| 학회 |
한국재료학회 |
| 학술대회 |
2012년 봄 (05/17 ~ 05/18, 무주덕유산리조트) |
| 권호 |
18권 1호 |
| 발표분야 |
제 22회 신소재 심포지엄-그래핀 전자소자 |
| 제목 |
Flexible Organic Light-Emitting Diodes Using Modified Graphene Anodes |
| 초록 |
Graphene films have a strong potential to replace indium tin oxide anodes in organic light-emitting diodes (OLEDs), to date. However, the luminous efficiency of OLEDs with graphene anodes has been limited by a lack of efficient methods to improve the low work function and reduce the sheet resistance of graphene films to the levels required for electrodes. Here, we fabricate flexible OLEDs by modifying the graphene anode to have a high work function and low sheet resistance, and thus achieve extremely high luminous power efficiencies (37.2 lm/W in fluorescent OLEDs, 102.7 lm/W in phosphorescent OLEDs), which are significantly higher than those of optimized devices with an indium tin oxide anode (24.1 lm/W in fluorescent OLEDs, 85.6 lm/W in phosphorescent OLEDs). We also fabricate flexible white OLED lighting devices using the graphene anode. These results demonstrate the great potential of graphene anodes for use in a wide variety of high-performance flexible organic optoelectronics. |
| 저자 |
한태희1, 이영빈2, 최미리1, 우성훈1, 배상훈2, 홍병희3, 안종현2, 이태우1
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| 소속 |
1POSTECH, 2성균관대, 3서울대 |
| 키워드 |
Graphene anode; OLED; Work Function Tuning; Solid State Lighting
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| E-Mail |
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