有机发光二极管
材料科学
共发射极
荧光
量子产额
光电子学
量子效率
光致发光
二极管
电致发光
光学
纳米技术
物理
图层(电子)
作者
Jinho Park,Ki Ju Kim,Jong Tae Lim,Tae‐Kyung Kim,Jun Yeob Lee
标识
DOI:10.1002/adma.202108581
摘要
In this study, a multiple resonance (MR) type blue emitter is synthesized, characterized, and evaluated for highly efficient and stable blue fluorescent organic light-emitting diodes (OLEDs). The MR blue fluorescent emitter has a di-tert-butyl benzene substituent in the MR core structure to minimize quenching mechanisms by intermolecular interaction. The emitter shows a high photoluminescence quantum yield and small full width at half maximum of 22 nm, which realize high external quantum efficiency (EQE) of 11.4% in the single unit OLED and device lifetime up to 95% of the initial luminance (LT95 ) of 208 h at 1000 cd m-2 and over 10 000 h at 100 cd m-2 . The optimized tandem device of the new blue emitter achieves high EQE over 25% and extremely long LT95 of over 500 h at 1000 cd m-2 and 30 000 h at 100 cd m-2 . The lifetime of this work is one of the best data of blue OLED lifetime reported in the literature.
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