发光学报, 2014, 35 (8): 950, 网络出版: 2014-08-18  

CdSe/CdS核壳纳米晶微波水热法一步合成与发光光谱分析

One-step Preparation of CdSe/CdS Core-shell Nanocrystals by Microwave Hydrothermal Method and Photoluminescence Spectra Analysis
作者单位
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
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S2-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.

朱明雪, 徐建萍, 张晓松, 石庆良, 李霖霖, 刘晓娟, 石鑫, 王亚中, 魏行远, 李岚. 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. ZHU Ming-xue, XU Jian-ping, ZHANG Xiao-song, SHI Qing-liang, LI Lin-lin, LIU Xiao-juan, SHI Xin, WANG Ya-zhong, WEI Xing-yuan, LI Lan. 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.

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!