摘要
以巯基乙酸(TGA)作为稳定剂,用微波辅助法快速合成了水溶性CdTe/CdSe核壳量子点。比较了传统水热法和微波辅助法制备的量子点性能,研究了加热温度、反应物配比及CdTe量子点浓度对CdTe/CdSe核壳量子点的性能影响。研究结果表明,核壳结构的CdTe/CdSe量子点比单一的CdTe量子点具有更优异的光致发光强度和光稳定性。
In this paper,present a new procedure for the rapid synthesis of luminescent CdTe/CdSe core-shell quantum dots（QDs） in water phase by microwave irradiation method.The influences of microwave irradiation and a series of experimental variables,including heating temperature,molar ratios and concentration of precursors on the synthesis of QDs were investigated systematically.The results of high-resolution transmission electron microscopy（HRTEM） and X-ray diffraction（XRD） showed that the as-prepared nanocrystals had high crystallinity.In comparison with the plain CdTe QDs,both the photoluminescence quantum yield（PLQY） and photostability against UV irradiation of the CdTe/CdSe core-shell QDs have been greatly improved.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2011年第4期659-662,667,共5页
Journal of Functional Materials
基金
国家重点基础研究发展计划(973计划)资助项目(2005CB723400-G
2010CB933900)
国家高技术研究发展计划(863计划)重点资助项目(2007AA022004)
国家自然科学基金资助项目(20771075)
上海市科委纳米专项基金资助项目(0752nm024)
国家科技重大专项资助项目(2009ZX10004-311)
关键词
水溶性
量子点
微波
核壳
aqueous
quantum dot
microwave
core-shell
