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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
Affiliation  

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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