Numerical Simulation of NH 3 (CH 2 ) 2 NH 3 MnCl 4 Based Pb-Free Perovskite Solar Cells Via SCAPS-1D.

Recently, the design and fabrication of lead (Pb)-free perovskite or perovskite-like materials have received great interest for the development of perovskite solar cells (PSCs). Manganese (Mn) is a less toxic element, which may be an alternative to Pb. In this work, we explored the role of NH 3 (CH 2 ) 2 NH 3 MnCl 4 perovskite as a light absorber layer via SCAPS-1D. A Pb-free PSC device (FTO/TiO 2 /NH 3 (CH 2 ) 2 NH 3 MnCl 4 /spiro-OMeTAD/Au) was simulated via SCAPS-1D software. The simulated Pb-free PSCs (FTO/TiO 2 /NH 3 (CH 2 ) 2 NH 3 MnCl 4 /spiro-OMeTAD/Au) showed decent power conversion efficiency (PCE) of 20.19%. Further, the impact of the thickness of absorber (NH 3 (CH 2 ) 2 NH 3 MnCl 4 ), electron transport (TiO 2 ), and hole-transport (spiro-OMeTAD) layers were also investigated. Subsequently, various electron transport layers (ETLs) were also introduced to investigate the role of ETL. In further studies, an NH 3 (CH 2 ) 2 NH 3 MnCl 4 -based PSC device (FTO/TiO 2 /NH 3 (CH 2 ) 2 NH 3 MnCl 4 /spiro-OMeTAD/Au) was also developed (humidity = ~30-40%). The fabricated PSCs displayed an open circuit voltage (Voc) of 510 mV with a PCE of 0.12%.