期刊
APPLIED PHYSICS LETTERS
卷 115, 期 26, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.5139481
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资金
- National Natural Science Foundation of China [61420106002, 51373189, 21772209, 91833304]
- National Key Research and Development Project [2016YFB0401004]
- National Program for Support of Top-notch Young Professionals
High efficiency white organic light-emitting diodes (WOLEDs) with simple device architecture are desirable for next-generation light sources. However, it is still challenging in the construction of high-performance WOLEDs with a simple device structure. Based on a thermally activated delayed fluorescence (TADF) blue emitter 2SPAc-MPM and a TADF yellow emitter TXO-TPA, high performance two-color WOLEDs with simple device architecture are demonstrated. Benefiting from efficient energy transfer and wide coverage over the visible spectrum, optimized WOLED devices that have a single emitting layer (s-EML) provide a maximum color rendering index (CRI) and maximum external quantum efficiency (EQE) of 78.1 and 21.8%, respectively. More importantly, with multiple emitting layers (m-EMLs), a maximum EQE of 14.5% and a high CRI of 90.7 can be achieved. These results are among the best for the two-color WOLEDs with two TADF emitters.
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