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Updated: Jul 5, 2026
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
Fotodetector de base perovskita sin plomo de alto rendimiento para detección de baja intensidad de luz en
Richa Srivastava1, Sudhanshu Verma1, Akhilesh Kumar Chaudhary1
1Department of Electronics and Communication Engineering, Madan Mohan Malaviya University of Technology, Gorakhpur, Uttar Pradesh, India.
Abstract:
This work presents a comprehensive numerical study on a lead-free, tin-based perovskite photodetector (PPD) designed for low-light biomedical sensing applications. Using CH3NH3SnBr3 as the active absorber layer, we model a device architecture comprising FTO/CdZnS/CH3NH3SnBr3/Spiro-OMeTAD/Au, optimizing key parameters through combined SCAPS-1D and COMSOL Multiphysics simulations. We systematically investigate the influence of absorber thickness, defect density, donor doping, electric field distribution, series and shunt resistance, and interface properties to maximize optoelectronic performance. The optimized PPD achieves a peak responsivity of 0.55 A/W and a detectivity of 9.7 × 1014 Jones within the red-light spectral window (680-790 nm), demonstrating enhanced charge carrier lifetimes and effective interfacial charge extraction. These results highlight the potential of CH3NH3SnBr3 as an eco-friendly alternative to lead-based perovskites, advancing the development of high-sensitivity, low-illumination photodetectors for biomedical imaging and diagnostics.
