Performance enhancement of thin film solar cells using silver triangular and rectangular grating on the back electrode

IF 1.1 4区 物理与天体物理 Q4 NANOSCIENCE & NANOTECHNOLOGY
Safa Saminezhad, G. Kiani, Amir Asgharian
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Abstract

Abstract. Thin film solar cells, which are the second generation of solar cells, have recently attracted much attention due to their low cost and abundance of fabrication materials. But due to the reduction in the thickness of the absorber layer in this generation to <0.5  μm, the amount of absorption is greatly reduced and the short circuit current density (Jsh) decreased due to the reduction of the light path length in the semiconductor. Therefore, light trapping is challenging in this generation to compensate for the reduced short circuit current. In this work, crystalline and amorphous silicon thin film solar cells, which are types of thin film solar cells have been investigated. In this study, using silver metal gratings with triangular and rectangular shapes on the back electrode of the solar cell, we investigated the effect of the grating structure on increasing absorption of the solar cell. Crystalline silicon (c-Si) and amorphous silicon (a-Si) have been used as absorber layer material due to their unique characteristics, such as low cost, abundance, and well established. The results show that by applying the optimal structure of grating in crystalline silicon solar cells, compared with the simple solar cell, the efficiency and short current of the cell increased from 8.87% and 16.81 (mA  /  cm2) to 13.34% and 24.78 (mA  /  cm2), respectively. And for the solar cell with amorphous silicon absorber layer, this increase in efficiency and short circuit current has reached from 14.75% and 28.74 (mA  /  cm2) to 15.22% and 29.6 (mA  /  cm2), respectively. This increase in electrical parameters of solar cells illustrates the positive effects of back grating structures in improvement of solar cell performance.
后电极银三角形和矩形光栅对薄膜太阳能电池性能的增强
摘要薄膜太阳能电池作为第二代太阳能电池,以其低廉的成本和丰富的制造材料而备受关注。但由于这一代吸收层厚度减小到<0.5 μm,吸收量大大减少,并且由于半导体中光路长度的减小,短路电流密度(Jsh)降低。因此,在这一代中,光捕获是补偿减少的短路电流的挑战。本文研究了薄膜太阳电池的两种类型——晶体和非晶硅薄膜太阳电池。在本研究中,我们在太阳能电池的后电极上使用三角形和矩形的银金属光栅,研究了光栅结构对增加太阳能电池吸收的影响。晶体硅(c-Si)和非晶硅(a-Si)由于其独特的特性,如低成本,丰富和成熟,已被用作吸收层材料。结果表明,在晶体硅太阳电池中应用最优光栅结构,与简单太阳电池相比,电池的效率和短电流分别从8.87%和16.81 (mA / cm2)提高到13.34%和24.78 (mA / cm2)。对于有非晶硅吸收层的太阳能电池,效率和短路电流分别从14.75%和28.74 (mA / cm2)提高到15.22%和29.6 (mA / cm2)。太阳能电池电学参数的增加说明了背光栅结构在改善太阳能电池性能方面的积极作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Nanophotonics
Journal of Nanophotonics 工程技术-光学
CiteScore
2.60
自引率
6.70%
发文量
42
审稿时长
3 months
期刊介绍: The Journal of Nanophotonics publishes peer-reviewed papers focusing on the fabrication and application of nanostructures that facilitate the generation, propagation, manipulation, and detection of light from the infrared to the ultraviolet regimes.
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