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In this study, Y3Al3MgSiO12:Ni2+ and Y3Al3MgSiO12:Cr3+–Ni2+ phosphors were synthesized. Compared to previous reports, the Y3Al3MgSiO12:Cr3+–Ni2+ phosphor in this study achieved three significant advancements: (1) efficient energy transfer from Cr3+ to Ni2+ was achieved (η = 91.6%), resulting in a 10.45-fold enhancement of SWIR emission intensity upon 438 nm blue-light excitation, and the optimal excitation wavelength was shifted to the blue-light region. (2) Ultra-broadband continuous emission spanning the NIR-I to NIR-III regions, with an exceptionally wide FWHM (185 + 311 nm), was achieved in this phosphor. (3) Remarkably high thermal stability was achieved for the NIR-II–III emission in a region where strong electron–phonon coupling and poor thermal stability are typically observed. The underlying mechanism was elucidated through analysis of the crystal structure rigidity and the Huang–Rhys factor (S). A SWIR pc-LED device was further fabricated by integrating the phosphor with a 450 nm blue LED chip, confirming its application potential in covert information recognition and nondestructive detection scenarios. This study not only introduces a broadband SWIR-emitting material system excitable by blue light but also provides a novel strategy for developing efficient and thermally stable SWIR phosphors.

権利情報:

• In Copyright
  

キーワード: Garnet, Ultra-broad luminescence, Cr3+/Ni2+ codoping, Energy transfer

刊行年月日: 2025-10-11

出版者: Royal Society of Chemistry (RSC)

掲載誌:

• Inorganic Chemistry Frontiers (ISSN: 20521553) vol. 13 p. 286-301

研究助成金:

• Department of Education of Liaoning Province JYTMS20231627
• Liaoning Revitalization Talents Program Grant No. XLYC2403017

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.6196

公開URL: https://doi.org/10.1039/D5QI01841B

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更新時刻: 2026-04-30 12:01:11 +0900

MDRでの公開時刻: 2026-10-11 08:20:54 +0900