发光学报2024，Vol.45Issue(4)：637-643,7.DOI:10.37188/CJL.20230336
乙酸胍表面处理提高纯红光钙钛矿发光二极管性能
Enhanced Performance of Pure-red Perovskite Light-emitting Diodes by Surface Modification with Guanidine Acetate
摘要
Abstract
Metal-halide perovskite materials have attracted much attention in recent years due to their excellent op-toelectronic properties,which can be used to fabricate light-emitting layers of light-emitting diodes.However,there are a large number of defects on the surface of perovskite and at the interface between the perovskite layer and the transport layer,which seriously affects the performance and stability of the device,and the surface/interface treat-ment has been proven to be an effective way to reduce the interface defects and improve the performance of the de-vice.Therefore,a surface treatment strategy of adding guanidine acetate to the extractant was reported,which could effectively reduce the surface defects and improve the morphology of the perovskite film,thereby increasing the pho-toluminescence quantum yields of perovskite film from 64%to 79%.The maximum efficiency of the devices prepared based on the surface treatment of perovskite films can reach 11.66%and the maximum brightness exceeds 1 285 cd·m-2,which is significantly better than that of the control devices(6.69%,689 cd·m-2),and also shows better stabili-ty.This study provides an effective perovskite surface treatment strategy to improve the performance and stability of perovskite light-emitting diodes.关键词
钙钛矿/发光二极管/表面处理/准二维/缺陷钝化Key words
perovskite/lighting-emitter diode/surface treatment/quasi-2D/defect passivation分类
信息技术与安全科学引用本文复制引用
师明明,江季,张兴旺..乙酸胍表面处理提高纯红光钙钛矿发光二极管性能[J].发光学报,2024,45(4):637-643,7.基金项目
中国科学院战略先导专项(XDB43000000)Supported by Strategic Priority Research Program of Chinese Academy of Sciences(XDB43000000) （XDB43000000）
