Advanced mechanisms, innovative designs, and optimized simulations of electron transport channels toward enhance performance in Sb₂S₃ solar cells

Abstract

Sb₂S₃ films are susceptible to the formation of nanogap defects during the crystallization process, leading to their experimental power conversion efficiency (PCE) falling significantly short of the theoretical limit. This investigation presents, a groundbreaking Sb₂S₃ photovoltaic device model that integrates perovskite within these nanogaps, and systematically examines the mechanisms for enhancing the PCE. Our findings reveal that incorporating perovskite within the nanogaps yields a 10% enhancement in optical absorption performance. Furthermore, perovskite nanogaps function as effective electron transport channels, significantly reducing the recombination of photogenerated carriers within the highly defective Sb₂S₃. The dimensions and arrangement of the nanochannels play a pivotal role in determining device performance, with optimal measurements of 5 nm in width and 15 nm in spacing. Additionally, this study examines the universality of the nanochannel structure. The projected PCE of this innovative structure is an impressive 25.40%. These findings provide valuable theoretical guidance for designing high-efficiency Sb₂S₃ solar cells.

Keywords

Sb₂S₃ solar cells / perovskite / nanogaps / electron transport channels

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Central South University