Five-level anti-counterfeiting based on versatile luminescence of tri-doped double perovskites  

作　　者：Xingru Yang Yuhang Sheng Linglong Zhang Lun Yang Fangjian Xing Yunsong Di Cihui Liu Fengrui Hu Xifeng Yang Guofeng Yang Yushen Liu Zhixing Gan 

机构地区：[1]Center for Future Optoelectronic Functional Materials, School of Computer and Electronic Information/School of Artificial Intelligence, Nanjing Normal University, Nanjing, 210023, China [2]College of Physics, Nanjing University of Aeronautics and Astronautics, Key Laboratory of Aerospace Information Materials and Physics (NUAA), MIIT, Nanjing, 211106, China [3]Hubei Key Laboratory of Photoelectric Materials and Devices, School of Materials Science and Engineering, Hubei Normal University, Huangshi, 435002, China [4]College of Engineering and Applied Sciences and MOE Key Laboratory of Intelligent Optical Sensing and Manipulation, Nanjing University, Nanjing, 210093, China [5]College of Electronic and Information Engineering, Changshu Institute of Technology, Suzhou, 215500, China [6]School of Science, Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Jiangnan University, Wuxi, 214122, China [7]Yancheng Polytechnic College, Yancheng, 224005, China

出　　处：《Nano Research》2024年第11期9971-9979,共9页纳米研究（英文版）

基　　金：supported by the Natural Science Foundation of Shandong Province(No.ZR2021YQ32);China Postdoctoral Science Foundation(No.2023M740472);the National Natural Science Foundation of China(Nos.62074019,62174016,and 62375028);Partial support was given by the Taishan Scholars Program of Shandong Province(No.tsqn201909117);Opening Foundation of Hubei Key Laboratory of Photoelectric Materials and Devices(No.PMD202401);the special fund for Science and Technology Innovation Teams of Shanxi Province.

摘　　要：Luminescent materials with multi-emission features are difficult to be replicated, which are highly desirable for advanced anti-counterfeiting. Here, we report the pioneering synthesis of Mn^(2+)/Yb^(3+)/Er^(3+) tri-doped Cs2Ag0.8Na0.2InCl6 double perovskites (MYE-DP), which exhibit photoluminescence (PL) covering from visible to near-infrared (NIR). The PL colors under excitations of 254 and 365 nm are notably different due to the changed relative emission intensities of self-trapped excitons (STEs) and Mn^(2+) d–d transition. Moreover, under the excitation of a NIR laser, the MYE-DP exhibits upconversion (UC) emissions of Mn^(2+) and Er^(3+). After ceasing the excitation, the long-lived trapped electrons can be thermally released to Mn^(2+) and Er^(3+) ions, resulting in both visible and NIR afterglow. Based on multi-modal emissions of the MYE-DP, we demonstrate a five-level anti-counterfeiting strategy, which significantly increases the anti-counterfeiting security. In addition, this work provides valuable insights into the energy transfer between STEs, Mn^(2+), Ln^(3+), and traps, laying a solid foundation for future development of new lead-free perovskites.

关 键 词：ANTI-COUNTERFEITING PHOTOLUMINESCENCE self-trapped excitons UPCONVERSION 

分 类 号：O61[理学—无机化学]