期刊
JOURNAL OF PHYSICAL CHEMISTRY A
卷 125, 期 36, 页码 8074-8089出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpca.1c04056
关键词
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资金
- EPSRC
- JSPS Core to Core grants (JSPS Core-to-Core Program) [EP/R035164/1]
- Program for Building Regional Innovation Ecosystems of the Ministry of Education, Culture, Sports, Science and Technology, Japan, JST ERATO [JPMJER1305]
- JSPS KAKENHI [JP20H05840]
- Kyulux Inc.
- EPSRC [EP/R035164/1] Funding Source: UKRI
The photophysical analysis of TADF materials is crucial for understanding their stability and performance. A new method has been demonstrated in this report to determine rate constants without additional assumptions, providing a comprehensive understanding of the photophysics of diverse TADF emitters.
The photophysical analysis of thermally activated delayed fluorescence (TADF) materials has become instrumental for providing insights into their stability and performance, which is not only relevant for organic light-emitting diodes but also for other applications such as sensing, imaging, and photocatalysis. Thus, a deeper understanding of the photophysics underpinning the TADF mechanism is required to push materials design further. Previously reported analyses in the literature of the kinetics of the various processes occurring in a TADF material rely on several a priori assumptions to estimate the rate constants for forward and reverse intersystem crossing. In this report, we demonstrate a method to determine these rate constants using a threestate model together with a steady-state approximation and, importantly, no additional assumptions. Further, we derive the exact rate equations, greatly facilitating a comparison of the TADF properties of structurally diverse emitters and providing a comprehensive understanding of the photophysics of these systems.
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