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

机构：[1] School of Chemical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China; [2] School of Foreign Languages, Guizhou Institute of Technology, Guiyang, 550003, China; [3] Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：贵州理工学院化学工程学院

年份：2023

外文期刊名：SSRN

收录：EI(收录号：20230400950)

语种：英文

外文关键词：Energy gap - Functional materials - Phosphorescence - Red Shift - Scalability - Semiconductor materials

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/Cys-FMs 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. ? 2023, The Authors. All rights reserved.