Excitation wavelength dependent triple-mode photoluminescence of copper-based halides for advanced anti-counterfeiting

被引:0
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作者
Liu, Chengjun [1 ]
Zhang, Yuyi [1 ]
Luo, Manman [1 ]
Wang, Lixi [2 ]
Liu, Xingyu [1 ]
Pan, Jiangyong [2 ]
Zhao, Zihan [1 ]
Fang, Fan [1 ]
Mao, Lei [2 ]
Huang, Yuling [2 ]
Wang, Bingqi [2 ]
Lin, Congyuan [2 ]
Lei, Wei [1 ]
Li, Qing [1 ]
Zhao, Zhiwei [1 ]
Wu, Jun [1 ]
Zhu, Zhuoya [1 ]
Ertugrul, Mehmet [3 ,4 ,5 ]
Zhang, Xiaobing [1 ]
Chen, Jing [1 ]
Zhao, Dewei [6 ,7 ]
机构
[1] Southeast Univ, Sch Elect Sci & Engn, Joint Int Res Lab Informat Display & Visualizat, Nanjing, Peoples R China
[2] Nanjing Univ Informat Sci & Technol, Sch Elect & Informat Engn, Nanjing, Peoples R China
[3] Ataturk Univ, Dept Elect & Elect Engn, TR-25240 Erzurum, Turkiye
[4] Univ Putra Malaysia, Dept Elect & Elect Engn, UPM Serdang, Serdang 43400, Malaysia
[5] Kyrgyz Turkish Manas Univ, Dept Elect & Elect Engn, 56 Chyngyz Aitmatov Ave, Bishkek, Kyrgyzstan
[6] Sichuan Univ, Coll Mat Sci & Engn, Minist Educ, Chengdu 610065, Peoples R China
[7] Sichuan Univ, Engn Res Ctr Alternat Energy Mat & Devices, Minist Educ, Chengdu 610065, Peoples R China
关键词
LIGHT-EMITTING-DIODES; LUMINESCENCE; SINGLE; EMISSION;
D O I
10.1063/5.0152479
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
New fluorescent materials with a low cost, hypotoxicity, and concealment are desired for the application of anti-counterfeiting. Herein, we report a CsCu2I3@Cs3Cu2I5 composite with a triple-mode photoluminescence (PL) feature by simply adjusting the excitation wavelengths, which are ascribed to the multiple excited states of different phases in the CsCu2I3@Cs3Cu2I5 composite. The broadband emission and high quantum yield (similar to 51%) of the composite originate from the structure-oriented self-trapped excitons effect of Cs3Cu2I5 and CsCu2I3 phases. Moreover, the incorporation of polyethylene oxide (PEO) into this composite improves the stability of CsCu2I3@Cs3Cu2I5@PEO against harsh environments. The CsCu2I3@Cs3Cu2I5@PEO composite has a slight decay of similar to 5% of its initial PL intensity and only a 3.5% shift of the corresponding color coordinate after 30 days of storage. More importantly, its initial PL intensity shows only 10.3% decay under ultraviolet exposure for 200 h. Our work provides a promising approach to design materials for advanced anti-counterfeiting applications. (c) 2023 Author(s).
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页数:9
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