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首页> 外文期刊>ACS Omega >Aqueous-Solution-Processed Cu2ZnSn(S,Se)4 Thin-Film Solar Cells via an Improved Successive Ion-Layer-Adsorption–Reaction Sequence
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Aqueous-Solution-Processed Cu2ZnSn(S,Se)4 Thin-Film Solar Cells via an Improved Successive Ion-Layer-Adsorption–Reaction Sequence

机译：通过改进的连续离子层吸附反应序列的水溶处理Cu 2 ZnSn（S，Se） 4 薄膜太阳能电池

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摘要

A facile improved successive ionic-layer adsorption and reaction (SILAR) sequence is described for the fabrication of Cu_(2)ZnSn(S,Se)_(4) (CZTSSe) thin-film solar cells (TFSCs) via the selenization of a precursor film. The precursor films were fabricated using a modified SILAR sequence to overcome compositional inhomogeneity due to different adsorptivities of the cations (Cu~(+), Sn~(4+), and Zn~(2+)) in a single cationic bath. Rapid thermal annealing of the precursor films under S and Se vapor atmospheres led to the formation of carbon-free Cu_(2)ZnSnS_(4) (CZTS) and CZTSSe absorber layers, respectively, with single large-grained layers. The best devices based on CZTS and CZTSSe absorber layers showed total area (～0.30 cm~(2)) power conversion efficiencies (PCEs) of 1.96 and 3.74%, respectively, which are notably the first-demonstrated efficiencies using a modified SILAR sequence. Detailed diode analyses of these solar cells revealed that a high shunt conductance (G _(sh)), reverse saturation current density (J _(o)), and ideality factor (n _(d)) significantly affected the PCE, open-circuit voltage (V _(oc)), and fill factor (FF), whereas the short-circuit current density (J _(sc)) was dominated by the series resistance (R _(s)) and G _(sh). However, the diode analyses combined with the compositional and interface microstructural analyses shed light on further improvements to the device efficiency. The facile layer-by-layer growth of the kesterite CZTS-based thin films in aqueous solution provides a great promise as an environmentally benign pathway to fabricate a variety of multielement-component compounds with high compositional homogeneities.
机译：描述了一种通过将硒化硒化铜制备Cu_（2）ZnSn（S，Se）_（4）（CZTSSe）薄膜太阳能电池（TFSC）的改进的连续离子层吸附和反应（SILAR）序列。前体膜。使用修饰的SILAR序列制造前体薄膜，以克服由于在单个阳离子浴中阳离子（Cu〜（+），Sn〜（4+）和Zn〜（2+））的不同吸附性而导致的成分不均匀性。前驱体膜在S和Se蒸气气氛下的快速热退火导致分别形成具有单个大晶粒层的无碳Cu_（2）ZnSnS_（4）（CZTS）和CZTSSe吸收层。基于CZTS和CZTSSe吸收层的最佳器件的总面积（〜0.30 cm〜（2））功率转换效率（PCE）分别为1.96和3.74％，这是使用改进的SILAR序列首次展示的效率。对这些太阳能电池的详细二极管分析显示，并联电导率高（i G_（sh）），反向饱和电流密度（iJ_（o））和理想因子（ni（d） ））对PCE，开路电压（ V _（oc））和填充系数（FF）有显着影响，而短路电流密度（ J _（sc））主要由串联电阻（ R _（s））和 G _（sh）。但是，二极管分析与成分和界面微结构分析相结合，为进一步提高器件效率提供了启示。在水溶液中以星状CZTS为基础的薄膜的轻松逐层生长，为制造各种具有高组成均质性的多元素组分化合物提供了一种对环境有益的途径，这提供了广阔的前景。

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