Efficient light trapping nanopyramid structures for solar cells patterned using UV nanoimprint lithography
Efficient light trapping nanopyramid structures for solar cells patterned using UV nanoimprint lithography
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DOI：
10.1016/j.mssp.2016.09.032
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发表时间：
2017-01-01
影响因子：
4.1
通讯作者：
Alkaisi, Maan M.
中科院分区：
文献类型：
--
作者：
Amalathas, Amalraj Peter;Alkaisi, Maan M.
在本文中，我们证明周期性倒置纳米金字塔结构除了具有自清洁功能外，还可以通过最大限度地减少反射、改善光捕获过程来提高单晶硅太阳能电池的功率转换效率。使用紫外纳米压印光刻在单晶硅太阳能电池表面上制造周期性倒置纳米金字塔结构。通过在单晶硅太阳能电池正面引入倒纳米金字塔结构，与相同的没有制绒的太阳能电池相比，功率转换效率提高了11.73%。倒置纳米金字塔涂层降低了反射率，并在较宽的波长范围内提高了外部量子效率。此外，由于纳米结构图案和自组装单层涂层导致接触角增加，太阳能电池的表面表现出疏水性。增强的疏水性为太阳能电池提供了额外的自清洁功能。这些结果表明，周期性倒置纳米金字塔结构在提高硅太阳能电池的性能方面具有很大的潜力，并且可以应用于不同类型的太阳能电池。
In this paper, we demonstrate that periodic inverted nanopyramid structures can enhance the power conversion efficiency of monocrystalline silicon solar cells by minimizing reflections, improving light trapping process in addition to its self-cleaning functionality. The periodic inverted nanopyramid structures were fabricated on monocrystalline silicon solar cell surfaces using a UV nanoimprint lithography. By introducing inverted nanopyramid structures on the front side of the monocrystalline silicon solar cells, the power conversion efficiency was improved by 11.73% compared to identical solar cells without the texturing. The inverted nanopyramid coating decreased the reflectance and increased the external quantum efficiency over a broad wavelength range. Moreover, the surface of the solar cells exhibited hydrophobic properties due to increased contact angle caused by the nanostructure patterns and the self-assembled monolayer coating. The enhanced hydrophobicity provided the solar cells with an added self-cleaning functionality. These results suggest that the periodic inverted nanopyramid structures has high potential in improving the performance of silicon solar cells and may be applied to different types of solar cells.