In-Depth Examination of CIGS (Copper, Indium, Gallium, Selenium) Layer Properties for Enhanced Solar Cell Performance

Abstract The analysis and modeling of the CIGS layer using impedance spectroscopy is crucial for understanding and enhancing the performance of CIGS-based solar cells. Impedance spectroscopy characterizes the electrical and optical properties of materials across a range of frequencies, providing insights into charge transport processes, recombination mechanisms, and diffusion phenomena within the CIGS layer. This technique enables the determination of key electrical and optical parameters, such as resistance, capacitance, and impedance of the layer. By applying this model to experimental impedance spectroscopy data, researchers can extract specific parameters related to cell performance, including series resistance, shunt resistance, and charge carrier mobility. Ultimately, the comprehensive analysis and modeling of the CIGS layer through impedance spectroscopy deepens our understanding of charge transport mechanisms and its electrical properties. This knowledge is instrumental in continuously improving their performance and advancing photovoltaic technology.