期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 1, 页码 47-52出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b16887
关键词
TADF polymer; triplet concentration quenching interfacial exciplex; efficiency roll-off; solution-processed OLEDs
资金
- National Key Basic Research and Development Program of China [2015CB655001, 2014CB643504]
- National Key R&D Program of China [2016YFB0401001]
- National Natural Science Foundation of China [51325303, 51473162, 51773195, 21334006, 21404101]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB12030200]
Solution-processed organic light-emitting diodes (s-OLED) consisting of TAPC/TmPyPB interfacial exciplex host and polymer PAPTC TADF emitter are prepared, simultaneously displaying ultralow voltages (2.50/2.91/3.51/4.91 V at luminance of 1/100/1000/1000 cd m(-2)), high efficiencies (14.9%, 50.1 lm W-1), and extremely low roll-off rates (J(50) of 63.16 mA cm(-2), L-50 of ca. 15000 cd m(-2)). Such performance is distinctly higher than that of pure-PAPTC s-OLED. Compared to pure-PAPTC, the advanced emissive layer structure of TAPC:PAPTC/TmPyPB is unique in much higher PL quantum yield (79.5 vs 36.3%) and nearly 4-fold enhancement in k(RISC) of the PAPTC emitter to 1.48 X 10(7) s(-1).
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