Differential response under X-ray/UV dual-mode excitation in single-component defect state phosphor X-ray imaging and Wavelength-Multiplexing information storage

• Published in: Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2024-08, Vol.494, p.152868, Article 152868
• Main Authors: Jiang, Xiaqing, Long, Zhangwen, Yang, Junyi, Li, Jingjing, Song, Hao, Xu, Yusheng, Zhou, Dacheng, Yang, Yong, Wang, Qi, Qiu, Jianbei
• Format: Article
• Language: English
• Subjects: advanced bright/dark dual-field X-ray imaging; Precise emitter/trap local units; Wavelength-multiplexing information storage
• ISSN: 1385-8947
• DOI: 10.1016/j.cej.2024.152868

•The varying afterglow colors under different excitation modes enable wavelength-multiplexed optical storage.•X-ray-induced persistent luminescence and photochromism contribute to advanced bright/dark dual-field X-ray imaging.•This provides an effective design strategy for developing multi-modal optical information storage materials. Multimodal Excitation Response (MMER) phosphors are gaining rapid attention due to their outstanding performance and emerging applications. Herein, a Eu2+, Mn2+ co-doping CaAl2Si2O8 phosphor is reported. Unlike common MMER phosphors, this system exhibits blue photo-/persistent luminescence under 365 nm UV excitation, orange photo-/persistent luminescence under X-ray excitation, and X-ray-induced photochromism. These diverse optical properties enable it to exhibit advanced bright/dark dual-field X-ray imaging and wavelength-multiplexing information storage. Furthermore, the testing results indicate that the varying color response to UV and X-ray excitation benefits from different excitation properties between Eu2+ and Mn2+ as well as precise emitter/trap local units. Thus, this work not only provides an excellent candidate for versatile applications but also offers a design approach for such materials.