为了降低CsPbBr₃钙钛矿纳米晶的Pb²⁺毒性，同时优化Sn²⁺掺杂CsPbBr₃纳米晶的发光性能，采用热注入法合成了Sn²⁺掺杂的CsPb_1-x Sn _x Br₃纳米晶（x=0.1、0.2、0.3、0.4和0.5），使用X射线衍射仪（XRD）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和荧光光谱仪（PL）对所合成纳米晶的物相结构、微观形貌及发光性能进行表征。结果表明，纳米晶中掺杂的Sn元素以Sn²⁺和Sn⁴⁺形式存在，且含有Pb²⁺阳离子空位，当x=0.3时，Sn元素实际掺杂物质的量分数高达43.91%。x=0.1~0.4时，纳米晶为纯单斜相钙钛矿结构，尺寸约16~20 nm，立方块形貌较均匀。Sn²⁺掺杂调控了CsPb_1-x Sn _x Br₃纳米晶的光谱性能，当x=0.3时，CsPb_0.7Sn_0.3Br₃纳米晶荧光发射峰位于523 nm，半峰宽最窄达15 nm，荧光寿命长达86.3 ns，荧光强度最强，是一种具有应用潜力的绿光半导体材料。

In order to reduce the Pb²⁺ toxicity of CsPbBr₃ perovskite nanocrystals and optimize the luminescent performance of Sn²-doped CsPbBr₃ nanocrystals，Sn²⁺-doped CsPb_1-x Sn _x Br₃ nanocrystals（x=0.1，0.2，0.3，0.4 and 0.5） were synthesized by hot-injection method. The phase structure，microstructure and luminescent performance of the synthesized nanocrystals were characterized by X-ray diffractometer（XRD），transmission electron microscope（TEM），X-ray photoelectron spectroscopy（XPS），and photoluminescence spectrometer（PL）.The results showed that CsPb_1-x Sn _x Br₃ nanocrystals existed in the form of Sn²⁺ and Sn⁴⁺ ions，and contained Pb²⁺ cation vacancies. When x=0.3，the actual molar doping concentration of Sn element was as high as 43.91%. When x=0.1~0.4，the nanocrystals structure was pure monoclinic perovskite，the size was about 16~20 nm，and the square shape was uniform.The spectral properties of CsPb_1-x Sn _x Br₃ nanocrystals were regulated by Sn²⁺-doped. When x=0.3，the fluorescence emission peak of CsPb_1-x Sn _x Br₃ nanocrystals was located at 523 nm，the full width at half maxima（FWHM） was 15 nm，the fluorescence lifetime was as long as 86.3 ns，and the fluorescence intensity was the strongest，which were a kind of excellent green-light emitted semiconductor materials with potential application.