Excitation wavelength dependent triple-mode photoluminescence of copper-based halides for advanced anti-counterfeiting
Chengjun Liu,
Yuyi Zhang,
Manman Luo,
Lixi Wang,
Xingyu Liu,
Jiangyong Pan,
Zihan Zhao,
Fan Fang,
Lei Mao,
Yuling Huang,
Bingqi Wang,
Congyuan Lin,
Wei Lei,
Qing Li,
Zhiwei Zhao,
Jun Wu,
Zhuoya Zhu,
Mehmet Ertugrul,
Xiaobing Zhang,
Jing Chen,
Dewei Zhao
Affiliations
Chengjun Liu
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Yuyi Zhang
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Manman Luo
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Lixi Wang
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Xingyu Liu
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Jiangyong Pan
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Zihan Zhao
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Fan Fang
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Lei Mao
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Yuling Huang
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Bingqi Wang
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Congyuan Lin
School of Electronics and Information Engineering, Nanjing University of Information Science and Technology, Nanjing, China
Wei Lei
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Qing Li
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Zhiwei Zhao
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Jun Wu
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Zhuoya Zhu
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Mehmet Ertugrul
Department of Electrical and Electronics Engineering, Ataturk University, Erzurum 25240, Türkiye
Xiaobing Zhang
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Jing Chen
Joint International Research Laboratory of Information Display and Visualization, School of Electronic Science and Engineering, Southeast University, Nanjing, China
Dewei Zhao
College of Materials Science and Engineering & Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Sichuan University, Chengdu 610065, China
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 (∼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 ∼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.
