钙钛矿/硅串联太阳能电池硅金字塔织构的纳米级尺寸控制，实现基于溶液的钙钛矿顶部电池制造并改善硅底部电池响应,Advanced Materials Interfaces

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钙钛矿/硅串联太阳能电池硅金字塔织构的纳米级尺寸控制，实现基于溶液的钙钛矿顶部电池制造并改善硅底部电池响应
Advanced Materials Interfaces ( IF 4.3 ) Pub Date : 2023-09-19 , DOI: 10.1002/admi.202300504
Yuqing Li _{1,

2} , Hitoshi Sai ₁ , Calum McDonald ₁ , Zhihao Xu ₁ , Yasuyoshi Kurokawa ₂ , Noritaka Usami ₂ , Takuya Matsui _{1,

2}

Affiliation

采用单片钙钛矿/硅串联太阳能电池架构来超越单结效率极限。最近，从工业角度来看，越来越需要硅底部电池中的双面织构与溶液处理的钙钛矿顶部电池兼容。在此，采用银辅助碱性蚀刻方法来制造纳米级硅金字塔纹理，并研究了不同金字塔尺寸（400-900 nm）对界面形态和钙钛矿/硅串联电池性能的影响。结果表明，当纹理尺寸超过钙钛矿厚度（~500nm）时，由于粗糙硅表面上不均匀的顶部电池形成，电分流开始增加，并且开路电压（VOC _）降低。然而，当纹理尺寸减小到 400–500 nm 时，所有旋涂钙钛矿顶部电池组件层在纳米金字塔 Si 上呈现出均匀的形状，导致高VOC和增强的 Si 底部电池电流（约 1.0 mA _） cm ^-2），这是由于在不使用光耦合器的情况下顶部/底部电池界面处的反射率受到抑制。与常用的单面织构硅相比，双面纳米金字塔硅织构提供了提高串联电池效率的机会，同时降低了生产成本。

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Nanoscale Size Control of Si Pyramid Texture for Perovskite/Si Tandem Solar Cells Enabling Solution-Based Perovskite Top-Cell Fabrication and Improved Si Bottom-Cell Response

A monolithic perovskite/silicon tandem solar cell architecture is employed to surpass the single-junction efficiency limit. Recently, there is an increasing need for the double-sided textures in the Si bottom cell to be compatible with the solution-processed perovskite top cell from an industrial perspective. Herein, a silver-assisted alkaline etching method is applied to fabricate nanoscale Si pyramid textures, and the influence of varying pyramid size (400–900 nm) on the interface morphology and the performance of perovskite/Si tandem cells is investigated. It is demonstrated that electrical shunting starts to increase, and the open-circuit voltage (V_OC) decreases when the texture size exceeds the perovskite thickness (~500nm) due to the non-uniform top-cell formation on a rough Si surface. However, when the texture size is reduced to 400–500 nm, all spin-coated perovskite top-cell component layers exhibit an even form over the nanopyramid Si, resulting in a high V_OC and an enhanced Si bottom cell current (≈1.0 mA cm⁻²) due to the suppressed reflectance at the top/bottom cell interface without using optical couplers. The double-sided nanopyramid Si texture offers opportunities to increase tandem cell efficiency while reducing its production cost compared with the commonly used single-sided textured Si.

更新日期：2023-09-19

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