KR101976104B1 - 저휘도에서의 oled 디바이스 효율 감소 - Google Patents
저휘도에서의 oled 디바이스 효율 감소 Download PDFInfo
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- KR101976104B1 KR101976104B1 KR1020120121516A KR20120121516A KR101976104B1 KR 101976104 B1 KR101976104 B1 KR 101976104B1 KR 1020120121516 A KR1020120121516 A KR 1020120121516A KR 20120121516 A KR20120121516 A KR 20120121516A KR 101976104 B1 KR101976104 B1 KR 101976104B1
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- emitting device
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/06—Luminescent, e.g. electroluminescent, chemiluminescent materials containing organic luminescent materials
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
- H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
- H10K50/121—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants for assisting energy transfer, e.g. sensitization
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/14—Carrier transporting layers
- H10K50/16—Electron transporting layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/18—Carrier blocking layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/81—Anodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/805—Electrodes
- H10K50/82—Cathodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
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- H—ELECTRICITY
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- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K85/00—Organic materials used in the body or electrodes of devices covered by this subclass
- H10K85/30—Coordination compounds
- H10K85/321—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3]
- H10K85/324—Metal complexes comprising a group IIIA element, e.g. Tris (8-hydroxyquinoline) gallium [Gaq3] comprising aluminium, e.g. Alq3
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Abstract
Description
도 2는 별도의 전자 수송층을 갖지 않는 반전 유기 발광 디바이스를 도시한 것이다.
도 3은 실시예 1 및 실시예 2에 기술된 바와 같이, 발광층과 정공 차단층 사이에 엑시톤 소광층을 가진 개략적 디바이스 구조를 도시한 것이다.
도 4는 실시예 1 및 실시예 2와 비교실시예 1에 대한 효율-휘도 플롯을 도시한 것이다.
도 5는 실시예 1 및 실시예 2와 비교실시예 1에 대한 전류 밀도-전압 플롯을 도시한 것이다.
도 6은 엑시톤 소광층이 비-발광 소광물질이 도핑된 정공 차단층인 개략적 디바이스 구조를 도시한 것이다.
도 7은 실시예 3 내지 실시예 5 및 비교실시예 1에 대한 효율-휘도 플롯을 도시한 것이다.
도 8은 실시예 3 내지 실시예 5 및 비교실시예 1에 대한 전류 밀도-전압 플롯을 도시한 것이다.
도 9는 엑시톤 소광층이 비-발광 소광물질이 도핑된 전자 수송층이며 발광층에 인접하여 배치된 개략적 디바이스 구조를 도시한 것이다.
도 10은 엑시톤 소광층이 비-발광 소광물질이 도핑된 전자 수송층이며 발광층에 인접하여 배치된 개략적 디바이스 구조를 도시한 것이다.
도 11은 발광층과 정공 수송층 사이에 배치된 엑시톤 소광층을 갖는 개략적 디바이스 구조를 도시한 것이다.
도 12는 발광층과 애노드 사이에 배치된 엑시톤 소광층을 갖는 개략적 디바이스 구조를 도시한 것이다.
도 13은 필수적으로 소광물질으로 구성된 엑시톤 소광층을 갖는 개략적 디바이스 구조를 도시한 것이다.
도 14는 비-발광 소광물질이 도핑된 호스트로 구성된 엑시톤 소광층을 갖는 개략적 디바이스 구조를 도시한 것이다.
도 15는 발광층 및 엑시톤 소광층에서 사용되는 동일한 호스트를 갖는 개략적 디바이스 구조를 도시한 것이다.
도 16은 엑시톤 소광층에 발광물질을 갖는 개략적 디바이스 구조를 도시한 것이다.
도 17은 발광물질을 포함하지 않는 엑시톤 소광층을 갖는 개략적 디바이스 구조를 도시한 것이다.
도 18은 발광층 및 엑시톤 소광층에서 사용되는 서로 다른 호스트 물질들을 갖는 개략적 디바이스 구조를 도시한 것이다.
화합물 | 기능 | T1 [eV] |
H | 호스트 | 2.63 |
G1 | 에미터 | 2.40 |
BL | 정공 차단제 | 2.63 |
Alq | ETL, 소광제 | 2.0 |
NPD | HTL, 소광제 | 2.29 |
디바이스 예 |
소광층: Alq3 두께 [Å] | 1931 CIE | |||
x | y | λ max [nm] | FWHM [nm] | ||
CE1 | 0 | 0.331 | 0.624 | 526 | 68 |
실시예 1 | 5 | 0.329 | 0.625 | 526 | 66 |
실시예 2 | 10 | 0.328 | 0.624 | 526 | 66 |
디바이스 예 | 1 nit에서 | 3000 nit에서 | LE 비 | |||
LE [cd/A] | 전압 [V] | LE [cd/A] | EQE [%] | PE [lm/W] | 3000 nit에서 LE/1 nit에서 LE | |
CE 1 | 65 | 5.6 | 58.8 | 16 | 33.1 | 0.9 |
예 1 | 12 | 6.3 | 29.5 | 8.1 | 14.6 | 2.5 |
예 2 | 6 | 6.6 | 24 | 6.6 | 11.3 | 4.0 |
디바이스 예 |
HBL내 Alq3 소광제 농도[%] | 1931 CIE | |||
x | y | λ max [nm] | FWHM [nm] | ||
CE1 | 0 | 0.331 | 0.624 | 526 | 68 |
실시예 3 | 5 | 0.337 | 0.620 | 526 | 70 |
실시예 4 | 10 | 0.339 | 0.619 | 526 | 70 |
실시예 5 | 20 | 0.337 | 0.620 | 526 | 70 |
디바이스 예 |
1 nit에서 | 3,000 nit에서 | LE 비 | |||
LE [cd/A] | 전압 [V] | LE [cd/A] | EQE [%] | PE [lm/W] | 3000 nit에서 LE/1 nit에서 LE | |
CE1 | 65 | 5.6 | 58.8 | 16 | 33.1 | 0.9 |
실시예 3 | 38 | 5.7 | 46.1 | 12.6 | 25.2 | 1.2 |
실시예 4 | 27 | 5.8 | 43.1 | 11.8 | 23.4 | 1.6 |
실시예 5 | 14 | 5.8 | 37.7 | 10.3 | 20.6 | 2.7 |
Claims (56)
- 제 1 전극;
제 2 전극;
상기 제 1 전극과 상기 제 2 전극 사이에 배치된 발광층으로서, 제 1 트리플렛(triplet) 에너지 레벨(T1)을 갖는 발광물질을 포함하는 발광층; 및
상기 발광층과 상기 제 2 전극 사이에 배치된 엑시톤 소광층으로서, 제 2 트리플렛 에너지 레벨(T1)을 갖는 비-발광 소광물질을 포함하는 엑시톤 소광층을 포함하는 발광 디바이스로서,
상기 엑시톤 소광층은 상기 발광층에 인접하여 배치되고;
상기 발광물질은 인광 또는 지체된 형광에 의해 방출하고;
상기 제 1 트리플렛 에너지 레벨(T1)은 상기 제 2 트리플렛 에너지 레벨(T1)보다 높은, 발광 디바이스. - 청구항 1에 있어서, 상기 엑시톤 소광층은 필수적으로 상기 비-발광 소광물질로 구성되는, 발광 디바이스.
- 청구항 1에 있어서, 상기 발광층은 상기 발광물질이 도핑된 제 1 호스트를 포함하는, 발광 디바이스.
- 청구항 3에 있어서, 상기 엑시톤 소광층은 상기 비-발광 소광물질이 도핑된 제 2 호스트를 포함하는, 발광 디바이스.
- 청구항 4에 있어서, 상기 제 1 호스트 및 상기 제 2 호스트는 동일한 물질인, 발광 디바이스.
- 청구항 5에 있어서, 상기 엑시톤 소광층은 상기 발광물질을 추가로 포함하는, 발광 디바이스.
- 청구항 5에 있어서, 상기 엑시톤 소광층은 상기 발광물질을 포함하지 않는, 발광 디바이스.
- 청구항 4에 있어서, 상기 제 1 호스트 및 상기 제 2 호스트는 동일한 물질이 아닌, 발광 디바이스.
- 청구항 8에 있어서, 상기 엑시톤 소광층은 상기 발광물질을 추가로 포함하는, 발광 디바이스.
- 청구항 8에 있어서, 상기 엑시톤 소광층은 상기 발광물질을 포함하지 않는, 발광 디바이스.
- 청구항 1에 있어서, 상기 제 1 전극은 애노드이고 상기 제 2 전극은 캐소드인, 발광 디바이스.
- 청구항 1에 있어서, 상기 제 1 전극은 캐소드이며 상기 제 2 전극은 애노드인, 발광 디바이스.
- 청구항 11에 있어서, 상기 엑시톤 소광층과 상기 캐소드 사이에 전자 수송층을 추가로 포함하는, 발광 디바이스.
- 청구항 12에 있어서, 상기 엑시톤 소광층과 상기 캐소드 사이에 배치된 전자 수송층을 추가로 포함하는, 발광 디바이스.
- 청구항 14에 있어서, 상기 엑시톤 소광층은 상기 전자 수송층에 인접하여 배치된, 발광 디바이스.
- 청구항 14에 있어서, 상기 엑시톤 소광층과 상기 전자 수송층 사이에 배치된 정공 차단층을 추가로 포함하는, 발광 디바이스.
- 청구항 16에 있어서, 상기 정공 차단층은 상기 엑시톤 소광층에 바로 인접하여 배치된, 발광 디바이스.
- 청구항 17에 있어서, 상기 정공 차단층은 상기 비-발광 소광물질이 도핑된, 발광 디바이스.
- 청구항 14에 있어서, 상기 엑시톤 소광층은 상기 비-발광 소광물질이 도핑된 정공 차단층인, 발광 디바이스.
- 청구항 1에 있어서, 상기 제 1 트리플렛 에너지(T1)는 상기 제 2 트리플렛 에너지(T1)보다 0.1 내지 1.5 eV 더 높은, 발광 디바이스.
- 청구항 1에 있어서, 상기 제 1 트리플렛 에너지(T1)는 상기 제 2 트리플렛 에너지(T1)보다 0.1 내지 1.0 eV 더 높은, 발광 디바이스.
- 청구항 1에 있어서, 상기 제 1 트리플렛 에너지(T1)는 상기 제 2 트리플렛 에너지(T1)보다 0.1 내지 0.6 eV 더 높은, 발광 디바이스.
- 청구항 1에 있어서, 상기 엑시톤 소광층은 0.5 내지 50Å의 두께를 갖는, 발광 디바이스.
- 청구항 1에 있어서, 상기 엑시톤 소광층은 1 내지 20Å의 두께를 갖는, 발광 디바이스.
- 청구항 1에 있어서, 상기 엑시톤 소광층은 2 내지 12Å의 두께를 갖는, 발광 디바이스.
- 청구항 1에 있어서, 3000 nit에서 광도 효율 대 1 nit에서 광도 효율의 비는 1.0 내지 10.0의 범위인, 발광 디바이스.
- 청구항 26에 있어서, 상기 디바이스는 녹색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 800 nit에서 광도 효율 대 1 nit에서 광도 효율의 비는 1.0 내지 10.0의 범위인, 발광 디바이스.
- 청구항 28에 있어서, 상기 디바이스는 적색 광 또는 청색 광을 방출하는, 발광 디바이스.
- 청구항 26에 있어서, 상기 비는 1.5 내지 5.5의 범위인, 발광 디바이스.
- 청구항 26에 있어서, 상기 비는 2.0 내지 5.0의 범위인, 발광 디바이스.
- 청구항 26에 있어서, 상기 비는 2.5 내지 4.0의 범위인, 발광 디바이스.
- 청구항 28에 있어서, 상기 비는 1.5 내지 5.5의 범위인, 발광 디바이스.
- 청구항 28에 있어서, 상기 비는 2.0 내지 5.0의 범위인, 발광 디바이스.
- 청구항 28에 있어서, 상기 비는 2.5 내지 4.0의 범위인, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 상기 디바이스의 광도 효율은 1 내지 50 cd/A의 범위이며, 상기 디바이스는 녹색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 상기 디바이스의 광도 효율은 3 내지 40 cd/A의 범위이며, 상기 디바이스는 녹색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 상기 디바이스의 광도 효율은 5 내지 25 cd/A의 범위이며, 상기 디바이스는 녹색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 상기 디바이스의 광도 효율은 5 내지 15 cd/A의 범위이며, 상기 디바이스는 녹색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 상기 디바이스의 광도 효율은 0.2 내지 13 cd/A의 범위이며, 상기 디바이스는 적색 광 또는 청색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 디바이스의 광도 효율은 0.8 내지 11 cd/A의 범위이며, 상기 디바이스는 적색 광 또는 청색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 상기 디바이스의 광도 효율은 1.3 내지 7 cd/A의 범위이며, 상기 디바이스는 적색 광 또는 청색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 1 nit에서 상기 디바이스의 광도 효율은 1.3 내지 4 cd/A의 범위이며, 상기 디바이스는 적색 광 또는 청색 광을 방출하는, 발광 디바이스.
- 청구항 1에 있어서, 상기 비-발광 소광물질은 전자 수송체인, 발광 디바이스.
- 청구항 1에 있어서, 상기 비-발광 소광물질은 금속 착물인, 발광 디바이스.
- 청구항 45에 있어서, 상기 금속은 알루미늄, 베릴륨, 또는 아연인, 발광 디바이스.
- 청구항 45에 있어서, 상기 비-발광 소광물질은 폴리사이클릭 방향족 화합물인, 발광 디바이스.
- 청구항 1에 있어서, 상기 비-발광 소광물질은 1 내지 30 중량%의 상기 엑시톤 소광층을 형성하는, 발광 디바이스.
- 청구항 1에 있어서, 상기 비-발광 소광물질은 3 내지 20 중량%의 상기 엑시톤 소광층을 형성하는, 발광 디바이스.
- 청구항 1에 있어서, 상기 비-발광 소광물질은 5 내지 10 중량%의 상기 엑시톤 소광층을 형성하는, 발광 디바이스.
- 청구항 1에 있어서, 상기 엑시톤 소광층은 1 내지 30 중량%의 상기 비-발광 소광물질을 포함하는 정공 차단층인, 발광 디바이스.
- 제 1 전극;
제 2 전극;
상기 제 1 전극과 상기 제 2 전극 사이에 배치되고 발광물질을 포함하는 발광층; 및
상기 발광층과 상기 제 2 전극 사이에 배치되고 물 분자들을 포함하는 엑시톤 소광층을 포함하는 발광 디바이스로서,
상기 엑시톤 소광층은 상기 발광층에 인접하여 배치되고,
상기 발광물질은 인광 또는 지체된 형광에 의해 방출하는, 발광 디바이스. - 청구항 53에 있어서, 상기 엑시톤 소광층은 디바이스 영역의 1×1012 내지 1×1014 분자들/cm2 의 범위의 농도로 물 분자들을 포함하는, 발광 디바이스.
- 제 1 전극을 피착하는 단계;
제 2 전극을 피착하는 단계;
상기 제 1 전극과 상기 제 2 전극 사이에 배치되고, 제 1 트리플렛 에너지 레벨(T1)을 갖는 발광물질을 포함하는 발광층을 피착하는 단계; 및
상기 발광층과 상기 제 2 전극 사이에 배치되고 제 2 트리플렛 에너지 레벨 (T1)을 갖는 비-발광 소광물질을 포함하는 엑시톤 소광층을 피착하는 단계를 포함하는 발광 디바이스 제조 방법으로서,
상기 엑시톤 소광층은 상기 발광층에 인접하여 배치되고,
상기 발광물질은 인광 또는 지체된 형광에 의해 방출하며,
상기 제 1 트리플렛 에너지 레벨(T1)은 상기 제 2 트리플렛 에너지 레벨 (T1)보다 높은, 방법. - 제 1 전극을 피착하는 단계;
제 2 전극을 피착하는 단계;
상기 제 1 전극과 상기 제 2 전극 사이에 배치되고 발광물질을 포함하는 발광층을 피착하는 단계; 및
상기 발광층과 상기 제 2 전극 사이에 배치되고 물 분자들을 포함하는 엑시톤 소광층을 피착하는 단계를 포함하는 발광 디바이스 제조 방법으로서,
상기 엑시톤 소광층은 상기 발광층에 인접하여 배치되고,
상기 발광물질은 인광 또는 지체된 형광에 의해 방출하는, 방법.
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KR102258067B1 (ko) | 2021-05-31 |
KR20250004595A (ko) | 2025-01-08 |
US20130105777A1 (en) | 2013-05-02 |
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KR102529160B1 (ko) | 2023-05-03 |
KR102118736B1 (ko) | 2020-06-04 |
US20170229671A1 (en) | 2017-08-10 |
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