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학술지 Optical and Structural Approaches for Improved Luminance Distribution and Enhanced Efficiency of Organic Light Emitting Diodes
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저자
주철웅, 이근수, 이종희, 조현수, 신진욱, 조남성, 문제현
발행일
201707
출처
Journal of Luminescence, v.187, pp.433-440
ISSN
0022-2313
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.jlumin.2017.03.057
협약과제
16ZB1300, 초저가 플렉서블 Lighting Surface 기술 개발, 유병곤
초록
We combined cavity based optical method and polymer based structural approach to achieve efficiency enhancement and widened luminance distribution of organic light emitting diodes. Cavity method was implemented by adjusting the thickness of the hole transport layer and using a ITO-Metal-ITO transparent electrode. Utilizing the lateral phase separation of immiscible polystyrene/ polyethylene glycol binary system, we have fabricated an aperiodic protruding structure. The application of the two methods yielded two fold efficiency enhancement and widened luminance distribution. To be specific the external quantum efficiency increased from 8.9% to 17.9%.
키워드
Light extraction, Microcavity, Organic light emitting diode (OLED), Polymer phase separation
KSP 제안 키워드
Binary system, Cavity method, External Quantum Efficiency, Lateral phase separation, Optical method, Organic light-emitting diodes(OLEDS), Poly (ethylene glycol)(PEG), Polymer phase separation, efficiency enhancement, enhanced efficiency, hole transport layer