【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。更多还原

【Abstract】 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.更多还原