Electrodeposition of crystalline silicon films from silicon dioxide for low-cost photovoltaic applications
Electrodeposition of crystalline silicon films from silicon dioxide for low-cost photovoltaic applications
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DOI：
10.1038/s41467-019-13065-w
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发表时间：
2019-12
影响因子：
16.6
通讯作者：
X. Zou;L. Ji;Jianbang Ge;D. Sadoway;E. Yu;A. Bard
中科院分区：
文献类型：
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作者：
X. Zou;L. Ji;Jianbang Ge;D. Sadoway;E. Yu;A. Bard
在过去的几十年里，晶体硅太阳能电池一直主导着光伏市场。长期存在的挑战之一是硅晶片成本对整体模块成本的巨大贡献。在这里，我们展示了一个简单的过程，使高纯度的太阳能级硅薄膜直接从二氧化硅通过一步电沉积过程中熔盐可能的光伏应用。通过改变电沉积条件，可以沉积出厚度和掺杂类型可调的高纯硅薄膜。通过光电化学测量，这些电沉积硅膜显示出商业硅晶片的约40至50%的光电流密度，并且作为太阳能电池，最高功率转换效率为3.1%。与传统的太阳能级硅片生产工艺相比，这种方法大大降低了资金成本和能源消耗，为低成本硅太阳能电池生产提供了一种有前途的策略。
Crystalline-silicon solar cells have dominated the photovoltaics market for the past several decades. One of the long standing challenges is the large contribution of silicon wafer cost to the overall module cost. Here, we demonstrate a simple process for making high-purity solar-grade silicon films directly from silicon dioxide via a one-step electrodeposition process in molten salt for possible photovoltaic applications. High-purity silicon films can be deposited with tunable film thickness and doping type by varying the electrodeposition conditions. These electrodeposited silicon films show about 40 to 50% of photocurrent density of a commercial silicon wafer by photoelectrochemical measurements and the highest power conversion efficiency is 3.1% as a solar cell. Compared to the conventional manufacturing process for solar grade silicon wafer production, this approach greatly reduces the capital cost and energy consumption, providing a promising strategy for low-cost silicon solar cells production.