文献类型：期刊文献

英文题名：Achieving the conversion from Room-Temperature phosphorescence to photothermal properties by Carbon-Regulated bandgap

作者：Shu, Qunwei Wang, Xueli An, Yanling

通信作者：Shu, QW[1];An, YL[2]

机构：[1]Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;[2]Guizhou Inst Technol, Sch Min Engn, Guiyang 550003, Peoples R China;[3]Guizhou Inst Technol, Guiyang 550003, Peoples R China

第一机构：贵州理工学院化学工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Chem Engn, Guiyang 550003, Peoples R China;corresponding author), Guizhou Inst Technol, Guiyang 550003, Peoples R China.|贵州理工学院;贵州理工学院化学工程学院;

年份：2024

卷号：481

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;Scopus(收录号：2-s2.0-85184769919);WOS:【SCI-EXPANDED(收录号:WOS:001166929900001)】；

基金：The authors appreciate financial support from Guizhou Provincial Science and Technology Foundation (20191133) and the Talents of high level scientific research fund in Guizhou Institute of Technology (No. XJGC20190934) .

语种：英文

外文关键词：Room -temperature phosphorescence; Photothermal conversion; Bandgap tunability; Carbon component engineering; Phosphorescent anti -counterfeiting

摘要：Bandgap tunability plays an important role in controlling the photophysical properties of semiconductor material. In this work, we propose a powerful carbon component engineering strategy for regulating the optical bandgap of scandium/cysteine functional materials (Sc/Cys-FMs) that are synthesized by a facile one -pot hydrothermal method. The band structure of Sc/Cys-FMs is closely related to the Cys ligands. As Cys amount rises, the obtained Sc/Cys-FMs exhibit the red -shifted room -temperature phosphorescence (RTP) emission from Sc/ Cys-FMs-50 (3.01 eV) to Sc/Cys-FMs-150 (2.14 eV), accompanied by a decrease in quantum efficiency and an increase in lifetime. Meanwhile, the Sc/Cys-FMs show a unique time -dependent phosphorescence color (TDPC) phenomenon, with a dynamic transition of RTP color from yellow to green as the decay time prolongs because of the emission -dependent lifetime. As the amount of Cys further increases, the bandgap can be continuously reduced to 1.88 eV (Sc/Cys-FMs-300) and 1.56 eV (Sc/Cys-FMs-600), causing the quenching of RTP emission and significantly enhanced photothermal properties. The continuously decreasing bandgap has been proven to be directly ascribed to the increase of carbon component in Sc/Cys-FMs. Considering the TDPC properties, Sc/CysFMs can be well used for dynamic phosphorescent anti -counterfeiting. This work not only develops a scalable method for preparing functional materials with superior RTP and photothermal properties, but also proposes the carbon component engineering strategy to achieve bandgap tunability of materials.