采用前驱体分解法制备了 Cu-In-S 量子点,研究了制备工艺对Cu-In-S 量子点的形貌以及光学性能的影响.实验结果表明,反应时间和反应温度可影响Cu-In-S 纳米颗粒的尺寸和光学性能.随时间增加,Cu-In-S粒径变大,同时会伴随着棒状晶体的出现,荧光发射谱的峰位发生红移.随反应温度升高,纳米晶的形核速率和长大速率增加,并且粒径也有增大,纳米晶的形状可以由单一的球形变为球形与棒状的混合,荧光谱峰位亦会发生红移.X 射线光电子能谱分析表明,所制备颗粒为 CuInS2纳米晶.为进一步制备无毒量子点发光器件(QLEDs)奠定了基础.
Ternary CuInS quantum dots were synthesized by decomposition of precursor,and the effects of syn-thesis parameter on the morphology and optical properties of CuInS nanocrystals were investigated.It is found that the particle size and optical properties of CuInS crystals could be obviously affected by reaction time and temperature.With increasing reaction time,the CuInS nanocrystals grow larger,accompanied with appearance of rodlike crystals and red shift of the peak of the fluorescent emission spectra.With increasing reaction temper-ature,the growing rate and the particle size of nanocrystals increase.Meanwhile,the shape of nanocrystals can vary from single sphere to mixing of sphere and rod.There is also a red shift of emission peak.Measurement of XPS indicates that as-synthesized particles areCuInS2 nanocrystals.This work would build foundation for further manufacture of non-toxic quantum dots light-emitting devices (QLEDs).
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