铜离子掺杂CsPbCl_(3)量子点光学性能及稳定性探究

Study on optical properties and stability of Cu^(2+)-doped CsPbCl_(3) quantum dots

近年来,钙钛矿因其特殊的结构受到广泛的关注。其中,全无机钙钛矿量子点作为下一代发光材料更因其优异的发光性能得到了广泛的研究和关注。但是因为其本身的铅(Pb)元素带来的毒性和较差的稳定性,钙钛矿量子点在生产和应用方面依然面临着诸多阻碍。为了解决这些难题,介绍了一种铜离子(Cu^(2+))B位掺杂CsPbCl_(3)钙钛矿量子点。采用了热注射的方法成功地将Cu^(2+)引入CsPbCl_(3)钙钛矿量子点中。研究发现,Cu^(2+)掺杂CsPbCl_(3)量子点能够保持初始四方晶体结构。由于Cu^(2+)的掺杂,有效地消除了CsPbCl_(3)量子点的表面缺陷,从而通过辐射途径促进了激子复合,提高了CsPbCl_(3)量子点的发光性质。通过稳定性对比测试发现,一段时间内,Cu^(2+)掺杂CsPbCl_(3)量子点在水中的发光强度明显高于CsPbCl_(3)量子点。

In recent years,perovskites have attracted extensive attention because of their special structure.Among them,all inorganic perovskite quantum dots,as the next generation of luminescent materials,have received abroad research and attention because of their excellent luminescent properties.However,due to the toxicity and poor stability of Pb,perovskite quantum dots still face many obstacles in production and application.In order to solve these problems,a Cu^(2+)ion B-site doped CsPbCl_(3) perovskite quantum dot was introduced.Cu^(2+)was successfully doped into CsPbCl_(3) perovskite quantum dots by hot injection.It was found that Cu^(2+)-doped CsPbCl_(3) quantum dots still maintained the initial tetragonal crystal structure.Due to the doping of Cu^(2+)ions,the surface defects of CsPbCl_(3) quantum dots were effectively eliminated,which promoted exciton recombination through radiation and improved the luminescence properties of CsPbCl_(3) quantum dots.Through the stability test,it was revealed that the luminescence intensity of Cu^(2+)-doped CsPbCl_(3) quantum dots in water was significantly higher than that of CsPbCl_(3) quantum dots in certain time.