文献类型：会议论文

英文题名：Fluorescence of CdSe/ZnS quantum dots in toluene: effect of cyclic temperature

作者：Chen, Ying[1];Luan, Weiling[1];Zhang, Shaofu[1];Yang, Fuqian[2]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety MOE, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Univ Kentucky, Mat Program, Dept Chem & Mat Engn, Lexington, KY 40513 USA

会议论文集：10th International Conference on Applied Energy (ICAE)

会议日期：AUG 22-25, 2018

会议地点：Hong Kong, HONG KONG

语种：英文

外文关键词：QDs; heating-cooling; photoluminescence; toluene

摘要：Quantum dots (QDs) are the potential material for the application in optical thermometry, and have been successfully applied to solar cells, LEDs, bio-labeling, structural health monitoring, etc. In this paper, we study the fluorescence properties of CdSe/ZnS QDs in toluene under the action of heating-cooling cycles. The experimental results show that, in a heating-cooling cycle, increasing temperature causes red-shift of the emission peak and the decrease of the PL intensity, and decreasing temperature causes blue shift of the emission peak and the increase of the PL intensity. The surface structures of the QDs likely are dependent on the cycle numbers, which cause the change of the excited energy state of the QDs in toluene. The results presented in this paper reveals the strong effects of cyclic temperature on the photoluminescence characteristics of QDs. (C) 2019 The Authors. Published by Elsevier Ltd.