研究目的
To extract the reverse intersystem crossing and other key rate constants from transient photoluminescence measurements of two high performance thermally activated delayed fluorescence materials.
研究成果
The kinetic model accurately describes the emission decay over several orders of magnitude and provides reliable values for the reverse intersystem crossing rate constants. The model can be expanded to include triplet decay and rISC rate distributions, making it a versatile tool for characterizing new TADF materials.
研究不足
The model does not consider triplet decay channels, which may be significant in other materials or at low temperatures. The initial contribution of 1LE emission at early times is not fully accounted for in the model.
1：Experimental Design and Method Selection:
A simplified state model and associated rate equations are used to analyze transient photoluminescence measurements.
2：Sample Selection and Data Sources:
Two high performance thermally activated delayed fluorescence materials, DDMA-TXO2 and DPTZ-DBTO2, in solid state.
3：List of Experimental Equipment and Materials:
Transient photoluminescence measurement setup, transient absorption apparatus.
4：Experimental Procedures and Operational Workflow:
Time-resolved photoluminescence measurements at different temperatures, transient absorption measurements.
5：Data Analysis Methods:
Numerical solution of the rate equations using the SciPy library in Python, fitting of the singlet population to normalized transient photoluminescence data.
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