摘要
钙钛矿材料因具备结构可调、光电特性优异、制备成本较低等优点,在光电探测领域获得广泛关注。针对钙钛矿量子点目前存在的环境稳定性差的关键问题,采用固相模板法在金属有机框架材料MOF-5(Zn)孔隙内实现了钙钛矿量子点的原位合成,成功制备出具有优异稳定性的CsPbBr_(3)@MOF复合材料。通过透射电镜和X射线衍射表征证实了CsPbBr_(3)量子点成功合成并填充在MOF孔隙中。利用X射线光电子能谱分析了CsPbBr_(3)@MOF的化学组成和表面结构。同时,采用紫外-可见分光光度计、荧光分光光度计和瞬态荧光光谱研究了CsPbBr_(3)@MOF的光学性能。基于荧光光谱强度的变化趋势,证实了复合材料CsPbBr_(3)@MOF的水、光和热稳定性相较于CsPbBr_(3),获得显著提升。该研究为提高钙钛矿量子点的稳定性并拓展其应用提供了新思路及解决方案。
Perovskite materials have been received widely widespread attention due to their controlled srystal structure,excellent photoelectric properties and excellent cost benefit.In order to solve the problem of poor stability of perovskite quantum dots due to environmental factors,the solid-phase template method was used to achieve the in-situ synthesis of perovskite quantum dots within the pores of metal-organic frameworks MOF-5(Zn),and CsPbBr_(3)@MOF composites were successfully prepared with excellent stability.Transmission electron microscopy(TEM)and X-ray diffraction(XRD)confirmed the successful synthesis of CsPbBr_(3)quantum dots which were filled in the MOF pores.X-ray photoelectron spectroscopy(XPS)was used to investigate the chemical composition and surface structure of CsPbBr_(3)@MOF.The optical properties of CsPbBr_(3)@MOF were studied using UV-Vis spectrophotometry,fluorescence spectrophotometry,and transient fluorescence spectroscopy.Furthermore,based on the variation of fluorescence spectral intensity,it was confirmed that the water,light,and thermal stability of the composite material CsPbBr_(3)@MOF were significantly enhanced compared to that of CsPbBr_(3).This research provides a new idea and solution for improving the stability of perovskite quantum dots and expanding their applications.
作者
杨宇轩
杨晓华
陈健壮
沈建华
张建鹏
杨晓玲
YANG Yuxuan;YANG Xiaohua;CHEN Jianzhuang;SHEN Jianhua;ZHANG Jianpeng;YANG Xiaoling(National Demonstration Center for Experimental Material Education,East China University ofScience and Technology,Shanghai 200237,China;Shanghai Winner Environmental Technologies Co.,Ltd.,Shanghai 201612,China)
出处
《功能材料》
北大核心
2025年第7期7008-7014,共7页
Journal of Functional Materials
基金
国家自然科学基金项目(22178106)
华东理工大学本科教育教学改革研究立项建设项目(校教[2023]1号)
大学生创新创业训练计划(S202410251098)
规划教材建设项目(校教[2024]5号)
本科实践教学改革与建设项目(校教[2024]14号)。
关键词
固相模板法
原位合成
钙钛矿量子点
复合材料
稳定性
solid-phase template method
in-situ synthesis
perovskite quantum dots
composite material
stability
