Journal of Inorganic Materials ›› 2022, Vol. 37 ›› Issue (4): 445-451.DOI: 10.15541/jim20210270

Special Issue: 【能源环境】金属有机框架材料 【能源环境】钙钛矿

• RESEARCH LETTER • Previous Articles     Next Articles

Reversible Conversion between Space-confined Lead Ions and Perovskite Nanocrystals for Confidential Information Storage

ZHANG Guoqing1,2(), QIN Peng1(), HUANG Fuqiang1,2,3()   

  1. 1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
    2. School of Physical Science and Technology, ShanghaiTech University, Shanghai 201210, China
    3. State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
  • Received:2021-04-26 Revised:2021-06-29 Published:2022-04-20 Online:2021-07-12
  • Contact: QIN Peng, associate professor. E-mail: qinpeng@mail.sic.ac.cn;
    HUANG Fuqiang, professor. E-mail: huangfq@mail.sic.ac.cn
  • About author:ZHANG Guoqing (1992–), male, PhD candidate. E-mail: zgq201209@foxmail.com
  • Supported by:
    National Natural Science Foundation of China(21871008);National Natural Science Foundation of China(51872315);Key Research Program of Frontier Science, Chinese Academy of Sciences(QYZDJ-SSW-JSC013)

Abstract:

Luminescent materials have been widely used in confidential information protection and anticounterfeiting. Luminescent lead halide perovskite nanocrystals, which can be converted from the lead source through a two-step method, are attractive candidates for information encryption and decryption. Herein, the reversible conversion between the invisible lead-organic framework and the luminescent MAPbBr3 nanocrystals is achieved, together with their further application on information storage by inkjet printing technology. The lead ions are embedded into the metal-organic frameworks through coordination with the 2-methylimidazole linkers. The inherent confined distribution of lead ions facilitates the in-situ growth of perovskite nanocrystals in the second step without the assistance of external bulky ligands. The recorded information was firstly encrypted by the lead organic frameworks, which is invisible under ambient and UV light. After reacting with methylammonium bromide, the perovskite nanocrystals are in-situ formed, and the information becomes readable under UV light. Using methylammonium bromide and water as the decryption and encryption reagents could also switch on/off the luminescence, therefore, realizing the confidential information storage.

Key words: perovskite nanocrystals, photoluminescence, inkjet printing, information storage

CLC Number: