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The development of efficient dual-emissive and temperature-sensitive luminescent materials is critical for advancing non-contact optical thermometry. Herein, we employed a co-doping strategy to enhance energy transfer pathways in Ca9Ga(PO4)7 phosphors. Under 331 nm excitation, dual emissions from Eu2+ (415 nm) and Cr3+ (696 nm) were achieved, with Zn2+ enhancing the near-infrared (NIR) of Cr3+. The optimal Cr3+ concentration led to an approximately six-fold increase in NIR emission intensity, attributed to Eu2+-induced crystal field modulation and efficient dipole-dipole energy transfer, which are evidenced by comparing the emission spectra and decay curve lifetimes. Temperature-dependent emission spectra revealed that Eu2+ emission remained stable, while Cr3+ emission exhibited significant temperature sensitivity in Ca9Ga(PO4)7:Zn2+,Eu2+, Cr3+, enabling precise temperature sensing with a peak sensitivity of 1.256 % K-1 at 298 K. This work offers a novel approach to improving energy transfer efficiency and dual-emission properties, contributing to the development of high-performance, real-time optical thermometry and photonic technologies.
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JOURNAL OF LUMINESCENCE
ISSN: 0022-2313
Year: 2025
Volume: 281
3 . 3 0 0
JCR@2023
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ESI Highly Cited Papers on the List: 0 Unfold All
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30 Days PV: 1
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