Thermally activated delayed fluorescence with 7% external quantum efficiency from a light-emitting electrochemical cell

Petter Lundberg, Youichi Tsuchiya, E. Mattias Lindh, Shi Tang, Chihaya Adachi and Ludvig Edman ()
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Petter Lundberg: Umeå University
Youichi Tsuchiya: Kyushu University
E. Mattias Lindh: Umeå University
Shi Tang: Umeå University
Chihaya Adachi: Kyushu University
Ludvig Edman: Umeå University

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract We report on light-emitting electrochemical cells, comprising a solution-processed single-layer active material and air-stabile electrodes, that exhibit efficient and bright thermally activated delayed fluorescence. Our optimized devices delivers a luminance of 120 cd m−2 at an external quantum efficiency of 7.0%. As such, it outperforms the combined luminance/efficiency state-of-the art for thermally activated delayed fluorescence light-emitting electrochemical cells by one order of magnitude. For this end, we employed a polymeric blend host for balanced electrochemical doping and electronic transport as well as uniform film formation, an optimized concentration (

Date: 2019
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DOI: 10.1038/s41467-019-13289-w

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