한국정보디스플레이학회:학술대회논문집
- 2009.10a
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- Pages.196-199
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- 2009
High efficiency multiple quantum well device structure in red phosphorescent OLEDs
- Park, Tae-Jin (Department of Information Display, Kyung Hee University) ;
- Jeon, Woo-Sik (Department of Information Display, Kyung Hee University) ;
- Jang, Jin (Department of Information Display, Kyung Hee University) ;
- Pode, Ramchandra (Department of Physics, Kyung Hee University) ;
- Kwon, Jang-Hyuk (Department of Information Display, Kyung Hee University)
- Published : 2009.10.12
Abstract
We report the multiple quantum well (MQW) structure for highly efficient red phosphorescent OLEDs. Various triplet quantum well devices from a single well to five quantum wells are realized using a wide band-gap hole and electron transporting layers, narrow band-gap host and dopant material, and charge control layers (CCL). The maximum external quantum efficiency of 14.8 % with a two quantum well device structure is obtained, which is the highest value among the red phosphorescent OLEDs using same dopant.