| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 봄 (04/12 ~ 04/13, 대전컨벤션센터) |
| 권호 |
37권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Enhanced Charge Transport of Organic Light Emitting Diodes Using ZnO/N-CNT Nanocomposites |
| 초록 |
Currently used wide-bandgap metal oxides have limitations in the charge transport enhancement due to low electrical conductivities. We present the notable electrical conductivity enhancement of ZnO charge transport layers by dispersing a small amount of doped CNTs and the improved device performance of OLEDs. Among various undoped or doped CNTs, Nitrogen-doped CNTs showed a lowered work function which is well-matched with the conduction band of ZnO. Consequently, ZnO/N-CNT(0.08 wt%) nanocomposites transport layer showed a five-fold enhancement of electron mobility, while maintaining the other properties of pure ZnO. The inverted OLEDs employing ZnO/N-CNT electron transport layer could facilitate balanced electron/hole injection and, thus, more than two-fold enhancement of maximum luminance and efficiency. This enhancement of charge mobility enabled by work function tunable, chemically doped CNTs would be adaptable for various charge transport materials with different energy levels. |
| 저자 |
박형일1, 박지선1, 이주민1, 황선각1, 이선화1, 이현정2, 이보람2, 김지선1, 유승협1, 송명훈2, 김상욱1
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| 소속 |
1KAIST, 2UNIST |
| 키워드 |
organic light-emitting diode; ZnO transport layer; Doped CNT; charge mobility
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| E-Mail |
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