scholarly journals Deep-blue thermally activated delayed fluorescence (TADF) emitters for light-emitting electrochemical cells (LEECs)

2017 ◽  
Vol 5 (7) ◽  
pp. 1699-1705 ◽  
Author(s):  
Michael Y. Wong ◽  
Maria-Grazia La-Placa ◽  
Antonio Pertegas ◽  
Henk J. Bolink ◽  
Eli Zysman-Colman
Keyword(s):  
Small Molecule ◽  
Electrochemical Cell ◽  
Delayed Fluorescence ◽  
Electrochemical Cells ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Deep Blue

Two cationic deep blue thermally activated delayed fluorescence (TADF) emitters (imCzDPS and imDPADPS) were designed and synthesized as small molecule organic emitters for light-emitting electrochemical cell (LEEC) devices.

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

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Petter Lundberg ◽  
Youichi Tsuchiya ◽  
E. Mattias Lindh ◽  
Shi Tang ◽  
Chihaya Adachi ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
External Quantum Efficiency ◽  
Active Material ◽  
Fluorescence Emission ◽  
Single Layer ◽  
Delayed Fluorescence ◽  
Electrochemical Cells ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated

AbstractWe 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 (<1 mass%) of guest for complete host-to-guest energy transfer at minimized aggregation and efficient emission, and an appropriate concentration of an electrochemically stabile electrolyte for desired doping effects. The generic nature of our approach is manifested in the attainment of bright and efficient thermally activated delayed fluorescence emission from three different light-emitting electrochemical cells with invariant host:guest:electrolyte number ratio.

scholarly journals Polymer Featuring Thermally Activated Delayed Fluorescence as Emitter in Light-Emitting Electrochemical Cells

2020 ◽  
Vol 11 (15) ◽  
pp. 6227-6234
Author(s):  
Petter Lundberg ◽  
Qiang Wei ◽  
Ziyi Ge ◽  
Brigitte Voit ◽  
Sebastian Reineke ◽  
...  
Keyword(s):  
Delayed Fluorescence ◽  
Electrochemical Cells ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated

scholarly journals Deep-Blue Oxadiazole-Containing Thermally Activated Delayed Fluorescence Emitters for Organic Light-Emitting Diodes

2018 ◽  
Vol 10 (39) ◽  
pp. 33360-33372 ◽  
Author(s):  
Michael Y. Wong ◽  
Simonas Krotkus ◽  
Graeme Copley ◽  
Wenbo Li ◽  
Caroline Murawski ◽  
...  
Keyword(s):  
Light Emitting Diodes ◽  
Delayed Fluorescence ◽  
Organic Light Emitting Diodes ◽  
Thermally Activated Delayed Fluorescence ◽  
Light Emitting ◽  
Thermally Activated ◽  
Deep Blue ◽  
Organic Light
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