Breaking the Cross‐Sensitivity Limit: Simultaneous Stress and Temperature Dual‐Mode Sensing Via Colorimetric Mechanoluminescence in SrF 2 :Eu 2+ ,Sm 3+

作者：Yu-Han Jiang, Shuangqiang Fang, Tianchun Lang, Haoliang Cheng, Jiaqi Ou, Lu Yin, Jiali Yu, Tiancheng Zhang, Le Wang · 发表于：Laser & Photonics Review · 年份：2025 · DOI：10.1002/lpor.202501643 · 被引用次数：7 · 研究领域：Luminescence Properties of Advanced Materials、Gas Sensing Nanomaterials and Sensors、Luminescence and Fluorescent Materials

Abstract Mechanoluminescent (ML) materials have emerged as promising candidates for self‐powered sensing systems, yet the simultaneous decoupling of stress and temperature remains a critical challenge. Here, a novel Eu 2+ ,Sm 3+ co‐doped SrF 2 ‐based ML material is presented that enables orthogonal stress‐temperature dual‐parameter sensing through a triboelectricity‐driven ML mechanism. By leveraging the distinct emission behaviors of Eu 2+ (350–550 nm) and Sm 3+ (550–750 nm), the integrated ML intensity exhibits a linear response to stress, while the ML intensity ratio of Eu 2+ and Sm 3+ follows an exponential correlation with temperature, yielding high maximum absolute (0.162 K −1 ) and relative (0.05%·K −1 ) sensitivities. Crucially, this material exhibits a unique ML property: ML color changes exclusively with the single parameter ‐ temperature, while the integral ML intensity corresponds to the magnitude of force. Thus, using OpenCV visual recognition, temperature signals can be independently decoupled within a complicated force‐temperature conditions, eliminating cross‐sensitivity. A graded alarm system based on Hue, Saturation and Value chromaticity analysis validates its capacity of real‐time, non‐contact temperature monitoring in simulated industrial scenarios. This work establishes a paradigm for dual‐mode optical decoupling in ML materials, advancing applications in precise perception of various parameters in a multi‐physics field coupling environment.