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학술발표회초록보기

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제109회 대한화학회 학술발표회, 총회 및 기기전시회 안내 The relationship between the device performance and hole mobility of host materials in mixed host system for deep blue phosphorescent organic light emitting devices

등록일
2012년 2월 14일 14시 51분 44초
접수번호
0259
발표코드
IND.P-85 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 25일 (수요일) 18:00~21:00
발표형식
포스터
발표분야
공업화학
저자 및
공동저자
위경량, 이종대1, 강상욱
고려대학교 소재화학과, Korea
1조선대학교 화학과, Korea
We report on the systematic investigation of the relationship between hole mobility of host materials and device performance to maximize the power efficiency. Three different materials with different hole mobility were used as host materials of iridium(III)[bis(4,6-difluorophenyl)pyridinato-N,C2′]tetrakis(1-pyrazolyl)borate (FIr6) based deep blue phosphorescent organic light-emitting device (PHOELD). Host material, tris(4-(N-carbazolyl)phenyl)methylsilane (MCBP), with higher hole mobility (1.1 × 10?3 cm2 V?1 s?1), can accommodate more electron current carried by an n-type host, bis(4-(4,5-diphenyl-4H-1,2,4-triazol-3-yl)phenyl)dimethylsilane (SiTAZ), than the other p-type hosts with lower hole mobility, maintaining the charge balance between hole and electron current. As a result, the optimized device shows high external quantum efficiency (EQE) of 19.0%, high power efficiency of 23.5 lm/W, low efficiency roll off, and deep blue color coordinates of (0.15, 0.23).

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