采用室温重结晶法制备CsPbBr3 量子点,分别利用六种常用的极性溶剂对量子点粗液进行高速离心提纯,监测提纯过程中每一步骤后的光致发光光谱,并采用吸收光谱,荧光寿命、X射线衍射分析和透射电镜等表征方法系统表征了六种极性溶剂提纯得到的CsPbBr3 量子点.研究表明,通过六种极性溶剂提纯,都可以得到结晶度良好的呈立方体形态的立方相CsPbBr3 量子点；在利用六种不同极性溶剂进行提纯过程中,第二次离心得到的上清液具有最为统一的半峰宽和峰值波长；除乙酸乙酯外,第二次离心得到的上清液具有最高的量子产出；比较而言,通过正丙醇、异丙醇、正丁醇特别是异丁醇提纯得到的CsPbBr3 量子点具有较高的发光性能.

CsPbBr3 quantum dots were prepared by room temperature recrystallization. The quantum dot crude solution was purified by high-speed centrifugation using six common polar solvents. The photoluminescence spectrum after each step in the purification process was monitored and the absorption spectrum was used. Fluorescence lifetime, X-ray diffraction analysis and transmission electron microscopy were used to characterize the CsPbBr3 quantum dots purified by six polar solvents. The results show that cubic phase CsPbBr3 quantum dots with good crystallinity can be obtained by purification of six polar solvents. The supernatant obtained by the second centrifugation during purification process using six different polar solvents has the most uniform half-width and peak wavelength; except for ethyl acetate, the supernatant obtained by the second centrifugation has the highest quantum yield; in contrast , the CsPbBr3 quantum dots obtained by isobutanol purification have higher Luminescence performance.