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Surface roughness effect on characteristics of Si nanowire solar cell
Journal of Photonics for Energy ( IF 1.7 ) Pub Date : 2020-11-24 , DOI: 10.1117/1.jpe.10.045502
Amr Hisham K. Mahmoud 1 , Fatma M. H. Korany 1 , Christen Tharwat 2 , Mohamed Hussein 1 , Mohamed A. Swillam 3 , Salah Sabry A. Obayya 1 , Mohamed Farhat O. Hameed 1
Affiliation  

Abstract. The characteristics of silicon nanowires (SiNWs) with surface roughness are reported and analyzed for solar cell (SC) applications. The SiNWs are fabricated using a metal-assisted chemical etching process. The effects of the etching time and reaction temperature on the surface roughness and the performance of the SiNWs are investigated. Further, the optical and electrical characteristics of the roughed NW SC are numerically studied and optimized using 3D finite difference time domain and finite element analysis, respectively. The numerically optimized SiNWs with surface roughness offer high optical ultimate efficiency (η) of 32.51% with an enhancement of 15.98% over the smoothed SiNW. This is due to the surface textures of the nanowires which produce multiple light scattering between the NWs’ walls. This will enhance the optical path length through the NW and enrich its light absorption. The doping level of the surface roughness of NWs with p-type/intrinsic/n-type (p-i-n) axial configurations is also simulated to compute the optoelectronic performance of the suggested design. The p-i-n axial doped design offers a power conversion efficiency of 14.92%, whereas the conventional NWs have a power conversion efficiency of 13.16%.

中文翻译:

表面粗糙度对硅纳米线太阳能电池特性的影响

摘要。报告并分析了具有表面粗糙度的硅纳米线 (SiNW) 的特性,用于太阳能电池 (SC) 应用。SiNW 是使用金属辅助化学蚀刻工艺制造的。研究了蚀刻时间和反应温度对表面粗糙度和 SiNW 性能的影响。此外,分别使用 3D 有限差分时域和有限元分析对粗糙 NW SC 的光学和电气特性进行了数值研究和优化。具有表面粗糙度的数值优化的 SiNW 提供了 32.51% 的高光学极限效率 (η),比平滑的 SiNW 提高了 15.98%。这是由于纳米线的表面纹理会在 NW 的壁之间产生多次光散射。这将增加通过 NW 的光程长度并丰富其光吸收。还模拟了具有 p 型/本征/n 型(pin)轴向配置的 NW 表面粗糙度的掺杂水平,以计算建议设计的光电性能。引脚轴向掺杂设计的功率转换效率为 14.92%,而传统 NW 的功率转换效率为 13.16%。
更新日期:2020-11-24
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