Interdigitated back‐contacted structure: A different approach towards high‐efficiency ultrathin copper indium gallium (di)selenide solar cells,Progress in Photovoltaics

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Interdigitated back‐contacted structure: A different approach towards high‐efficiency ultrathin copper indium gallium (di)selenide solar cells
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2020-06-11 , DOI: 10.1002/pip.3296
Nasim Rezaei ₁ , Paul Procel ₁ , Marcel Simor ₂ , Zeger Vroon ₃ , Miro Zeman ₁ , Olindo Isabella ₁

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An interdigitated back‐contacted (IBC) configuration is proposed for submicron copper indium gallium (di)selenide (CIGS). In a modelling platform, the structure was opto‐electrically optimized for maximum efficiency. The results are compared with a reference front/back‐contacted (FBC) solar cell with similar absorber thickness and exhibiting 11.9% efficiency. The electrical passivation at the front side is accomplished by an Al₂O₃ layer, which is endowed with negative fixed charges. The results indicate that with an optimal geometry and engineered bandgap grading, the efficiency of the new IBC structure can reach 17%. Additionally, with a reasonably low defect density in the absorber layer, efficiencies as high as 19.7% and open‐circuit voltage comparable with that of the record solar cell are possible with the IBC structure.

中文翻译：

叉指背接触式结构：高效超薄铜铟镓硒二硒化太阳能电池的另一种方法

提出了一种用于亚微米铜铟镓硒（CIGS）的叉指背接触（IBC）配置。在建模平台中，对结构进行了光电优化，以实现最大效率。将结果与具有相似吸收层厚度并显示11.9％效率的参考正面/背面（FBC）太阳能电池进行了比较。前侧的电钝化是通过Al ₂ O ₃来完成的层，具有负固定电荷。结果表明，通过最佳的几何形状和设计的带隙梯度，新型IBC结构的效率可以达到17％。此外，在吸收层中缺陷密度相当低的情况下，IBC结构可以实现与记录太阳能电池相当的效率高达19.7％的效率和开路电压。

更新日期：2020-06-11

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