KR100924145B1 - 유기전계발광소자 및 이의 제조방법 - Google Patents
유기전계발광소자 및 이의 제조방법 Download PDFInfo
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- KR100924145B1 KR100924145B1 KR1020080054283A KR20080054283A KR100924145B1 KR 100924145 B1 KR100924145 B1 KR 100924145B1 KR 1020080054283 A KR1020080054283 A KR 1020080054283A KR 20080054283 A KR20080054283 A KR 20080054283A KR 100924145 B1 KR100924145 B1 KR 100924145B1
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- light emitting
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- 238000000034 method Methods 0.000 title claims abstract description 19
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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
- H10K50/12—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers comprising dopants
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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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/18—Light sources with substantially two-dimensional radiating surfaces characterised by the nature or concentration of the activator
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/12—Light sources with substantially two-dimensional radiating surfaces
- H05B33/14—Light sources with substantially two-dimensional radiating surfaces characterised by the chemical or physical composition or the arrangement of the electroluminescent material, or by the simultaneous addition of the electroluminescent material in or onto the light source
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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
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K2101/00—Properties of the organic materials covered by group H10K85/00
- H10K2101/30—Highest occupied molecular orbital [HOMO], lowest unoccupied molecular orbital [LUMO] or Fermi energy values
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
LUMO 에너지 준위 (eV) | HOMO 에너지 준위 (eV) | 에너지 밴드갭 (eV) | |
호스트 | -3.2 | -5.4 | 2.2 |
발광 도펀트 | -3.4 | -5.5 | 2.1 |
실험예 1의 보조 도펀트 | -3.04 | -5.5 | 2.46 |
실험예 2의 보조 도펀트 | -2.97 | -5.6 | 2.63 |
정공 이동도 (㎠/V·s) | 전자 이동도 (㎠/V·s) | 구동전압 (V) | 효율(cd/A) | 색좌표 (CIE x,CIE y) | |
실험예 1 | 7.77216*10-7 | 4.47519*10-6 | 6.4 | 5.2 | (0.658, 0.341) |
실험예 2 | 3.82615*10-6 | 7.30065*10-6 | 6.1 | 5.4 | (0.663, 0.336) |
비교예 1 | 2.37209*10-4 | 1.42814*10-5 | 6.0 | 5.3 | (0.660, 0.338) |
구동전압 (V) | 효율(cd/A) | 색좌표 (CIE x) | |
실험예 3 | 6.9 | 5.4 | 0.661 |
실험예 4 | 6.1 | 5.5 | 0.650 |
비교예 2 | 6.4 | 5.5 | 0.662 |
Claims (14)
- 제 1 전극;상기 제 1 전극 상에 위치하며, 호스트, 발광 도펀트, 및 보조 도펀트를 포함하는 발광층; 및상기 발광층 상에 위치하는 제 2 전극을 포함하며,상기 보조 도펀트의 밴드갭 에너지는 상기 호스트의 밴드갭 에너지보다 더 큰 것을 특징으로 하는 유기전계발광소자.
- 제 1 항에 있어서,상기 보조 도펀트의 최고 점유 분자 궤도 에너지 준위의 절대값은 상기 호스트의 최고 점유 분자 궤도 에너지 준위의 절대값과 같거나 큰 것을 특징으로 하는 유기전계발광소자.
- 제 2 항에 있어서,상기 발광층의 정공 이동도는 상기 호스트 및 상기 발광 도펀트만으로 이루어진 층의 정공 이동도보다 작은 값을 가지는 것을 특징으로 하는 유기전계발광소자.
- 제 1 항에 있어서,상기 보조 도펀트의 최저 비점유 분자 궤도 에너지 준위의 절대값은 상기 호스트의 최저 비점유 분자 궤도 에너지 준위의 절대값과 같거나 작은 것을 특징으로 하는 유기전계발광소자.
- 제 4 항에 있어서,상기 발광층의 전자 이동도는 상기 호스트 및 상기 발광 도펀트만으로 이루어진 층의 전자 이동도보다 작은 값을 가지는 것을 특징으로 하는 유기전계발광소자.
- 제 1 항에 있어서,상기 발광층은 상기 호스트, 상기 발광 도펀트, 및 상기 보조 도펀트가 공증착된 단일층인 것을 특징으로 유기전계발광소자.
- 제 1 항에 있어서,상기 보조 도펀트는 상기 발광층의 두께 방향에서 일부 영역에만 포함되어 있는 것을 특징으로 하는 유기전계발광소자.
- 제 7 항에 있어서,상기 발광층은 상기 호스트 및 상기 발광 도펀트가 공증착된 제 1 층; 및상기 호스트, 상기 발광 도펀트, 및 상기 보조 도펀트가 공증착된 제 2 층이 적층된 구조인 것을 특징으로 하는 유기전계발광소자.
- 제 7 항에 있어서,상기 발광층은 상기 호스트 및 상기 발광 도펀트가 공증착된 제 1 층; 및상기 호스트 및 상기 보조 도펀트가 공증착된 제 2 층이 적층된 구조인 것을 특징으로 하는 유기전계발광소자.
- 제 1 항에 있어서,상기 발광 도펀트의 밴드갭 에너지는 상기 호스트의 밴드갭 에너지보다 작은 것을 특징으로 하는 유기전계발광소자.
- 제 1 전극을 형성하고,상기 제 1 전극 상에 호스트, 발광 도펀트, 및 보조 도펀트를 포함하는 발광층을 형성하고,상기 발광층 상에 제 2 전극을 형성하는 것을 포함하며,상기 보조 도펀트의 밴드갭 에너지는 상기 호스트의 밴드갭 에너지보다 더 큰 것을 특징으로 하는 유기전계발광소자의 제조방법.
- 제 11 항에 있어서,상기 발광층은 상기 호스트, 상기 발광 도펀트, 및 상기 보조 도펀트를 공증착하여 단일층으로 형성하는 것을 특징으로 유기전계발광소자의 제조방법.
- 제 11 항에 있어서,상기 발광층은 상기 호스트 및 상기 발광 도펀트를 공증착하여 형성된 제 1층 및 상기 호스트, 상기 발광 도펀트, 및 상기 보조 도펀트를 공증착하여 형성된 제 2 층을 포함하도록 형성하는 것을 특징으로 하는 유기전계발광소자의 제조방법
- 제 11 항에 있어서,상기 발광층은 상기 호스트 및 상기 발광 도펀트가 공증착하여 형성된 제 1 층 및 상기 호스트 및 상기 보조 도펀트가 공증착된 형성된 제 2 층을 포함하도록 형성하는 것을 특징으로 하는 유기전계발광소자의 제조방법.
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JP2009138525A JP4889765B2 (ja) | 2008-06-10 | 2009-06-09 | 有機電界発光素子及び有機電界発光素子の製造方法 |
US14/220,938 US9263692B2 (en) | 2008-06-10 | 2014-03-20 | Organic light emitting diode having emission layer with host, emitting dopant and auxiliary dopant and method of fabricating the same |
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US8692232B2 (en) | 2014-04-08 |
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