Physically Detachable and Operationally Stable Cs2SnI6 Photodetector Arrays Integrated with µ‐LEDs for Broadband Flexible Optical Systems

• DOI: 10.1002/adma.202109673
• Publication Date: 2022-03-05T03:39:44Z
• Authors: Mokurala Krishnaiah; Seungyeob Kim; Ajit Kumar; Dhananjay Mishra; Seung Gi Seo; Sung Hun Jin
• Keywords: Characterization

With the surge in perovskite research, practical features for future applications are desired to be secured, but reliability of materials and use hazardous Pb 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 performed using various elemental peak analyses crystallographic identification. The resulting CSI exhibits long-term operating stability over 6 months, i) at elevated temperatures, ii) ambient air, iii) under light illumination from UV near-infrared. More importantly, demonstrate intriguing class up system level, physically detachable photodetector arrays (PD-arrays), integrated with micro-light-emitting-diodes (μ-LEDs) arrays, successfully fabricated. In addition, 3 × flexible PDs fully operational, even their spatial uniformity pixels quantitatively evaluated. charge-transport mechanisms temperature assessed temperature-dependent 148 373 K, implying involvement 3D variable-range hopping. Multicycle evaluation PD-arrays confirms operational AC DC modes, demonstrating this platform's potential benefit wireless optical interconnection advanced Si technology.