Carbon nanotube-silicon heterojunction solar cells with surface-textured Si and solution-processed carbon nanotube films
Carbon nanotube-silicon heterojunction solar cells with surface-textured Si and solution-processed carbon nanotube films
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DOI：
10.1039/c6ra16132d
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发表时间：
2016-01-01
期刊：
影响因子：
3.9
通讯作者：
Noda, Suguru
中科院分区：
文献类型：
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作者：
Muramoto, Eri;Yamasaki, Yuhei;Noda, Suguru
碳纳米管(CNT)-硅（Si）异质结太阳能电池是用表面织构的硅衬底制备的。使用硅太阳能电池工业中常用的蚀刻剂稀碱性溶液，我们在硅衬底表面形成了金字塔状的纹理。这种结构有效地增强了入射光的吸收，将短路电流密度提高了1.3倍，达到33.1 mA cm（-2）。我们制备的碳纳米管-硅太阳能电池的功率转换效率（PCE）为10.4%，没有任何抗反射涂层或掺杂碳纳米管。此外，采用温和的溶液法制备了商业化碳纳米管团聚体的碳纳米管薄膜，非常适合于制造大面积碳纳米管硅太阳能电池。通过仔细去除表面活性剂并通过硝酸掺杂碳纳米管薄膜，我们还获得了9.57%的扁平电池的PCE。这些发现表明，结合表面织构硅和溶液处理碳纳米管薄膜，可以实现高效和低成本的碳纳米管硅太阳能电池。
Carbon nanotube (CNT)-silicon (Si) heterojunction solar cells are fabricated with surface-textured Si substrates. Using a dilute alkaline solution, common etchant in the Si solar cell industry, we formed a pyramidal texture on the Si substrate surface. The texture effectively enhances the absorption of the incident light, improving the short-circuit current density by similar to 1.3-fold, up to 33.1 mA cm(-2). We fabricated CNT-Si solar cells with a power conversion efficiency (PCE) of 10.4% without any anti-reflective coatings or doping of the CNTs. Moreover, the CNT films were prepared from commercialized CNT agglomerates by a mild solution-based process, which is well suited for the fabrication of CNT-Si solar cells with large area. We also achieved a PCE of 9.57% for a flat cell with careful removal of surfactant from and doping by nitric acid of the CNT films. These findings suggest that with the combination of surface-textured Si and solution-processed CNT films, efficient and low-cost CNT-Si solar cells may be realized.