Full solar spectrum energy harvesting with CuInSe₂ based photovoltaic cell: Device simulation and impedance spectroscopy analysis

초록

In this work, solar cell based on CuInSe2 is designed and simulated utilizing SCAPS-1D software. Our design incorporated an electron transport layer (ZnSe) and aback surface field layer (WSe2), which are found to be highly effective. This architectural design effectively utilizes the entire solar spectrum ranging from 300 nm to 1100 nm and successfully achieves high efficiency under intruding conditions. The conversion efficiency is improved by adjusting the thickness of ITO, ZnSe, CuInSe2, and WSe2, as well as addressing bulk defects and interface defects. An analysis is conducted on the generation rate, recombination rate, and electrical parameters of the device. The structure ITO/ZnSe/CuInSe2/WSe2/Au demonstrates impressive performance with a power conversion efficiency of 32.89%, a short-circuit current density of 40.01 mA/cm2, an open- circuit voltage of 0.9428 V, and a fill factor of 87.20%. Through an examination of a relationship between temperature and complex impedance, we observed a decrease in impedance with increasing temperature, which led to a corresponding increase in conductance. Therefore, our findings offer significant insights into their frequency-dependent electrical behavior, highlighting potential pathways for enhanced device performance.

키워드