Salutary impact of spontaneous oxidation in CHNHSnI on CZTS-based solar cell.

From the time of discovery, CHNHSnI has been a promising candidate in photovoltaics due to its outstanding optoelectronic properties. However, stabilization was not easy to achieve in CHNHSnI-based solar cells. Because CHNHSnI was used as an absorber, its naturally-occurring self-doping property spontaneously modified band alignment, which increased carrier recombination and decreased the efficiency of solar cell gradually.

Device simulation of highly efficient eco-friendly CHNHSnI perovskite solar cell.

Photoexcited lead-free perovskite CHNHSnI based solar cell device was simulated using a solar cell capacitance simulator. It was modeled to investigate its output characteristics under AM 1.5G illumination.