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Zhu, Congcong; Tao, Lu‐Qi; Peng, Zhirong; Wang, Guanya; Huang, Yexiong; Zou, Simin; Sun, Hao; Zhao, Yunfei; Chen, Xianping; Ren, Tian‐Ling
Advanced functional materials, 10/2021, Volume: 31, Issue: 43Journal Article
Visual optical information encryption–decryption and anti‐counterfeiting (IEDAC) technology play a vital role in the field of information security. Recent luminescent information encryption technologies face the disadvantages of depending on external large‐scale stimulus decryption equipment, inability to read out repeatedly, and information leakage, impeding the practical applications of luminescence encryption. Here, an integrated luminescent IEDAC chip is proposed, which provides a convenient approach to store and decipher pre‐patterned luminescence information based on laser engraved template and film heater. The luminescent encryption chip contains a double‐layer structure made up of long persistent phosphors based on SrCaGa4O8 host and a laser induced graphene heater, which makes it possible to decrypt information on a single chip. This design enables dual‐mode (photoluminescence/long persistent luminescence), dual‐color (blue/yellow‐green), and multi‐level IEDAC function, providing a novel insight and integrated strategy for implementing advanced IEDAC technologies. An integrated luminescent information encryption–decryption and anti‐counterfeiting chip made up of long persistent phosphors and a laser induced graphene heater is proposed, which provides a convenient approach to store and decipher pre‐patterned luminescence information on a single chip. This portable chip achieves dual‐mode/dual‐color luminescence and multi‐level encryption, and anti‐counterfeiting function.
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