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• W4310142620 abstract "Physical parameters, such as decay rates and photoluminescence (PL) quantum efficiencies, associated with thermally activated delayed fluorescence (TADF) emitters play a critical role in determining the performance of organic light-emitting diodes (OLEDs). Herein, we investigate the impact of TADF decay rates and PL quantum efficiencies on external quantum efficiency (EQE) roll-off. Our analysis reveals that a high EQE with suppressed efficiency roll-off in TADF OLEDs can be achieved by shortening the delayed lifetime with an increasing delayed contribution or by shortening the prompt lifetime with increasing prompt contribution simultaneously. We further show that TADF compounds with long delayed and/or prompt lifetimes can give rise to multiple spin cycling and subsequently result in significant exciton quenching and efficiency roll-off in OLEDs. These results provide universal selection criteria for TADF emitters in OLEDs to concurrently achieve a high maximum EQE and low-efficiency roll-off." @default.
• W4310142620 created "2022-11-30" @default.
• W4310142620 creator A5020907969 @default.
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• W4310142620 creator A5083033193 @default.
• W4310142620 date "2022-11-28" @default.
• W4310142620 modified "2023-09-27" @default.
• W4310142620 title "Correlating Exciton Dynamics of Thermally Activated Delayed-Fluorescence Emitters to Efficiency Roll-Off in OLEDs" @default.
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• W4310142620 doi "https://doi.org/10.1103/physrevapplied.18.054082" @default.
• W4310142620 hasPublicationYear "2022" @default.
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