Tiago Palmeira , Célia Santos , Mario N. Berberan-Santos
{"title":"富勒烯 C70 和 C70 甲烷和假二氢单加合物的光物理和热激活延迟荧光 (TADF)：比较研究","authors":"Tiago Palmeira , Célia Santos , Mario N. Berberan-Santos","doi":"10.1016/j.orgel.2024.107083","DOIUrl":null,"url":null,"abstract":"<div><p>A comparative study of the photophysical properties of pristine C<sub>70</sub> and two C<sub>70</sub> derivatives, including their thermally activated delayed fluorescence (TADF) is reported. It is observed that the addition of a substituent group to the C<sub>70</sub> cage-like structure changes both the radiative and the nonradiative rate constants, the change being more pronounced for the nonradiative processes (S<sub>1</sub>→S<sub>0</sub> internal conversion and S<sub>1</sub>→T<sub>1</sub> and T<sub>1</sub>→S<sub>0</sub> 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<sub>70</sub>.</p></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":null,"pages":null},"PeriodicalIF":2.7000,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1566119924000946/pdfft?md5=223b1078cc1efff753252dcaf127415b&pid=1-s2.0-S1566119924000946-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Photophysics and thermally activated delayed fluorescence (TADF) of fullerene C70 and C70 methano and pseudodihydro monoadducts: A comparative study\",\"authors\":\"Tiago Palmeira , Célia Santos , Mario N. Berberan-Santos\",\"doi\":\"10.1016/j.orgel.2024.107083\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>A comparative study of the photophysical properties of pristine C<sub>70</sub> and two C<sub>70</sub> derivatives, including their thermally activated delayed fluorescence (TADF) is reported. It is observed that the addition of a substituent group to the C<sub>70</sub> cage-like structure changes both the radiative and the nonradiative rate constants, the change being more pronounced for the nonradiative processes (S<sub>1</sub>→S<sub>0</sub> internal conversion and S<sub>1</sub>→T<sub>1</sub> and T<sub>1</sub>→S<sub>0</sub> 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<sub>70</sub>.</p></div>\",\"PeriodicalId\":399,\"journal\":{\"name\":\"Organic Electronics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.7000,\"publicationDate\":\"2024-06-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S1566119924000946/pdfft?md5=223b1078cc1efff753252dcaf127415b&pid=1-s2.0-S1566119924000946-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Organic Electronics\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1566119924000946\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Organic Electronics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1566119924000946","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Photophysics and thermally activated delayed fluorescence (TADF) of fullerene C70 and C70 methano and pseudodihydro monoadducts: A comparative study
A comparative study of the photophysical properties of pristine C70 and two C70 derivatives, including their thermally activated delayed fluorescence (TADF) is reported. It is observed that the addition of a substituent group to the C70 cage-like structure changes both the radiative and the nonradiative rate constants, the change being more pronounced for the nonradiative processes (S1→S0 internal conversion and S1→T1 and T1→S0 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 C70.
期刊介绍：
Organic Electronics is a journal whose primary interdisciplinary focus is on materials and phenomena related to organic devices such as light emitting diodes, thin film transistors, photovoltaic cells, sensors, memories, etc.
Papers suitable for publication in this journal cover such topics as photoconductive and electronic properties of organic materials, thin film structures and characterization in the context of organic devices, charge and exciton transport, organic electronic and optoelectronic devices.
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