One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis

ZHU Ming-xue; XU Jian-ping; ZHANG Xiao-song; SHI Qing-liang; LI Lin-lin; LIU Xiao-juan; SH

doi:10.3788/fgxb20143508.0950

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One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis

更新时间：2020-08-12

- One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis
- Chinese Journal of Luminescence Vol. 35, Issue 8, Pages: 950-955(2014)
- 作者机构：
  
  天津理工大学材料物理研究所, 光电器件与显示材料教育部重点实验室天津,300384
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20143508.0950
  CLC： O472+.3;O482.31
- Received：15 April 2014，
  
  Revised：19 June 2014，
  
  Published：03 August 2014
- 稿件说明：
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朱明雪, 徐建萍, 张晓松等. CdSe/CdS核壳纳米晶微波水热法一步合成与发光光谱分析[J]. 发光学报, 2014,35(8): 950-955

ZHU Ming-xue, XU Jian-ping, ZHANG Xiao-song etc. One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis[J]. Chinese Journal of Luminescence, 2014,35(8): 950-955
朱明雪, 徐建萍, 张晓松等. CdSe/CdS核壳纳米晶微波水热法一步合成与发光光谱分析[J]. 发光学报, 2014,35(8): 950-955 DOI： 10.3788/fgxb20143508.0950.

ZHU Ming-xue, XU Jian-ping, ZHANG Xiao-song etc. One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis[J]. Chinese Journal of Luminescence, 2014,35(8): 950-955 DOI： 10.3788/fgxb20143508.0950.

摘要

采用微波水热法一步合成了核壳结构的CdSe/CdS纳米晶，讨论了巯基丙酸中S

的释放过程对纳米晶生长的影响。XRD和Raman光谱结果表明，140℃合成温度下获得了CdSe/CdS核壳结构的纳米晶。FTIR光谱结果表明，巯基丙酸随时间的分解有助于CdS壳层的形成。PL光谱呈现出CdSe纳米晶的带间发射和缺陷发射，随着核壳结构的形成，CdSe纳米晶的表面缺陷被抑制，相关的荧光发射减弱。

Abstract

CdSe/CdS core-shell nanocrystals were one-step prepared by microwave-hydrothermal method. The growth mechanism of nanoparticles was discussed and attributed to the sulfur release process from mercaptopropionic acid. The results from XRD and Raman spectra suggested that the core-shell CdSe/CdS nanocrystals were obtained under the reaction temperature of 140℃. FTIR spectra were

in situ

monitored for the decomposition of mercaptopropionic acid upon reaction time

which contributed to the formation of CdS shells. The band-related and trap states fluorescent emission from nanocrystals were both observed in PL spectra. The increased band related emission intensity further verified the formation of core/shell structure of CdSe nanocrystals.

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references

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