Citation: Ruijing Fu, Bin Xiao, Haoyuan Weng, Pan Wang, Guangxia Wang, Qingguang Zeng, Dawei Wen, Guanjun Xiao. An optical pressure sensing phosphor of high-sensitivity by soft structure[J]. Chinese Chemical Letters, ;2026, 37(3): 111916. doi: 10.1016/j.cclet.2025.111916 shu

An optical pressure sensing phosphor of high-sensitivity by soft structure

Ruijing Fu ^{a, c} ,
Bin Xiao ^a ,
Haoyuan Weng ^a ,
Pan Wang ^a ,
Guangxia Wang ^{a, *,} ,
Qingguang Zeng ^{a, c, *,} ,
Dawei Wen ^{a, c, *,} ,
Guanjun Xiao ^{b, *,}

a.
School of Applied Physics and Materials, Wuyi University, Jiangmen 529020, China
b.
State Key Laboratory of High Pressure and Superhard Materials, College of Physics, Jilin University, Changchun 130012, China
c.
Institute of Carbon Peaking and Carbon Neutralization, Wuyi University, Jiangmen 529020, China

wangguangxia1107@126.com

zengqg1979@126.com

ontaii@163.com

xguanjun@jlu.edu.cn

Received Date: 24 July 2025
Revised Date: 19 September 2025
Accepted Date: 28 September 2025
Available Online: 29 September 2025

Figures(6)

Luminescent materials function as optical pressure sensors based on pressure-dependent emission. Optical pressure sensors offer a broad measurement range and non-contact operation but face limitations in sensitivity. In this study, we establish a selection principle based on low-dimensional structures and conduct a high-pressure evaluation of xCr³⁺-doped Sr₉Ga_1-x(PO₄)₇ (x = 0.2, 0.5, and 0.8) phosphor, demonstrating its exceptional pressure sensitivity. Upon excitation at 488 nm, Sr₉Ga_0.5(PO₄)₇:0.5Cr³⁺ displays a broad near-infrared emission peak centered at 840 nm. Specifically, the phosphor maintains its structural integrity under pressures up to 10.0 GPa, with a continuous blue shift. The fluorescence peak shifts from 839.5 nm to 757.9 nm, demonstrating a high-pressure sensitivity of 8.11 nm/GPa. These findings establish Sr₉Ga_0.5(PO₄)₇:0.5Cr³⁺ as a viable candidate for optical pressure sensor, thereby offering valuable insights into advancing optical sensor development through host selection.
- High pressure,
- Sr9Ga0.5(PO4)7:0.5Cr3+,
- High-pressure sensitivity,
- Optical pressure sensors,
- Low-dimensional structures
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