中文摘要：

采用醋酸铅作为铅源，成功制备出CH3NH3PbBr3-xCIx（MA=CH3NH3，0≤x≤3）发光纳米晶体颗粒。醋酸铅比卤化物铅盐，尤其是氯化铅，能更好地溶解在N‘N’-二甲基甲酰胺（DMF）溶剂中，解决了卤化物盐溶解度低的问题。在MAPbBr3-xCIx中，不同比例的Br／CI可以产生不同的光谱性质，荧光光谱（PL）可以从399nm调控到527nm。所有荧光光谱的半峰宽（FwHM）在20nm左右，说明色谱比较纯。制备的MAPbBr3-xCIx纳米晶体颗粒尺寸分布在-（11±3）nm，可以很好地分散在甲苯中。其中，MAPbBr3纳米晶体颗粒的荧光量子产率（PLQY）高达73％，其平均荧光寿命为97．4ns。

英文摘要：

Lead acetate, which is highly soluble in dimethylformamide, was used to synthesize mixed halide perovskite CH3NH3PbBr3-xCIx （MA = CH3NH3, 0 〈 x 〈 3） nanocrystals （NCs）. This method provides an approach to address the low solubility of lead halides, especially lead chloride. Different Br/CI ratios in MAPbBr3-xCIx lead to various optical properties. The photoluminescence emission peak can be tuned from 399 to 527 nm. Their full-widths at half-maxima （FWHM） are about 20 nm. MAPbBr3-xCIxNCs have an average diameter of -（11 ±3） nm and have uniform dispersion in toluene. The MAPbBr3 NCs have a long average recombination lifetime （Tave = 97.4 ns） and a photoluminescence quantum yield （PLQY） of up to 73%.