| 학회 |
한국고분자학회 |
| 학술대회 |
2007년 가을 (10/11 ~ 10/12, 일산킨텍스) |
| 권호 |
32권 2호 |
| 발표분야 |
기능성 고분자 |
| 제목 |
Efficient, Color Stable White Organic Light-Emitting Diode Based on High Energy Level Dopant |
| 초록 |
The authors have fabricated efficient and color stable white organic light-emitting diodes (WOLEDs) based on blue, yellowish green and red phosphorescent dye doped triple emissive layers. Firpic and Ir(piq)3 were used as the blue and red dopants, respectively, and newly synthesized, Ir(chpy)3 or Ir(mchpy)3 was used as the yellowish-green dopant. The devices showed high external quantum efficiency of 11.5% and color rendering index of 87%. Moreover they exhibited remarkable color stability with the variation of Commission Internationale de l’Eclairage (CIE) chromaticity coordinates less than (0.02, 0.01) between 10 cd/m2 and 5,000 cd/m2. The color stability is interpreted based on the energy level alignment of the dopant and the host of the middle layer, where the green dopants have higher HOMO and LUMO energy levels than the host material of CBP. |
| 저자 |
박영서1, 강재욱2, 강동민3, 박종원3, 권순기3, 김장주1
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| 소속 |
1서울대, 2한국기계(연), 3경상대 |
| 키워드 |
white OLED; WOLED; color stability; high energy level dopant
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| E-Mail |
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