文献类型：期刊文献

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] Key Laboratory of Pressure Systems and Safety [MOE], School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; [2] Materials Program, Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY, 40513, United States

年份：2019

卷号：158

起止页码：5895

外文期刊名：Energy Procedia

收录：EI(收录号：20191506746098)

语种：英文

外文关键词：Structural health monitoring - Fluorescence - Nanocrystals - Toluene - Photoluminescence - Excited states - Red Shift - II-VI semiconductors - Semiconductor quantum dots - Temperature

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. ? 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of ICAE2018 - The 10th International Conference on Applied Energy.