LAUSR

With the surge in perovskite research, practical features for future applications are like to be secured, but the reliability of the materials and the use of hazardous Pb are longstanding problems. Here, an air-stable Cs2 SnI6 (CSI) is prepared via diluted hydriodic acid solvent-based precursor optimization during scalable hydrothermal growth. Materials characterization is performed using various elemental peak analyses and crystallographic identification. The resulting CSI exhibits long-term operating stability over 6 months, (i) at elevated temperatures, (ii) in ambient air, and (iii) under light illumination from UV to near-infrared. More importantly, to demonstrate an intriguing class of application up to system level, physically detachable CSI photodetector arrays (PD-arrays), integrated with micro-light emitting diodes (μ-LEDs) arrays, are successfully implemented. In addition, 3 × 3 flexible CSI PDs are fully operational, even in the air, and their spatial uniformity in pixels is quantitatively evaluated. The charge transport mechanisms of the CSI PDs under light and elevated temperature are assessed via temperature-dependent characterization from 148 K to 373 K, implying the involvement of 3D variable-range hopping. Multi-cycle evaluation of the CSI PD-arrays confirms their operational stability in AC and DC mode, demonstrating this platform's potential benefit for wireless optical interconnection in advanced Si technology. This article is protected by copyright. All rights reserved.