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Transparent conductor-embedding nanocones for selective emitters: optical and electrical improvements of Si solar cells

机译:选择性发射器的透明导体嵌入纳米锥:硅太阳能电池的光学和电气改进

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摘要

Periodical nanocone-arrays were employed in an emitter region for high efficient Si solar cells. Conventional wet-etching process was performed to form the nanocone-arrays for a large area, which spontaneously provides the graded doping features for a selective emitter. This enables to lower the electrical contact resistance and enhances the carrier collection due to the high electric field distribution through a nanocone. Optically, the convex-shaped nanocones efficiently reduce light-reflection and the incident light is effectively focused into Si via nanocone structure, resulting in an extremely improved the carrier collection performances. This nanocone-arrayed selective emitter simultaneously satisfies optical and electrical improvement. We report the record high efficiency of 16.3% for the periodically nanoscale patterned emitter Si solar cell.
机译:周期性纳米锥阵列用于高效Si太阳能电池的发射极区域。进行常规的湿法刻蚀工艺以形成大面积的纳米锥阵列,从而自发地为选择性发射极提供了渐变的掺杂特征。由于通过纳米锥的高电场分布,这能够降低电接触电阻并增强载流子的收集。在光学上,凸形纳米锥有效地减少了光反射,并且入射光通过纳米锥结构有效地聚焦到Si中,从而极大地改善了载流子收集性能。这种纳米锥阵列的选择性发射极同时满足了光学和电气方面的改进。我们报告了周期纳米级图案化发射极Si太阳能电池创纪录的16.3%的高效率。

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