肼溶液处理的Sb2S3，Sb2Se3和Sb2（S（1-x）Se（x））3膜：分子前体识别，膜制造和带隙调整。,Scientific Reports

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肼溶液处理的Sb2S3，Sb2Se3和Sb2（S（1-x）Se（x））3膜：分子前体识别，膜制造和带隙调整。
Scientific Reports ( IF 3.8 ) Pub Date : 2015-Jun-04 , DOI: 10.1038/srep10978
Bo Yang , Ding-Jiang Xue , Meiying Leng , Jie Zhong , Liang Wang , Huaibing Song , Ying Zhou , Jiang Tang

Sb2（S（1-x）Se（x））3（0≤x≤1）化合物已被提出作为有前景的光吸收材料，用于光伏器件。但是，没有关于多晶Sb2（S（1-x）Se（x））3薄膜的合成和表征的系统研究。在这里，使用基于肼的溶液工艺，成功获得了单相Sb2（S（1-x）Se（x））3薄膜。通过拉曼光谱法，我们研究了Sb在肼中的溶解机理：1）Sb和S / Se之间的反应在各自的溶液中产生[Sb4S7]（2-）/ [Sb4Se7]（2-）离子；2）在Sb-S-Se前体溶液中，Sb，S和Se在分子水平上混合，有助于在ab处形成高度均匀的多晶Sb2（S（1-x）Se（x））3薄膜。温度相对较低。UV-vis-NIR透射光谱显示，Sb2（S（1-x）Se（x））3合金膜的带隙与Se浓度x呈二次关系，其方程Eg（x）= 0.118x （2）-0.662x + 1.621eV，其中弯曲参数为0.118 eV。我们的研究为肼溶液处理的Sb2（S（1-x）Se（x））3合金膜中带隙的调整和优化提供有价值的指导，以用于将来制造改进的光伏器件。

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Hydrazine solution processed Sb2S3, Sb2Se3 and Sb2(S(1-x)Se(x))3 film: molecular precursor identification, film fabrication and band gap tuning.

Sb2(S(1-x)Se(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-x)Se(x))3 thin films has been reported. Here, using a hydrazine based solution process, single-phase Sb2(S(1-x)Se(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-x)Se(x))3 thin films at a relatively low temperature. UV-vis-NIR transmission spectroscopy revealed that the band gap of Sb2(S(1-x)Se(x))3 alloy films had a quadratical relationship with the Se concentration x and it followed the equation Eg(x) = 0.118x(2) - 0.662x + 1.621eV, 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-x)Se(x))3 alloy films for the future fabrication of improved photovoltaic devices.

更新日期：2015-06-05

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