CsPb_(x)Sn_(1-x)Br_(3)/a⁃ZrP复合材料的光学性能及其在白色发光二极管中的应用  

Optical Properties of CsPb_(x)Sn_(1-x)Br_(3)/a-ZrP Perovskite Quantum Dots for White Light-emitting Diodes

作　　者：吴春霞[1] 贾瑞君 WU Chunxia;JIA Ruijun(College of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013

出　　处：《发光学报》2023年第8期1413-1421,共9页Chinese Journal of Luminescence

基　　金：国家自然科学基金(11874185)。

摘　　要：钙钛矿量子点(PQDs)由于具有高量子效率、可调节带隙、高色纯度及低成本等优点,在光电领域具有良好的应用前景。然而,其较差的稳定性阻碍了钙钛矿量子点的应用。本文在室温条件下合成了CsPb_(x)Sn_(1-x)Br_(3)/a‐ZrP PQDs,与传统CsPbBr_(3) PQDs对比,具有更好的光学性能及稳定性。由于a‐ZrP对于Pb2+选择吸附性的固有特性以及与Cs+离子交换的能力,促进了量子点在a‐ZrP表面的吸附锚定。因此,合成的CsPb_(x)Sn_(1-x)Br_(3)/a‐ZrP PQDs具有更高的激子结合能和更强的环境稳定性。该复合材料为生产稳定高效的钙钛矿量子点提供了一种可行的方法,并表明CsPb_(x)Sn_(1-x)Br_(3)/a‐ZrP PQDs是一种高效的下转换荧光材料,可用于高效发光二极管的制备。Nowadays,perovskite(CsPbX_(3),X=Cl,Br,I)quantum dots(PQDs)have been widely used in optical properties due to their high photoluminescence quantum yield(PLQY),adjustable band gap,high color purity,and low cost.However,due to its inherent instability,such as oxygen,heat,and moisture.It is still a problem to hinder the applications of lead halide perovskite.In this paper,we synthesize CsPb_(x)Sn_(1-x)Br_(3)/a-ZrP PQDs at room temperature.Compared with the original CsPbBr_(3) PQDs,CsPb_(x)Sn_(1-x)Br_(3)/a-ZrP PQDs have better optical performance and stability.Due to the inherent characteristics of a-ZrP nanosheets for high Pb^(2+)adsorptivity and good ability to exchange ions with Cs^(+),it promoted adsorption and anchoring of perovskite quantum dots on the surface of a-ZrP.Therefore,the synthesized CsPb_(x)Sn_(1-x)Br_(3)/a-ZrP PQDs have higher exciton binding energy and stronger environmental stability.The PQDs provide a feasible method for producing stable and efficient perovskite quantum dots,and show that CsPb_(x)Sn_(1-x)Br_(3)/a-ZrP PQDs are efficient down-conversion fluorescent materials for the preparation of high-efficiency LEDs.

关 键 词：钙钛矿 量子点 吸附 掺杂Sn^(2+) 荧光增强 白光发光二极管(WLED) 

分 类 号：O482.31[理学—固体物理] TN312.8[理学—物理]