV) (HOMO5.40 eV,LUMO2.73 eV)
C4(单线态-三线态能隙0.28 eV) (HOMO 5.73 eV,LUMO 2.87 eV)
C5(单线态-三线态能隙0.25 eV) (HOMO 5.48 eV,LUMO 2.73 eV)
C6(单线态-三线态能隙0.25 eV) (HOMO 5.52 eV,LUMO 2.70 eV)
C7(单线态-三线态能隙0.22 eV) (HOMO 5.50 eV,LUMO 2.70 eV)
C8(单线态-三线态能隙0.25 eV) (HOMO 5.49 eV,LUMO 2.74 eV)
C9(单线态-三线态能隙0.28 eV) (HOMO 5.68 eV,LUMO 2.50 eV)
C10(单线态-三线态能隙0.27 eV) (HOMO 5.69 eV,LUMO 2.51 eV)
C11(单线态-三线态能隙0.12 eV) (HOMO 5.55 eV,LUMO 2.75 eV)
C12(单线态-三线态能隙0.11 eV) (HOMO 5.58 eV,LUMO 2.78 eV)
C13(单线态-三线态能隙0.13 eV) (HOMO 5.45 eV,LUMO 2.70 eV)
C14(单线态-三线态能隙0.11 eV) (HOMO 5.40 eV,LUMO 2.69 eV)。
合成实验
实施例1
合成C1。在氮气氛围下,将1mol叔丁醇钾溶解到20mlDML中搅拌1小时,然后将溶有1mol咔唑的DML溶液逐滴加入,全部加完后搅拌1小时。随后将溶有0.2 mol 2,3,4,5,6-五氟苯腈的DMF溶液逐滴加入,搅拌5小时。随后将反应液倒入水中,过滤得到固体。用色谱柱分离。得C1,产率90%。
质谱:929。
元素分析:C:86.60,H:4.35,N:9.05。
实施例2
合成C2。反应物咔唑替换为叔丁基咔唑,经过与实施例1相同的合成方法,得C2,产率91%。
质谱:1490。
元素分析:C: 86.20, H: 8.16, N: 5.64。
实施例3
合成C3。反应物咔唑替换为苯基咔唑,经过与实施例1相同的合成方法,得C3,产率91%。
质谱:1689。
元素分析:C: 90.20 H: 4.83 N: 4.97。
实施例4
合成C4。在氮气氛围下,将1mol叔丁醇钾溶解到20mlDML中搅拌1小时,然后将溶有1mol咔唑的DML溶液逐滴加入,全部加完后搅拌1小时。随后将溶有0.25 mol 2,3,5,6-四氟苯腈的DMF溶液逐滴加入,搅拌5小时。随后将反应液倒入水中,过滤得到固体。用色谱柱分离。得C4,产率90%。
质谱:763。
元素分析:C: 86.47, H: 4.36, N: 9.17。
实施例5
合成C5。反应物咔唑替换为叔丁基咔唑,经过与实施例4相同的合成方法,得C5,产率91%。
质谱:1212。
元素分析:C: 86.15, H: 8.07, N: 5.77。
实施例6
合成C6。反应物咔唑替换为甲基咔唑,经过与实施例4相同的合成方法,得C6,产率91%。
质谱:876。
元素分析:C: 86.36, H: 5.65, N: 7.99。
实施例7
合成C7。 反应物咔唑替换为苯基咔唑,经过与实施例4相同的合成方法,得C7,产率91%。
质谱:1372。
元素分析:C: 90.10 H: 4.79 N:5.10。
实施例8
合成C2。 反应物咔唑替换为甲氧基咔唑,经过与实施例4相同的合成方法,得C8,产率91%。
质谱:1004。
元素分析:C:75.35 H:4.93, N: 6.97。
实施例9
合成C9。 在氮气氛围下,将1mol叔丁醇钾溶解到20mlDML中搅拌1小时,然后将溶有1mol甲氧基咔唑的DML溶液逐滴加入,全部加完后搅拌1小时。随后将溶有0.33 mol2,4,6-三氟苯腈的DMF溶液逐滴加入,搅拌5小时。随后将反应液倒入水中,过滤得到固体。用色谱柱分离。得C9,产率90%。
质谱:778。
元素分析:C:75.55 H: 4.93 N: 7.19。
实施例10
合成C10。 反应物甲氧基咔唑替换为叔丁基咔唑,经过与实施例9相同的合成方法,得C10,产率91%。
质谱:935。
元素分析:C: 86.00 H: 7.81 N: 5.99。
实施例11
合成C11。反应物咔唑替换为吩恶嗪,经过与实施例4相同的合成方法,得C11,产率91%。
质谱:829。
元素分析:C:79.79 H: 4.00 N:8.48。
实施例12
合成C12。反应物咔唑替换为吩噻嗪,经过与实施例4相同的合成方法,得C12,产率91%。
质谱:892。
元素分析:C: 74.05, H: 3.70 N: 7.88。
实施例13
合成C13。反应物咔唑替换为吖啶,经过与实施例4相同的合成方法,得C13,产率91%
质谱:932。
元素分析:C:86.32 H: 6.15 N:7.52。
实施例14
合成C14。反应物咔唑替换为吩嗪,经过与实施例4相同的合成方法,得C14,产率91%。
质谱:880。
元素分析:C:80.50 H:5.17 N:14.32。
本发明的热活化延迟荧光材料的应用:
有机电致发光器件中的基本结构包括:依次层叠的基板,阳极,空穴传输层,发光层,电子传输层和阴极。
基体为透明基体,可以是玻璃或是柔性基片,柔性基片采用聚酯类、聚酰亚胺类化合物中的一种材料;第一电极层(阳极层),可以采用无机材料或有机导电聚合物,无机材料一般为ITO、氧化锌、氧化锡锌等金属氧化物或金、铜、银等功函数较高的金属,最优化的选择为ITO,有机导电聚合物优选为聚噻吩/聚乙烯基苯磺酸钠(以下简称PEDOT:PSS)、聚苯胺(以下简称PANI)中的一种材料;第二电极层(阴极层、金属层),一般采用锂、镁、钙、锶、铝、铟等功函数较低的金属或它们与铜、金、银的合金,或金属与金属氟化物交替形成的电极层,本发明优选为依次的Mg:Ag合金层、Ag层和依次的LiF层、Al层。
本发明的下述实施例中,OLED包括依次层叠的阳极/空穴传输层/第一激子阻挡层/发光层/第二激子阻挡层/电子传输层/电子注入层/阴极。其中,阳极为ITO;空穴传输层为NPB;第一激子阻挡层由TCTA层和mCP层层叠构成;发光层的主体材料为DPEPO,其中掺杂本发明的热活化延迟荧光材料(C1-C14)作为发光染料,掺杂的质量百分比浓度为10%;第二激子阻挡层为DPEPO;电子传输层为Bphen;电子注入层为LiF;阴极为Al。
上述材料作为发光层染料的OLED性能数据如下:
编号 | 器件结构 | 亮度 cd/m<sup>2</sup> | 电压 V | 电流效率cd/A | 外量子效率 | 色坐标 |
实施例1 | ITO/NPB/TCTA/mCP/DPEPO:10%C1/DPEPO/Bphen/LiF/Al | 500 | 5.0 | 10 | 8% | (0.20,0.38) |
实施例2 | ITO/NPB/TCTA/mCP/DPEPO:10%C2/DPEPO/Bphen/LiF/Al | 500 | 4.9 | 15 | 10% | (0.20,0.39) |
实施例3 | ITO/NPB/TCTA/mCP/DPEPO:10%C3/DPEPO/Bphen/LiF/Al | 500 | 4.8 | 18 | 11% | (0.20,0.40) |
实施例4 | ITO/NPB/TCTA/mCP/DPEPO:10%C4/DPEPO/Bphen/LiF/Al | 500 | 5.5 | 8 | 6% | (0.20,0.41) |
实施例5 | ITO/NPB/TCTA/mCP/DPEPO:10%C5/DPEPO/Bphen/LiF/Al | 500 | 5.4 | 16 | 10% | (0.16,0.21) |
实施例6 | ITO/NPB/TCTA/mCP/DPEPO:10%C6/DPEPO/Bphen/LiF/Al | 500 | 5.3 | 17 | 11% | (0.17,0.21) |
实施例7 | ITO/NPB/TCTA/mCP/DPEPO:10%C7/DPEPO/Bphen/LiF/Al | 500 | 5.2 | 18 | 12% | (0.17,0.22) |
实施例8 | ITO/NPB/TCTA/mCP/DPEPO:10%C8/DPEPO/Bphen/LiF/Al | 500 | 5.1 | 20 | 13% | (0.18,0.22) |
实施例9 | ITO/NPB/TCTA/mCP/DPEPO:10%C9/DPEPO/Bphen/LiF/Al | 500 | 5.7 | 10 | 7% | (0.15,0.18) |
实施例10 | ITO/NPB/TCTA/mCP/DPEPO:10%C10/DPEPO/Bphen/LiF/Al | 500 | 5.8 | 11 | 7% | (0.15,0.19) |
实施例11 | ITO/NPB/TCTA/mCP/DPEPO:10%C11/DPEPO/Bphen/LiF/Al | 500 | 4.8 | 30 | 10% | (0.50,0.48) |
实施例12 | ITO/NPB/TCTA/mCP/DPEPO:10%C12/DPEPO/Bphen/LiF/Al | 500 | 4.9 | 31 | 12% | (0.51,0.49) |
实施例13 | ITO/NPB/TCTA/mCP/DPEPO:10%C13/DPEPO/Bphen/LiF/Al | 500 | 4.5 | 38 | 14% | (0.49,0.45) |
实施例14 | ITO/NPB/TCTA/mCP/DPEPO:10%C14/DPEPO/Bphen/LiF/Al | 500 | 5.0 | 28 | 8% | (0.55,0.50) |
对比例 | ITO/NPB/TCTA/mCP/DPEPO:10%DPVBi/DPEPO/Bphen/LiF/Al | 500 | 5.5 | 6 | 4% | (0.20,0.35) |
从上表可看出,基于合成材料的器件能够实现超过传统荧光5%外量子效率的限制,实现更高的效率。以上所述实施例仅是为充分说明本发明而所举的较佳的实施例,本发明的保护范围不限于此。本技术领域的技术人员在本发明基础上所作的等同替代或变换,均在本发明的保护范围之内。本发明的保护范围以权利要求书为准。
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