Work

Effect of High Monochromatic Radiation on the Electrical Performance of CIGS Solar Cell

Year: 2024

Type: article

Abstract: In this article, we investigate the optically induced degradation of Cu(InGa)Se2(CIGS) solar cells subjected to monochromatic laser irradiation. The devices under test are bifacial CIGS solar cells, fabricated on fluorine-doped SnO2glass substrates. The electrical properties under dark and illumination conditions were characterized before laser exposure. The analysis of the current–voltage characteristics indicated that defect-assisted carrier transport dominates within the space charge region. Continuous laser exposure at constant optical power caused a decrease in open-circuit voltage (Voc). The study of the dark current–voltage curves highlights a change in the saturation current (IS) and ideality factor (n), whose increment follows a square-root dependence on time. This behavior is attributed to diffusion of Na ions toward the junction. Conversely, theVocdecay (which is correlated with the turn-onvoltage decrease in darkI–Vcurve) is ascribed to a light-induced defect generation that enhances leakage current at the CdS/CIGS interface.

Source: IEEE Journal of Photovoltaics

DOI: 10.1109/jphotov.2024.3492281