A zero-dimensional perovskite with high-efficiency luminescence and transient response for advanced information encryption

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2024-09, Vol.496, p.153939, Article 153939
• Main Authors: Yuan, Junheng, Wang, Tianchi, Zhang, Yu, Yao, Shuyi, Han, Lulu, Mu, Dedan, Song, Hao, He, Jiayi, Zhang, Feng, Xu, Xuhui
• Format: Article
• Language: English
• Subjects: High quantum efficiency; Information Encryption; Photoluminescence; Transient Response
• ISSN: 1385-8947
• DOI: 10.1016/j.cej.2024.153939

•A novel zero-dimensional organic–inorganic hybrid perovskite, that is (TEA)2CdCl4, has been designed. Upon Sb3+ doping, it not only exhibits an outstanding photoluminescence quantum efficiency of 100 %.•The material has a negative thermal quenching phenomenon rarely seen in organic and inorganic hybrid perovskites, and the luminescence is strongest at about 100℃.•With super fast synthesis speed, it provides a new idea for the field of information encryption.•A kind of information encryption paper which can be produced in large area is designed and prepared, and the security of information is guaranteed. Due to the increasingly complex network attacks and advancements in computational technology, finding new and efficient encryption techniques is an urging task. As a promising material, the application of perovskite luminescent materials in information encryption is limited to pre-planned specific scenarios or applications, lacking the ability to respond to temporary demands. In this work, we have designed a novel cadmium-based zero-dimensional perovskite, TEA2CdCl4, which presents blue luminescence centered at 413 nm originating from organic cations. Upon Sb3+ doping, it not only exhibits intense red emission at 623 nm with a high photoluminescence quantum efficiency up to 100 %, but also brings outstanding resistance to thermal quenching. Especially, an ultrafast response speed could be achieved during decryption process which has been verified by first-principles calculations. Based on the advantages, a large-area optical anti-counterfeiting paper for temporary information encryption transmission is designed, which not only verifies the potential for secure information transmission and protection, but also introduces a new concept for the application of organic–inorganic hybrid perovskites in the field of information encryption.