文章基本信息

标题：Hydrazine solution processed Sb₂S₃, Sb₂Se₃ and Sb₂(S_1−xSe_x)₃ film: molecular precursor identification, film fabrication and band gap tuning
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作者：Bo Yang ; Ding-Jiang Xue ; Meiying Leng 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2015
卷号：5
DOI：10.1038/srep10978
出版社：Springer Nature
摘要：Sb₂(S_1−xSe_x)₃ (0 ≤ x ≤ 1) compounds have been proposed as promising light-absorbing materials for photovoltaic device applications. However, no systematic study on the synthesis and characterization of polycrystalline Sb₂(S_1−xSe_x)₃ thin films has been reported. Here, using a hydrazine based solution process, single-phase Sb₂(S_1−xSe_x)₃ films were successfully obtained. Through Raman spectroscopy, we have investigated the dissolution mechanism of Sb in hydrazine: 1) the reaction between Sb and S/Se yields [Sb₄S₇]^2-/[Sb₄Se₇]^2- ions within their respective solutions; 2) in the Sb-S-Se precursor solutions, Sb, S, and Se were mixed on a molecular level, facilitating the formation of highly uniform polycrystalline Sb₂(S_1−xSe_x)₃ thin films at a relatively low temperature. UV-vis-NIR transmission spectroscopy revealed that the band gap of Sb₂(S_1−xSe_x)₃ alloy films had a quadratical relationship with the Se concentration x and it followed the equation , where the bowing parameter was 0.118 eV. Our study provides a valuable guidance for the adjustment and optimization of the band gap in hydrazine solution processed Sb₂(S_1−xSe_x)₃ alloy films for the future fabrication of improved photovoltaic devices.