Carrier transport and surface potential over phase variations in the surface and bulk of highly efficient Cu2ZnSn(S,Se)4 solar cells,Progress in Photovoltaics

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Carrier transport and surface potential over phase variations in the surface and bulk of highly efficient Cu2ZnSn(S,Se)4 solar cells
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2020-01-24 , DOI: 10.1002/pip.3248
Juran Kim ₁ , Jayeong Kim ₁ , Eunji Ko ₁ , Seokhyun Yoon ₁ , Jun‐Hyoung Sim ₂ , Kee‐Jeong Yang ₂ , Dae‐Hwan Kim ₂ , Jin‐Kyu Kang ₂ , Yu Jin Song ₃ , Chan‐Wook Jeon ₃ , William Jo ₁

Affiliation

We report highly efficient Cu₂ZnSn(S,Se)₄ (CZTSSe) thin films with a power conversion efficiency (PCE) of 12.3% at their surface and interface. The structural and electrical properties were locally investigated, using scanning probe microscopy and micro‐Raman scattering, to improve the performance of kesterite solar cells. Interestingly, this research reports quite different results from the conventional kesterite solar cells, owing to the observance of undesirable voids and secondary phases. Nonetheless, the solar cells exhibit a high PCE of over 12%. Thus, we probe the kesterite solar cells as a function of the depth and introduce a mechanical dimple‐etching process. The relatively low melting temperature of the pure‐metal precursors results in the unique properties within the solar cell materials. Understanding these phenomena and their effects on carrier behavior enables the achievement of a higher PCE and better performance for kesterite solar cells.

中文翻译：

高效Cu2ZnSn（S，Se）4太阳能电池表面和体积中相变的载流子传输和表面电势

我们报告了高效的Cu ₂ ZnSn（S，Se）₄（CZTSSe）薄膜，其表面和界面的功率转换效率（PCE）为12.3％。使用扫描探针显微镜和显微拉曼散射对结构和电性能进行了局部研究，以改善钾长石太阳能电池的性能。有趣的是，由于观察到不希望有的空隙和第二相，该研究报告的结果与常规的硅藻土太阳能电池完全不同。尽管如此，太阳能电池仍具有超过12％的高PCE。因此，我们研究了作为深度函数的硅藻土太阳能电池，并引入了机械凹痕蚀刻工艺。纯金属前体的较低熔化温度导致太阳能电池材料具有独特的性能。

更新日期：2020-01-24

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