高效反式无机钙钛矿太阳电池的空气制备

Efficient inverted inorganic perovskite solar cells fabricated in common air

  • 摘要: 无机钙钛矿太阳电池是钙钛矿/晶硅叠层太阳电池顶部电池潜在候选者之一。然而,目前相关叠层装置的报道极为稀少,这主要是由于无机钙钛矿薄膜表面和内部存在严重的非辐射复合,限制了对应装置功率转换效率(power conversion efficiency,PCE)的提升。本文在无机钙钛矿前驱液内部引入2-氨基-5-溴苯甲酰胺(2-amino-5-bromobenzamide,ABB)对无机钙钛矿薄膜的结晶过程进行调控。经过该策略调控后,无机钙钛矿薄膜表面的针孔数目减少,缺陷态密度降低,非辐射复合受到抑制。基于空气制备的反式无机钙钛矿太阳电池实现了19.24%的PCE且稳定性提升明显。

     

    Abstract: Inorganic perovskite solar cells are considered promising candidates for the top cell in perovskite/silicon tandem solar cells. However, there is currently a limited number of related reports, primarily due to the significant non-radiative recombination occurring at both the surface and within inorganic perovskite films, which constrains the enhancement of power conversion efficiency (PCE) in these devices. In this study, 2-amino-5-bromobenzamide (ABB) was incorporated into the precursor solution of inorganic perovskite to modulate the crystallization process of the resulting film. Following this approach, we observed a reduction in pinhole density on the surface of the inorganic perovskite film, a decrease in defect state density, and suppression of non-radiative recombination. The air-prepared inverted inorganic perovskite solar cells achieved a PCE of 19.24% and demonstrated notable improvements in stability.

     

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