Researchers at the Indian National Institute of Technology (NIT) in Silchar, Assam have designed a perovskite solar cell based on a formamidinium tin iodide (FASnI3) active layer. It could potentially achieve a power conversion efficiency of 31.57% while scoring well in other performance parameters as well.
Researchers at the National Institute of Technology (NIT), Silchar, Assam, India have designed a formamidinium tin iodide (FASnI3) perovskite solar cell with a potential power conversion efficiency of 31.57%.
They constructed the cell from a fluorine-doped tin oxide (TFO) substrate, a zinc oxide (ZnO) electron transport layer, a FASnI3 absorber, a nickel oxide (NiO) hole transport layer (HTL), and a gold (Au) metal contact. .
The proposed Au/NiO/FASnI3/ZnO0.25S0.75/FTO solar cell structure revealed exceptional open-circuit voltage of 1.2419 V, short-circuit current density of 28.35 mA/cm2 and fill factor of 89.64% and power conversion efficiency of 31.57%.
The researchers designed and studied the device structure using a SCAPS-1D solar cell capacitance simulator under AM 1.5G illumination, 1000 W/m2 input power and 300 K temperature.
The performance parameters of the proposed solar cell device structure were investigated by varying the active layer (FASnI3) thickness, defect density and doping concentration; and variations in thickness, electron affinity, and doping concentration of NiO HTL and ZnO0.25S0.75 ETL for better performance. In addition, they examined the effect of series and shunt resistance and temperature on the performance parameters of the proposed solar cell device structure.
“Variations of FASnI3 parameters revealed that to achieve high solar cell efficiency, we want optimal FASnI3 thickness, defect density and doping concentration, which facilitates proper photon absorption and limited non-radiative recombinations,” said Robin Khosla, member. research group and assistant professor at National Institute of Technology (NIT) Silchar in an interview pv magazine.
Scientists shared their research Results in Optics. The research team included Robin Khosla, Srinivas Mattaparthi, Dipesh K. Sinha and Aditya Bhura.