Cs3Cu2X5纳米晶光致发光性能及光照抗菌性能

doi:10.3976/j.issn.1002-4026.2025120

山东科学 ›› 2026, Vol. 39 ›› Issue (2): 89-97.doi: 10.3976/j.issn.1002-4026.2025120

• 光功能材料与催化应用 • 上一篇下一篇

Cs₃Cu₂X₅纳米晶光致发光性能及光照抗菌性能

侯立军¹(), 赵顺帆², 单衍苏², 鲁艳芹³^,^*(), 曹丙强²^,^*()

¹ 苏州大学附属传染病医院(苏州市第五人民医院), 江苏苏州 215131
² 济南大学材料科学与工程学院, 山东济南 250022
³ 山东第一医科大学生物医学科学学院, 山东济南 250117

收稿日期:2025-10-17 修回日期:2025-11-17 出版日期:2026-04-20 上线日期:2026-01-07
通信作者: *鲁艳芹,女,教授,研究方向为生物医学。E-mail: yqlu@sdfmu.edu.cn;曹丙强,男,教授,研究方向为半导体光电医用材料与器件。E-mail: mse_caobq@ujn.edu.cn
作者简介:侯立军,女,硕士,副主任医师,研究方向为感染休克与肿瘤方向。E-mail: 15061801325@163.com
基金资助:
国家重点研究发展计划(2022YFC3700801);国家自然科学基金(52572168)

Photoluminescence properties and light-induced antibacterial performance of Cs₃Cu₂X₅ nanocrystals

HOU Lijun¹(), ZHAO Shunfan², SHAN Yansu², LU Yanqin³^,^*(), CAO Bingqiang²^,^*()

¹ Affiliated Infectious Diseases Hospital of Soochow University (Suzhou Fifth People’s Hospital), Suzhou 215131, China
² School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
³ School of Biomedical Sciences, Shandong First Medical University, Jinan 250117, China

Received:2025-10-17 Revised:2025-11-17 Published:2026-04-20 Online:2026-01-07

摘要/Abstract

摘要：

铅基卤化物钙钛矿纳米晶因其卓越的光电特性而备受关注。然而,铅基钙钛矿较小的斯托克斯位移会引发严重的自吸收效应,显著制约了其发光效率与应用。同时,铅元素具有生物毒性且对人体健康会产生不可逆的危害。为此,本文采用热注射法制备了无铅钙钛矿Cs₃Cu₂X₅(X=Cl, Br, I) 纳米晶,并系统表征了其物相组成与微观形貌。荧光光谱和变温荧光寿命等光学表征结果表明,Cs₃Cu₂X₅纳米晶的高荧光量子产率与大斯托克斯位移源自于其自陷激子发光(STEs)机制。为进一步提升其应用潜力,我们采用SiO₂对Cs₃Cu₂X₅纳米晶进行表面包覆,提升了其在水相环境中的分散性与生物相容性。最后,以大肠杆菌为模型菌株,结合浊度分析和平板涂布实验,评估了Cs₃Cu₂X₅@SiO₂核壳纳米晶的光照抗菌性能。本研究揭示了Cs₃Cu₂X₅纳米晶优异发光性能的物理起源并展示了其在生物医学领域作为高效、安全光功能材料的应用潜力。

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

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 Cs₃Cu₂X₅ 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.

Key words: perovskite, nanocrystals, core-shell structure, luminescent mechanism, biocompatibility, light-induced antibacterial performance

中图分类号:

TB34

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.

HOU Lijun, ZHAO Shunfan, SHAN Yansu, LU Yanqin, CAO Bingqiang. Photoluminescence properties and light-induced antibacterial performance of Cs₃Cu₂X₅ nanocrystals[J]. Shandong Science, 2026, 39(2): 89-97.

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样品	PL峰位置/nm	荧光量子产率/%	半高全宽/nm	CIE(x,y)	荧光寿命/μs	斯托克斯位移/nm
Cs₃Cu₂Cl₅	521	73.97	95	0.30,0.513	108	216
Cs₃Cu₂Br₅	460	11.74	81	0.14,0.131	17.6	157
Cs₃Cu₂I₅	442	43.83	75	0.16,0.134	2.87	129

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

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