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Sublimable cationic Ir(iii) phosphor using chlorine as a counterion for high-performance monochromatic and white
Lei Ding1, Chun-Xiu Zang, Hui-Ting Mao
1Institute of Functional Material Chemistry and National & Local United Engineering Lab for Power Battery, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China. shangg187@nenu.edu.cn sunhz335@nenu.edu.cn zmsu@nenu.edu.cn.
Abstract:
Different from the previous design strategy, herein, a cationic Ir(iii) complex ([(ptbi)2Ir(bisq)]Cl) with a small chlorine as the counterion was synthesized, which realized the formation of a solid film via a vacuum-deposition process. The white OLED, employing it as an orange-emitting layer, achieved excellent performances with a brightness of 50 122 cd m-2, a CE of 25.5 cd A-1, an EQE of 13.1%, accompanied by a low CE efficiency roll-off of 4.7%. These are the best results among evaporated cationic Ir(iii)-based white OLEDs reported so far.
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