Development of pyrargyrite Ag3SbS3 absorber films through sulfurization of Ag-Sb stacks for thin-film photovoltaics

带隙 电阻率和电导率 材料科学 微晶 薄膜 开路电压 化学计量学 太阳能电池 光伏 相(物质) 粒度 分析化学(期刊) 制作 化学工程 矿物学 光电子学 纳米技术 冶金 化学 电压 光伏系统 电气工程 有机化学 病理 工程类 替代医学 医学 色谱法
作者
U. Chalapathi,K. Ashok,Salh Alhammadi,Venkateswarlu Gonuguntla,Sambasivam Sangaraju,C. Parthasaradhi Reddy,Ayman A. Ghfar,P. Rosaiah,Youngsuk Suh,Si‐Hyun Park
出处
期刊:Solid State Sciences [Elsevier BV]
卷期号:153: 107560-107560
标识
DOI:10.1016/j.solidstatesciences.2024.107560
摘要

Pyrargyrite Ag3SbS3, which consists of naturally abundant and non-toxic elements, has attracted attention as a promising solar cell material. A two-stage fabrication method was been developed to synthesize Ag3SbS3 thin films through a solid-state reaction between Sb and Ag metallic layers by sulfurizing at 250–350 oC. The Ag3SbS3 film prepared at a sulfurization temperature of 250 oC contained Ag2S and Sb2S3 secondary phases with non-stoichiometric composition, distinct grain growth, a bandgap energy of 1.4 eV, and an electrical resistivity of 5.74x10−4 Ωcm. Through sulfurization of the stacks at 300 oC, the Ag2S and Sb2S3 secondary phases disappeared, and dominant Ag3SbS3 films were obtained with a minor AgSbS2 secondary phase. A compact and uniform near-stoichiometric Ag3SbS3 composition with large grains was obtained with an increased bandgap energy of 1.64 eV and electrical resistivity of 6.19x104 Ωcm. A further increase in the sulfurization temperature to 350 oC resulted in an increase in the crystallite and grain sizes of Ag3SbS3 with a decreased bandgap energy of 1.62 eV and electrical resistivity of 2.90x104 Ωcm. AgSbS2 remained as a minor secondary phase in this film. Thin-film solar cells prepared with the Ag3SbS3 absorber synthesized at a sulfurization temperature of 300 oC exhibited an open-circuit voltage of 473.85 mV, short-circuit current density of 1.47 mA/cm2, fill factor of 41.6%, and an efficiency of 0.3%. These results demonstrate that Ag3SbS3 is a potential candidate for thin-film solar cells.
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