Perovskite quantum dots are emerging as functional materials for modern optics and optoelectronics due to their superior optical properties and easy integration. In this work, we demonstrated novel perovskite quantum dots based optical Fabry–Pérot (FP) pressure sensor for the first time. By integrating in situ fabricated CsPbBr₃ quantum dots embedded films with distributed Bragg reflectors (DBRs) cavity, we achieved stable narrow band emission with full width at half-maximum of 0.9 nm under continuous wave 405 nm laser illumination. With an external applied pressure, the narrow band emission shows reversible response with high sensitivity of ∼2.2 nm/kPa, good linearity of 0.99, and high spectral resolution of ∼580. Motivated by this discovery, a protype of optical FP pressure sensor system with self-luminous light source was developed for measuring the dynamic mechanical properties of polymeric films, providing alternative technique for low pressure and tactile surface pressure measurement.

中文翻译：

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基于钙钛矿量子点的光学法布里-珀罗压力传感器

钙钛矿量子点因其卓越的光学性能和易于集成而成为现代光学和光电子学的功能材料。在这项工作中，我们首次展示了基于新颖钙钛矿量子点的光学法布里-珀罗（FP）压力传感器。通过原位合成CsPbBr _3进行整合量子点嵌入具有分布式布拉格反射器（DBR）腔的薄膜，我们在连续波405 nm激光照射下实现了稳定的窄带发射，其半峰全宽为0.9 nm。在施加外部压力的情况下，窄带发射显示出可逆的响应，灵敏度高达〜2.2 nm / kPa，线性度高达0.99，光谱分辨率高达580。受此发现的启发，开发了一种具有自发光光源的光学FP压力传感器系统原型，用于测量聚合物膜的动态机械性能，为低压和触觉表面压力测量提供了替代技术。