Realizing Multicolor and Stepwise Photochromism for On-Demand Information Encryption

Wei Hu; Zhongxian Qiu; Yunwen Bao; Jiaren Du; Jilin Zhang; Philippe F. Smet; Xiao-Dong Wen; Shixun Lian

doi:10.1021/acsenergylett.4c00383

journal article·2024-05-10Open access

Realizing Multicolor and Stepwise Photochromism for On-Demand Information Encryption

Wei Hu, Zhongxian Qiu, Yunwen Bao, Jiaren Du, Jilin Zhang, Philippe F. Smet, Xiao-Dong Wen, Shixun Lian

ACS Energy Letters· Volume 9· Issue 5

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Source abstract

Abstract

This work achieves dual-mode light- and heat-responsive step-by-step coloration via trap engineering in the Ba 5 (PO 4 ) 3 Cl:Eu 2+,Ce 3+,F – (BPCF) phosphor. A three-step calcination (BPCF-III) strategy promotes the redistribution of multitraps and balances three color-centers to facilitate photoinduced electron transfer processes. The BPCF-III shows controllable color tunability due to the distinct energy stimulation for each color-center with different trap depths. The powder color changes from white to red after 254 nm irradiation at RT, then turns to yellow upon optical stimulation at 532 nm or heating at 150 °C and to green upon 200–300 °C heating, and finally recovers to white upon 450 or 405 nm stimulation or heating above 350 °C. The powder color can also vary to green directly when T = 200–300 °C, where the charging wavelength extends from 254 to 405 nm. Such multicolor and stepwise photochromism in a single matrix presents a significant guideline for designing high-performance photochromic material-based devices.

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Research context

OpenAlex topics: Photochromic and Fluorescence Chemistry · Advanced Photocatalysis Techniques · Luminescence and Fluorescent Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Light Energy Conversion Materials of Hunan Province College, Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China

College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China

State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China

School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, China

LumiLab, Department of Solid State Sciences, Ghent University, 9000 Ghent, Belgium

Funding

Natural Science Foundation of Hunan Province · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China

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