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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Flexible organic light-emitting diodes using graphene anodes for solid-state lightings

등록일
2012년 2월 16일 17시 16분 05초
접수번호
1261
발표코드
MAT1-5 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
목 16시 : 30분
발표형식
심포지엄
발표분야
재료화학 - Graphene - Recent Advances and Future Outlook
저자 및
공동저자
이태우
포항공과대학교 신소재공학과, Korea
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 remarkable device efficiencies increase the feasibility of using graphene anodes to make extremely high-performance flexible organic optoelectronic devices by overcoming the major drawbacks (low work function and trap formation due to diffusion of indium and tin) of conventional ITO anodes. These results demonstrate the great potential of graphene anodes for use in a wide variety of high-performance flexible organic optoelectronics such as flexible, stretchable full-colour displays and solid-state lighting.

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