화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2015년 봄 (04/08 ~ 04/10, 대전컨벤션센터)
권호 40권 1호
발표분야 대학원생 구두발표 (영어발표, 발표15분)
제목 Synthesis of high triplet energy host materials for blue phosphorescent organic light-emitting diodes.
초록 In this work, dibenzothiophene derivatives were synthesized as hole transport type host materials for blue phosphorescent organic light-emitting diodes (OLEDs). The new dibenzothiophene based host materials showed planar core structure, triplet energy of higher than 2.8 eV, and excellent device performances as the host materials in blue phosphorescent OLEDs. The HOMO energy levels of host materials were -5.85 eV and -5.80 eV, while the LUMO energy levels of host materials were -2.09 eV and -2.26 eV, respectively. Maximum quantum efficiency of blue phosphorescent devices was 27.8% at a 10% doping concentration and the color coordinate of the device was (0.18, 0.38) at 1000 cd/m2. It was found that the dibenzothiophene based hole transport type host design was effective to improve the device performances of blue phosphorescent OLEDs.
저자 김지한1, 이준엽2, 황석호1
소속 1단국대, 2성균관대
키워드 Host materials; OLED
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