Efficient white organic light emission by single emitting layer
| Autor: | Gi-Wook Kang, Namheon Lee, Jongtae Lim, Chi-Sun Hwang, Yong-Hae Kim, Young Wook Ko, Bong-Chul Kim, Choong-Yong Sohn, Yoon-Ho Song, Young-Joo Ahn, Changhee Lee, Choong-Heui Chung, Jin Ho Lee |
|---|---|
| Rok vydání: | 2003 |
| Předmět: |
business.industry
Chemistry Doping Metals and Alloys Analytical chemistry Quantum yield Surfaces and Interfaces Electroluminescence Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Organic semiconductor law Materials Chemistry Optoelectronics Quantum efficiency Light emission Chromaticity business Light-emitting diode |
| Zdroj: | Thin Solid Films. 426:246-249 |
| ISSN: | 0040-6090 |
| DOI: | 10.1016/s0040-6090(03)00007-5 |
| Popis: | Stable organic white light-emitting diodes are successfully fabricated by a single organic white emitting layer, which is Bis (2-methyl-8-quinolinato) (triphenylsiloxy) aluminum (III) (SAlq) doped red fluorescent dye of 4-(dicyanomethylene)-2- tert -butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4 H -pyran (DCJTB). The incomplete energy transfer from blue-emitting SAlq to red-emitting DCJTB enables to obtain a stable white balanced light-emission by the DCJTB doping concentration of 0.5%. A device with the structure of ITO/TPD (50 nm)/SAlq:DCJTB (30 nm, 0.5%)/Alq 3 (20 nm)/LiF (0.5 nm)/Al (110 nm) shows maximum luminance of 20 400 cd/m 2 at 810 mA/cm 2 , external quantum efficiency of 2% at 200 cd/m 2 (∼3 mA/cm 2 ), power efficiency of 2.3 lm/W at 67 cd/m 2 (∼1 mA/cm 2 ), and a Commission Internationale de l'Eclairage chromaticity coordinates of (0.34, 0.39) at 1.8 mA/cm 2 to (0.31, 0.38) at 36 mA/cm 2 . |
| Databáze: | OpenAIRE |
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