Lead-free Ba₂LaNbO₆: Eu³⁺ phosphors with Bi³⁺-enhanced photochromism for dual-mode X-ray detection and 3D imaging

doi:10.1016/j.jmst.2025.01.062

J. Mater. Sci. Technol. ›› 2025, Vol. 235: 156-166.DOI: 10.1016/j.jmst.2025.01.062

• Research Article • Previous Articles Next Articles

Lead-free Ba₂LaNbO₆: Eu³⁺ phosphors with Bi³⁺-enhanced photochromism for dual-mode X-ray detection and 3D imaging

Yueteng Zhang^a, Zan Xu^a, Xue Bai^a, Heping Zhao^a, Jianbei Qiu^a, Zhiguo Song^a, Jiayan Liao^b,*, Zhengwen Yang^a,*

^aCollege of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China;
^bInstitute for Biomedical Materials and Devices (IBMD), Faculty of Science, University of Technology Sydney, NSW 2007, Australia

Received:2024-11-20 Revised:2025-01-02 Accepted:2025-01-08 Published:2025-11-10 Online:2025-12-19
Contact: ^*E-mail addresses: jiayan.liao@uts.edu.au (J. Liao), yangzw@kust.edu.cn (Z. Yang).

Abstract

Abstract: This study explores the application of X-ray-induced photochromism and photoluminescence in optical storage, anti-counterfeiting, non-destructive testing, and high-resolution X-ray detection and imaging. Ba₂LaNbO₆: Bi, Eu phosphors were synthesized, with Bi enhancing X-ray-induced photochromic properties. Under X-ray irradiation, the phosphors transfer from white to red in bright field conditions and emit red photoluminescence in dark field conditions. Exposure to 470 nm ultraviolet light induces rapid bleaching. The mechanisms of photochromism and photoluminescence, particularly Bi's role as a colorant, were systematically investigated. The Ba₂LaNbO₆: Bi, Eu phosphors film achieves high resolution, highlighting its potential for X-ray imaging and non-destructive testing. Furthermore, the flexible Ba₂LaNbO₆: Bi, Eu film supports dual-mode imaging and detection, addressing the limitations of traditional flat displays in 3D imaging.

Key words: Lead-free double perovskite, X-ray detection, X-ray imaging, Non-destructive testing

Yueteng Zhang, Zan Xu, Xue Bai, Heping Zhao, Jianbei Qiu, Zhiguo Song, Jiayan Liao, Zhengwen Yang. Lead-free Ba₂LaNbO₆: Eu³⁺ phosphors with Bi³⁺-enhanced photochromism for dual-mode X-ray detection and 3D imaging[J]. J. Mater. Sci. Technol., 2025, 235: 156-166.

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Lead-free Ba₂LaNbO₆: Eu³⁺ phosphors with Bi³⁺-enhanced photochromism for dual-mode X-ray detection and 3D imaging

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