1. A symmetric nonpolar blue AIEgen as nondoped fluorescent OLED emitter with low efficiency roll-off.
- Author
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Fei, Nannan, Wei, Qiang, Cao, Liang, Bai, Yongqi, Ji, Honglei, Peng, Ruixiang, Huang, Like, Shiyou, Hao, and Ge, Ziyi
- Subjects
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DELAYED fluorescence , *ORGANIC light emitting diodes , *QUANTUM efficiency , *THERMAL stability , *BLUE - Abstract
Blue emitters are necessary for achieving full-color displaying OLEDs, however, most blue emitters show low efficiency, short lifetime or serious efficiency roll-off, hindering the development of OLED techniques. In this research, a nonpolar symmetric aggregation-induced emission (AIE) emitter was designed and constructed through facile steps, with the triphenylamine-end, anthracene-spacer and tetraphenylethene (TPE)-center. This emitter exhibited good thermal stability and aggregation-enhanced emission (AEE) characteristics, based on which non-doped blue OLED device was readily fabricated with the maximum external quantum efficiency (EQE) of 2.7% and also with no efficiency roll-off even at 1000 cd m−2, indicative of high efficiency and good stability as fluorescent emitter. Image 1072006 • This emitter with good thermal stability and aggregation-enhanced emission (AEE) characteristics. • Non-doped blue OLED device was fabricated with the maximum external quantum efficiency (EQE) of 2.7%. • Non-doped blue OLED device with no efficiency roll-off even at 1000 cd m−2. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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