Photophysics and thermally activated delayed fluorescence (TADF) of fullerene C70 and C70 methano and pseudodihydro monoadducts: A comparative study

被引：1
|
作者：
Palmeira, Tiago [1 ]
Santos, Celia [2 ]
Berberan-Santos, Mario N. [1 ]
机构：
[1] Univ Lisbon, iBB Inst Bioengn & Biosci, Inst Super Tecn, P-1049001 Lisbon, Portugal
[2] ASAE, Campus Lumiar, P-1649038 Lisbon, Portugal
来源：
ORGANIC ELECTRONICS | 2024年 / 131卷
关键词：
Fullerene C 70; Fullerene C 70 derivatives; Thermally activated delayed fluorescence; (TADF); Non -radiative processes; Molecular photophysics; C-70; C-60; DERIVATIVES; SPECTRA; PC71BM; STATES;
D O I：
10.1016/j.orgel.2024.107083
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A comparative study of the photophysical properties of pristine C 70 and two C 70 derivatives, including their thermally activated delayed fluorescence (TADF) is reported. It is observed that the addition of a substituent group to the C 70 cage -like structure changes both the radiative and the nonradiative rate constants, the change being more pronounced for the nonradiative processes (S 1 -> S 0 internal conversion and S 1 -> T 1 and T 1 -> S 0 intersystem crossings). A new method of TADF analysis (global analysis of time -resolved and steady-state data) is presented and applied. Both derivatives are found to display a less efficient TADF when compared with C 70 .
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页数：6
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