Three-dimensional nanopillar-array photovoltaics on low-cost and flexible substrates
Three-dimensional nanopillar-array photovoltaics on low-cost and flexible substrates
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DOI：
10.1038/nmat2493
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发表时间：
2009-08-01
期刊：
影响因子：
41.2
通讯作者：
Javey, Ali
中科院分区：
文献类型：
--
作者：
Fan, Zhiyong;Razavi, Haleh;Javey, Ali
太阳能是最丰富但收获最少的可再生能源之一。近年来，在开发可能大规模部署的光致发光材料方面取得了巨大进展（1-3）。对成本有效的太阳能电池特别感兴趣的是使用新颖的器件结构和材料处理以实现可接受的效率（4-6）。在这方面，在这里，我们报告了直接生长的高度规则，单晶纳米柱阵列的光学活性半导体铝基板上，然后配置为太阳能电池模块。作为一个例子，我们展示了一种光伏结构，它采用了三维的，单晶n-CdS纳米柱，嵌入在多晶薄膜的p-CdTe，使高吸收的光和有效的收集载体。通过实验和建模，我们证明了这种方法的潜力，使高度通用的太阳能模块的刚性和柔性基板与增强的载流子收集效率所产生的纳米柱的几何配置。
Solar energy represents one of the most abundant and yet least harvested sources of renewable energy. In recent years, tremendous progress has been made in developing photovoltaics that can be potentially mass deployed(1-3). Of particular interest to cost-effective solar cells is to use novel device structures and materials processing for enabling acceptable efficiencies(4-6). In this regard, here, we report the direct growth of highly regular, single-crystalline nanopillar arrays of optically active semiconductors on aluminium substrates that are then configured as solar-cell modules. As an example, we demonstrate a photovoltaic structure that incorporates three-dimensional, single-crystalline n-CdS nanopillars, embedded in polycrystalline thin films of p-CdTe, to enable high absorption of light and efficient collection of the carriers. Through experiments and modelling, we demonstrate the potency of this approach for enabling highly versatile solar modules on both rigid and flexible substrates with enhanced carrier collection efficiency arising from the geometric configuration of the nanopillars.