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Improving the performance of Sb<sub>2</sub>Se<sub>3</sub> thin film solar cells over 4% by controlled addition of oxygen during film deposition

Xinsheng LiuWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 ChinaChao ChenWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 ChinaLiang WangWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 ChinaJie ZhongWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 ChinaMiao LuoWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 ChinaJie ChenWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 ChinaDing‐Jiang XueWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 ChinaDeng‐Bing LiYing ZhouJiang TangWuhan National Laboratory for Optoelectronics (WNLO) and School of Optical and Electronic Information Huazhong University of Science and Technology (HUST) Wuhan 430074 China

2015en

ABI

Annotatsiya

Abstract Sb 2 Se 3 has attracted great research interest very recently as a promising absorber material for thin film photovoltaics due to its suitable bandgap, high absorption coefficient, and non‐toxic, low cost, and earth abundant nature. In this work, a significant efficiency improvement to 4.8% of superstrate cadmium sulfide (CdS)/Sb 2 Se 3 solar cells is obtained by the controlled addition of oxygen during thermal evaporation of Sb 2 Se 3 films. Systematic materials and device physics characterization reveal that oxygen addition during Sb 2 Se 3 film evaporation significantly improves the CdS/Sb 2 Se 3 heterojunction quality through effective passivation of interfacial defect states, resulting in a substantial enhancement in device circuit voltage and short circuit current density. The 4.8% device is the highest efficiency thus far reported for Sb 2 Se 3 thin film solar cells. Copyright © 2015 John Wiley & Sons, Ltd.

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Identifikatorlar

DOI: 10.1002/pip.2627

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