Unique Luminescence Properties in Zn2+-Doped CsPbBr3 Perovskite Nanocrystals

All-inorganic halide perovskite (CsPbX 3 ) is a photoelectric material with great potential. However, the Pb element in CsPbX 3 is toxic, which affects the further use of these materials. The toxicity problem can be solved by adding Zn ions into CsPbBr 3 . In this work, Zn-doped cesium lead bromide perovskites (CsPbBr 3 ) nanocrystals (NCs) were synthesized by thermal injection method, and their optical properties were also studied. When Zn was introduced into CsPbBr 3 , its exciton emission summit shifts slightly. By changing the concentration of Zn 2 + , the size and optical properties of Zn:CsPbBr 3 NCs can be controlled. We also study the decay lifetime of its emission peak, and the results showed that Zn:CsPbBr 3 had a longer PL decay lifetime than undoped CsPbBr 3 . This indicated that the incorporation of CsPbBr 3 into Zn 2 + had a good application prospect in the optical field.