한국정보디스플레이학회:학술대회논문집
- 2008.10a
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- Pages.496-498
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- 2008
Highly Efficient Green Phosphorescent Organic Light Emitting Diodes
- Lee, Se-Hyung (Department of Materials Science and Engineering and OLED Center, Seoul National University) ;
- Park, Hyung-Dol (Department of Materials Science and Engineering and OLED Center, Seoul National University) ;
- Kang, Jae-Wook (Department of Materials Science and Engineering and OLED Center, Seoul National University) ;
- Kim, Hyong-Jun (Department of Materials Science and Engineering and OLED Center, Seoul National University) ;
- Kim, Jang-Joo (Department of Materials Science and Engineering and OLED Center, Seoul National University)
- Published : 2008.10.13
Abstract
We have developed green phosphorescent organic light-emitting diodes (OLEDs) with high quantum efficiency. Wide-energy-gap material, 1,1-bis[(di-4-tolylamino) phenyl]cyclohexane (TAPC), with high triplet energy level was used as a hole transporting layer. Electrophosphorescent devices fabricated using TAPC as a hole-transporting layer and N,N'-dicarbazolyl-4,4'-biphenyl (CBP) doped with fac-tris(2-phenylpyridine) iridium [Ir(ppy)3] as the emitting layer showed the maximum external quantum efficiency (