Mechanical Grinding Driven Engineering Enables High-Performance CsPbBr₃ Perovskite Photodetectors

We overcome the drawback of low solubility of the CsPbBr ₃ perovskite through the mechanical grinding driven engineering, and achieve high-quality CsPbBr ₃ perovskite thin films. Photodetectors based on these films exhibit superior device performance, such as a responsivity of 0.219 A/W, a detectivity of 5.3×10 ¹¹ Jones, and the response time of less than 50 μs. Additionally, the devices demonstrate excellent storage stability and thermal stability. This work provides a new approach to the fabrication of high-quality perovskite polycrystalline film devices.