Optoelectronic simulation of a four-terminal all-inorganic CsPbI3/CZTSSe tandem solar cell with high power conversion efficiency. Issue 37 (16th September 2022)

• Record Type: Journal Article
• Authors: Wang, Dan; Yao, Shunwei; Zhong, Yening; Peng, Lin; Shi, Tingting; Chen, Jin; Liu, Xiaolin; Lin, Jia
• Is Part Of: Physical chemistry chemical physics. Volume 24:Issue 37(2022)
• Page Start: 22746
• Page End: 22755
• Publication Date: 2022-09-16
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d2cp02302d
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A four-terminal CsPbI3 /CZTSSe tandem solar cell was simulated, affording a summed power conversion efficiency of 32.35%. The study provides a promising reference for designing high-efficiency solar cells. Abstract : Tandem solar cells based on perovskites have been gaining ever-increasing attention for applications in photovoltaics. Here, we stack the wide-bandgap CsPbI3 top subcell with the low-bandgap Kesterite Cu2 ZnSnS x Se(4− x ) (CZTSSe) bottom subcell mechanically to form a four-terminal tandem solar cell. The thickness of the CsPbI3 and CZTSSe layers, as well as the thickness of ZnO/ZnS and Spiro-OMeTAD layers are optimized to achieve significantly improved absorption, thereby reducing reflection loss and parasitic absorption. The doping concentration on CsPbI3 and CZTSSe is investigated to equalize open-circuit voltage and short-circuit current. The energy band-bending and built-in electrical field correlated with carrier separation are discussed. The simulated four-terminal CsPbI3 /CZTSSe tandem solar cell affords a summed PCE of 32.35%. The study of the CsPbI3 /CZTSSe tandem solar cell provides a promising reference for designing high-performance devices.