화학공학소재연구정보센터
학회 한국고분자학회
학술대회 2019년 봄 (04/10 ~ 04/12, 부산컨벤션센터(BEXCO))
권호 44권 1호
발표분야 분자전자 부문위원회 I
제목 Blue phosphorescence organic light emitting diodes with trifluorosulfonyl-substituted iridium complexes for preferential horizontal orientation
초록 New blue iridium complexes consist of trifluoromethyl sulfonyl substituent at 3 position on the phenyl ring, and methyl group at the 4 position of the pyridine group as the main ligand and a picolinate (pic), a picolinate with 3-methylpyridine (mpic) as the ancillary ligand for blue phosphorescence organic light emitting diodes (PHOLEDs) have been synthesized. The device with mpic dopant showed higher current, external quantum, and power efficiency of 7.17 cd/A, 3.7%, and 5.29 lm/W compared to that with the pic dopant (4.03 cd/A, 2.78%, and 3.57 lm/W). These improved properties could be explained by the outcoupling effect by relatively horizontally orientated emitter and preventing self-quenching due to triplet-triplet annihilation. This work was supported by National Research Foundation(NRF-2016R1C1B1011745) of Korea grant funded by the Korea government and Pohang University of Science and Technology.
저자 손선영1, 정성준1, 권순기2, 김윤희2
소속 1포스텍, 2경상대
키워드 OLEDs; Phosphorescence; Blue Emitter; Trifluorosulfonyl
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