Miniaturization of InGaP/InGaAs/Ge solar cells for micro-concentrator photovoltaics,Progress in Photovoltaics

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Miniaturization of InGaP/InGaAs/Ge solar cells for micro-concentrator photovoltaics
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2021-05-06 , DOI: 10.1002/pip.3421
Pierre Albert _{1,

2,

3} , Abdelatif Jaouad _{1,

2} , Gwenaëlle Hamon _{1,

2} , Maïté Volatier _{1,

2} , Christopher E. Valdivia ₄ , Yannick Deshayes ₃ , Karin Hinzer ₄ , Laurent Béchou _{1,

2,

3} , Vincent Aimez _{1,

2} , Maxime Darnon _{1,

2}

Affiliation

Micro-concentrator photovoltaic (CPV), incorporating micro-scale solar cells within concentrator photovoltaic modules, promises an inexpensive and highly efficient technology that can mitigate the drawbacks that impede standard CPV, such as resistive power losses. In this paper, we fabricate micro-scale multijunction solar cells designed for micro-CPV applications. A generic process flow, including plasma etching steps, was developed for the fabrication of complete InGaP/InGaAs/Ge microcells with rectangular, circular, and hexagonal active areas down to 0.089 mm² (0.068-mm² mesa). Large cells (>1 mm²) demonstrate good electrical performance under one sun AM1.5D illumination, but a degradation in the open-circuit voltage (V_OC) is observed on the smallest cells. This effect is attributed to perimeter recombination for which a passivation effect by the antireflective coating partially recovers the V_OC. The V_OC penalty for small cells is also reduced under high-intensity illumination, from 3.8% under sun to 1.0% at 974 suns. High intensity illumination yields an efficiency of 33.8% under 584 suns for a 0.25-mm² and microcells are expected to show higher efficiency than standard cells under very high concentration.

中文翻译：

用于微聚光器光伏的 InGaP/InGaAs/Ge 太阳能电池的小型化

微型聚光光伏 (CPV) 将微型太阳能电池集成到聚光光伏模块中，有望成为一种廉价且高效的技术，可以减轻阻碍标准 CPV 的缺点，例如电阻功率损耗。在本文中，我们制造了专为微型 CPV 应用设计的微型多结太阳能电池。通用工艺流程，包括等离子蚀刻步骤，是为制造完整的 InGaP/InGaAs/Ge 微电池而开发的，该微电池具有低至 0.089 mm ² (0.068-mm ²台面)的矩形、圆形和六边形有源区域。大电池 (>1 mm ² ) 在一个太阳 AM1.5D 光照下表现出良好的电气性能，但开路电压 ( V _OC) 在最小的细胞上观察到。这种效应归因于周边复合，其中抗反射涂层的钝化效应部分恢复了V _OC。的V _OC惩罚小细胞还根据高强度照明下太阳在974个太阳降低，从3.8％至1.0％。对于 0.25 毫米^{2 而言}，高强度照明在 584 个太阳下产生 33.8% 的效率，并且预计微电池在非常高的浓度下会显示出比标准电池更高的效率。

更新日期：2021-05-06

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