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

Ying Chen, Weiling Luan, Shaofu Zhang, Fuqian Yang

Research output: Contribution to journalConference articlepeer-review

1 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)5895-5900
Number of pages6
JournalEnergy Procedia
Volume158
DOIs
StatePublished - 2019
Event10th International Conference on Applied Energy, ICAE 2018 - Hong Kong, China
Duration: Aug 22 2018Aug 25 2018

Bibliographical note

Publisher Copyright:
© 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.

Keywords

  • Heating-cooling
  • Photoluminescence
  • QDs
  • Toluene

ASJC Scopus subject areas

  • General Energy

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