Kinetic Modeling of Transient Photoluminescence from Thermally Activated Delayed Fluorescence,The Journal of Physical Chemistry C

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Kinetic Modeling of Transient Photoluminescence from Thermally Activated Delayed Fluorescence
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2018-12-17 , DOI: 10.1021/acs.jpcc.8b11020
Nils Haase _{1,

2} , Andrew Danos ₃ , Christof Pflumm ₂ , Antonia Morherr ₂ , Patrycja Stachelek ₃ , Amel Mekic _{2,

4} , Wolfgang Brütting ₁ , Andrew P. Monkman ₃

Affiliation

A simplified state model and associated rate equations are used to extract the reverse intersystem crossing and other key rate constants from transient photoluminescence measurements of two high performance thermally activated delayed fluorescence materials. The values of the reverse intersystem crossing rate constant are in close agreement with established methods, but do not require a priori assumption of exponential decay kinetics, nor any additional steady state measurements. The model is also applied to measurements at different temperatures and found to reproduce previously reported thermal activation energies for the thermally activated delayed fluorescence process. Transient absorption measurements provide independent confirmation that triplet decay channels (neglected here) have no adverse effect on the fitting.

中文翻译：

热活化延迟荧光对瞬态光致发光的动力学建模

使用简化的状态模型和关联的速率方程式，从两种高性能热活化延迟荧光材料的瞬态光致发光测量值中提取反向系统间交叉和其他关键速率常数。反向系统间交叉速率常数的值与已建立的方法非常一致，但是不需要先验地假定指数衰减动力学，也不需要任何其他稳态测量。该模型还适用于不同温度下的测量，并且发现该模型可以重现先前报告的热活化延迟荧光过程的热活化能。瞬态吸收测量提供了独立的确认，即三重态衰减通道（此处忽略）对配件没有不利影响。

更新日期：2018-12-18

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