Stable pure-blue hyperfluorescence organic light-emitting diodes with high-efficiency and narrow emission

Chin-Yiu Chan, Masaki Tanaka, Yi-Ting Lee, Yiu-Wing Wong, Hajime Nakanotani, Takuji Hatakeyama, and Chihaya Adachi

Nature Photonics, 15, 203–207, (2021)

https://www.nature.com/articles/s41566-020-00745-z

It is challenging to produce stable blue OLEDs with high efficiency and color purity. The researchers fabricated a new OLED showing pure-blue emission with high efficiency and stability. Their optimized device consists of a 2-unit stacked tandem OLED with a hyperfluorescent emitting layer. Setfos was used to fit angular photoluminescence data and determine the orientation of the dipoles of the TADF emitter.

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High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence

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The Optical Origin of Near-Unity External Quantum Efficiencies in Perovskite Solar Cells