Antisolvent-free ambient air-processed CsPbI₂Br Perovskite Solar Cells for Indoor applications

The optical properties of Inorganic perovskite halide CsPbI₂Br make it a promising candidate for its applications in perovskite tandem cell configuration and indoor photovoltaics applications. Here we introduce a facile method for anti-solvent-free, ambient air-processed inorganic film deposition. Our approach results in highly crystalline and uniform films with better device reproducibility. The surface defect passivation through dipoles enables CsPbI₂Br-based solar cells with a stable efficiency of over 16% for pin device configuration. The device efficiency of over 35% under indoor illumination (1000 lux) suggests its potential to power the Internet of Things (IoT). This talk will comprehensively discuss the material's surface chemistry and interfacial dynamics studied using state-of-the-art spectroscopic methods. The long-term device stability will also be addressed.