Jun-Feng Zheng, Xiaofan Cheng, Yun-chong Ge, Jiaxin Gong, P. Xu
{"title":"Synthesis, Phase Structure and Photophysical Property of A Liquid Crystalline Molecule with High Emission Efficiency both in Solution and Solid State","authors":"Jun-Feng Zheng, Xiaofan Cheng, Yun-chong Ge, Jiaxin Gong, P. Xu","doi":"10.37188/cjl.20220428","DOIUrl":"https://doi.org/10.37188/cjl.20220428","url":null,"abstract":"","PeriodicalId":10121,"journal":{"name":"Chinese Journal of Luminescence","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69943056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Meng Li, Yang Sun, Xin Ji, Fei Gao, Feifei Qin, Gangyi Zhu
{"title":"Spectral Regulation of InP Light Emitting Diode by Disk Size","authors":"Meng Li, Yang Sun, Xin Ji, Fei Gao, Feifei Qin, Gangyi Zhu","doi":"10.37188/cjl.20220434","DOIUrl":"https://doi.org/10.37188/cjl.20220434","url":null,"abstract":"","PeriodicalId":10121,"journal":{"name":"Chinese Journal of Luminescence","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69943676","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Optical Properties of CsPbxSn1-xBr3/a-ZrP Perovskite Quantum Dots for White Light-emitting Diodes","authors":"Chunxia Wu, Ruijun Jia","doi":"10.37188/cjl.20230056","DOIUrl":"https://doi.org/10.37188/cjl.20230056","url":null,"abstract":"","PeriodicalId":10121,"journal":{"name":"Chinese Journal of Luminescence","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69945575","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
： Thermally activated delayed fluorescence （ TADF ） materials with distinct electron donor and acceptor （ D - A ） segments can achieve theoretically 100% internal quantum efficiencies via the reverse intersystem crossing （ RISC ） process ， thus receiving tremendous attention in lighting ， display ， and biomedical fields. Generally ， D - A systems with intramolecular charge transfer （ ICT ） characteristics minimize singlet - triplet energy gap （ Δ E S - T ） by having molecular con⁃ formations twisted ， so that the RISC process takes place rapidly. Once the dihedral angle of D - A segments in the excit⁃ ed molecular conformation is further twisted ， approaching 90° ， Δ E S - T will be smaller and the TADF characteristics will be also enhanced. However ， conformational changes of excited states ， ICT process and TADF emission are often influ⁃ enced by solvent effect ， which poses a challenge for understanding luminescence mechanism of TADF molecules. This review mainly summarizes the recent progresses in the influence of solvation on the delayed fluorescence made by our groups. As a result ， it is shown that strongly polar solvents lead to an increase in non - radiative relaxation that is averse to TADF ， as well as alteration of solvent viscosities affects the excited state conformational relaxation ， resulting in the enhancement or weakening of TADF. These results are valuable for understanding the role of solvation in conformation⁃ al relaxation and TADF emission ， and provide guidance for the design and synthesis of TADF molecules
具有不同电子供体和受体(D - A)段的热激活延迟荧光(TADF)材料可以通过反向系统间交叉(RISC)过程实现理论上100%的内部量子效率，因此在照明，显示和生物医学领域受到极大关注。通常，具有分子内电荷转移(ICT)特性的D - A体系通过扭曲分子构型来最小化单线态-三重态能隙(Δ E S - T)，从而使RISC过程快速发生。一旦激发的分子构象中D - A片段的二面角进一步扭曲，接近90°，Δ E S - T就会变小，TADF特性也会增强。然而，激发态构象变化、ICT过程和TADF发射往往受到溶剂效应的影响，这给理解TADF分子的发光机理带来了挑战。本文主要综述了近年来本研究组在溶剂化对延迟荧光影响方面的研究进展。结果表明，强极性溶剂导致对TADF不利的非辐射弛豫增加，溶剂粘度的改变影响激发态构象弛豫，导致TADF的增强或减弱。这些结果对于理解溶剂化在TADF分子构象弛豫和发射中的作用具有重要意义，并为TADF分子的设计和合成提供指导
{"title":"Effect of Solvation on Thermally Activated Delayed Fluorescence Within Electron Donor/Acceptor Chromophores","authors":"Di Song, Tian-xu Zheng, Zhuoran Kuang, A. Xia","doi":"10.37188/cjl.20230079","DOIUrl":"https://doi.org/10.37188/cjl.20230079","url":null,"abstract":"： Thermally activated delayed fluorescence （ TADF ） materials with distinct electron donor and acceptor （ D - A ） segments can achieve theoretically 100% internal quantum efficiencies via the reverse intersystem crossing （ RISC ） process ， thus receiving tremendous attention in lighting ， display ， and biomedical fields. Generally ， D - A systems with intramolecular charge transfer （ ICT ） characteristics minimize singlet - triplet energy gap （ Δ E S - T ） by having molecular con⁃ formations twisted ， so that the RISC process takes place rapidly. Once the dihedral angle of D - A segments in the excit⁃ ed molecular conformation is further twisted ， approaching 90° ， Δ E S - T will be smaller and the TADF characteristics will be also enhanced. However ， conformational changes of excited states ， ICT process and TADF emission are often influ⁃ enced by solvent effect ， which poses a challenge for understanding luminescence mechanism of TADF molecules. This review mainly summarizes the recent progresses in the influence of solvation on the delayed fluorescence made by our groups. As a result ， it is shown that strongly polar solvents lead to an increase in non - radiative relaxation that is averse to TADF ， as well as alteration of solvent viscosities affects the excited state conformational relaxation ， resulting in the enhancement or weakening of TADF. These results are valuable for understanding the role of solvation in conformation⁃ al relaxation and TADF emission ， and provide guidance for the design and synthesis of TADF molecules","PeriodicalId":10121,"journal":{"name":"Chinese Journal of Luminescence","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69946724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Temperature Sensing Characteristics of Y7O6F9∶Er,Yb/PAN Composite Fibers Based on Up-conversion Luminescence","authors":"Xin Zhao, Zhe Liu, Hai Lin, Desheng Li","doi":"10.37188/cjl.20220350","DOIUrl":"https://doi.org/10.37188/cjl.20220350","url":null,"abstract":"","PeriodicalId":10121,"journal":{"name":"Chinese Journal of Luminescence","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69946959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Min Zhang, Xian-ge Wang, Ning Li, Feng Xiao, Jinsheng Jia, Qing Huang, S. Bai, Zijun Liu, Xiang Shen, S. Dai, Q. Nie, Dan Zhao, G. Qin, Xunsi Wang
{"title":"Low Crosstalk Structure Design and Performance Simulation in 19-core Tellurite Glass Amplification Fiber","authors":"Min Zhang, Xian-ge Wang, Ning Li, Feng Xiao, Jinsheng Jia, Qing Huang, S. Bai, Zijun Liu, Xiang Shen, S. Dai, Q. Nie, Dan Zhao, G. Qin, Xunsi Wang","doi":"10.37188/cjl.20220371","DOIUrl":"https://doi.org/10.37188/cjl.20220371","url":null,"abstract":"","PeriodicalId":10121,"journal":{"name":"Chinese Journal of Luminescence","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69941482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Su, Xin Gao, Yue Zhang, Renze Zhao, Dingyang Fu, B. Bo
{"title":"High Power 970 nm Semiconductor Laser With A Tunable Grating External Cavity","authors":"P. Su, Xin Gao, Yue Zhang, Renze Zhao, Dingyang Fu, B. Bo","doi":"10.37188/cjl.20220354","DOIUrl":"https://doi.org/10.37188/cjl.20220354","url":null,"abstract":"","PeriodicalId":10121,"journal":{"name":"Chinese Journal of Luminescence","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69947363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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