山东科学2026，Vol.39Issue(2)：89-97,9.DOI:10.3976/j.issn.1002-4026.2025120
Cs3Cu2X5纳米晶光致发光性能及光照抗菌性能
Photoluminescence properties and light-induced antibacterial performance of Cs3Cu2X5 nanocrystals
摘要
Abstract
Lead-based halide perovskite nanocrystals have attracted extensive attention due to their outstanding optoelectronic properties.However,their small Stokes shifts often lead to severe self-absorption,which greatly limit their luminescence efficiency and practical applications.Moreover,the inherent biological toxicity of lead poses irreversible risks to human health and the environment.To address these issues,this study synthesized lead-free Cs3Cu2X5(X=Cl,Br,I)perovskite nanocrystals using a hot-injection method and systematically characterized their phase purity,compositions,and microstructures.Optical measurements,including fluorescence spectroscopy and temperature-dependent fluorescence lifetimes,revealed that the high photoluminescence quantum yield and large Stokes shifts of Cs3 Cu2 X5 nanocrystals originate from their self-trapped exciton emission mechanism.To enhance their applicability,we further coated the nanocrystals with a SiO2 shell,which significantly improved their dispersibility in aqueous media and their biocompatibility.Finally,using Escherichia coli as a model bacterium,the photo-induced antibacterial performance of the Cs3Cu2X5@SiO2 core-shell nanocrystals was evaluated through turbidity analysis and colony counting assays.This study revealed the physical origin of the outstanding luminescent properties of Cs3Cu2X5 nanocrystals and demonstrated their potential as efficient and safe optical materials in biomedical applications.关键词
钙钛矿/纳米晶/核壳结构/发光机制/生物相容性/光照抗菌性能Key words
perovskite/nanocrystals/core-shell structure/luminescent mechanism/biocompatibility/light-induced antibacterial performance分类
通用工业技术引用本文复制引用
侯立军,赵顺帆,单衍苏,鲁艳芹,曹丙强..Cs3Cu2X5纳米晶光致发光性能及光照抗菌性能[J].山东科学,2026,39(2):89-97,9.基金项目
国家重点研究发展计划(2022YFC3700801) （2022YFC3700801）
国家自然科学基金(52572168) （52572168）
