Comparison between Cu(In, Ga)Se2 solar cells with different back contacts submitted to current stress. (November 2022)

• Record Type: Journal Article
• Authors: Bertoncello, M.; Barbato, M.; Caria, A.; Buffolo, M.; De Santi, C.; Rampino, S.; Pattini, F.; Spaggiari, G.; Trivellin, N.; Vogrig, D.; Zanoni, E.; Meneghesso, G.; Meneghini, M.
• Is Part Of: Microelectronics and reliability. Volume 138(2022)
• Publication Date: 2022-11
• Subjects: CIGS solar cells -- Mo substrate -- ITO substrate -- Pulsed forward current stress; Electronic apparatus and appliances -- Reliability -- Periodicals; Miniature electronic equipment -- Periodicals; Appareils électroniques -- Fiabilité -- Périodiques; Équipement électronique miniaturisé -- Périodiques; Electronic apparatus and appliances -- Reliability; Miniature electronic equipment; Periodicals; 621.3815
• DOI: 10.1016/j.microrel.2022.114612
• Languages: English
• ISSNs: 0026-2714

Abstract

Abstract: The main goal of this paper is to compare the stability over time of two different kinds of Cu( In, Ga )Se2 solar cells: the first is designed with a molybdenum back contact, the second has a semi-transparent back contact based on ITO (Indium Tin Oxide). To achieve this goal, we subjected two different samples to a forward pulse current stress during which the main electric cell parameters (i.e. Isc, Voc, PCE, IV characteristic) were monitored. Based on the collected results, we propose a physical interpretation to explain the different behaviours shown by the samples during degradation. Highlights: A comparison between two different substrates of CIGS solar cells is presented. This paper presents an evaluation of the impact of ageing of CIGS solar cells. The investigation is conducted with a forward pulse current stress. Light IV, dark IV and the main electrical cell parameters are shown.