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2D/3D heterostructured CsPbI2Br solar cells: a choice for a monolithic all-perovskite tandem device
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-06-15 , DOI: 10.1039/d2ta03627d Liqiu Yan 1 , Yan Li 1 , Siqi Li 1 , Xiangnan Sun 1 , Yao Li 1 , Xue Han 2 , Meilan Huang 3 , Xia Tao 1
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2022-06-15 , DOI: 10.1039/d2ta03627d Liqiu Yan 1 , Yan Li 1 , Siqi Li 1 , Xiangnan Sun 1 , Yao Li 1 , Xue Han 2 , Meilan Huang 3 , Xia Tao 1
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All-inorganic CsPbI2Br perovskite solar cells (PSCs) have attracted intensive attention owing to their suitable bandgaps and excellent photo- and thermal stability, making them promising ideal top cells in high-performance monolithic all-perovskite tandem solar cells (all-PTSCs). However, CsPbI2Br PSCs are still facing a challenge due to their relatively low power conversion efficiency (PCE) and moisture sensitivity. Herein, a simple and effective in situ growth method was adopted to construct a two-dimensional/three-dimensional (2D/3D) heterostructure by spinning n-butylammonium bromide (BABr) on the top of a 3D CsPbI2Br perovskite film. The such fabricated high-quality 2D/3D CsPbI2Br film exhibits excellent hydrophobicity against moisture invasion, and a well-matched energy level with the hole transport layer (HTL) facilitating hole extraction at the perovskite/HTL interface. As a result, the optimized 2D/3D CsPbI2Br solar cell achieves an excellent PCE of 16.57% with improved stability. Based on this, we developed an all-PTSC having 2D/3D CsPbI2Br and MAPbI3 as the optical absorption layer of top and bottom cells, respectively, along with a solution-processed PEDOT:PSS film with high conductivity and high transmittance as the recombination layer. The fabricated all-PTSC exhibits a PCE of 10.22% and an ultrahigh open-circuit voltage of 2.33 V, approaching the sum of the light voltages of the two sub-cells. Benefiting from the outstanding thermal stability and hydrophobicity of 2D/3D CsPbI2Br, the all-PTSC showed superior stability under heat and air. This work demonstrates that all-inorganic perovskites as the photo-response cores of top cells are appropriate candidates for the fabrication of efficient and stable monolithic all-PTSCs.
中文翻译：
2D/3D异质结构CsPbI2Br太阳能电池：单片全钙钛矿串联器件的选择
全无机CsPbI 2 Br钙钛矿太阳能电池（PSCs）因其合适的带隙和优异的光热稳定性而备受关注，使其有望成为高性能单片全钙钛矿串联太阳能电池（all-PTSCs）的理想顶层电池。 ）。然而，CsPbI 2 Br PSCs由于其相对较低的功率转换效率（PCE）和湿度敏感性仍然面临挑战。在此，采用一种简单有效的原位生长方法，通过在 3D CsPbI 2 Br 钙钛矿薄膜顶部旋转正丁基溴化铵 (BABr)来构建二维/三维 (2D/3D) 异质结构。这种制造的高质量 2D/3D CsPbI 2Br 薄膜表现出优异的疏水性，可防止水分侵入，并且与空穴传输层 (HTL) 具有良好匹配的能级，有助于在钙钛矿/HTL 界面处进行空穴提取。因此，优化后的 2D/3D CsPbI 2 Br 太阳能电池实现了 16.57% 的优异 PCE，并提高了稳定性。基于此，我们开发了具有 2D/3D CsPbI 2 Br 和 MAPbI 3的全 PTSC分别作为顶部和底部电池的光吸收层，以及溶液处理的具有高导电性和高透射率的PEDOT：PSS薄膜作为复合层。制造的全 PTSC 表现出 10.22% 的 PCE 和 2.33 V 的超高开路电压，接近两个子电池的光电压之和。得益于 2D/3D CsPbI 2 Br 出色的热稳定性和疏水性，全 PTSC 在热和空气下表现出优异的稳定性。这项工作表明，全无机钙钛矿作为顶部电池的光响应核心是制造高效且稳定的单片全 PTSC 的合适候选者。
更新日期：2022-06-15
中文翻译：
2D/3D异质结构CsPbI2Br太阳能电池：单片全钙钛矿串联器件的选择
全无机CsPbI 2 Br钙钛矿太阳能电池（PSCs）因其合适的带隙和优异的光热稳定性而备受关注，使其有望成为高性能单片全钙钛矿串联太阳能电池（all-PTSCs）的理想顶层电池。 ）。然而，CsPbI 2 Br PSCs由于其相对较低的功率转换效率（PCE）和湿度敏感性仍然面临挑战。在此，采用一种简单有效的原位生长方法，通过在 3D CsPbI 2 Br 钙钛矿薄膜顶部旋转正丁基溴化铵 (BABr)来构建二维/三维 (2D/3D) 异质结构。这种制造的高质量 2D/3D CsPbI 2Br 薄膜表现出优异的疏水性，可防止水分侵入，并且与空穴传输层 (HTL) 具有良好匹配的能级，有助于在钙钛矿/HTL 界面处进行空穴提取。因此，优化后的 2D/3D CsPbI 2 Br 太阳能电池实现了 16.57% 的优异 PCE，并提高了稳定性。基于此，我们开发了具有 2D/3D CsPbI 2 Br 和 MAPbI 3的全 PTSC分别作为顶部和底部电池的光吸收层，以及溶液处理的具有高导电性和高透射率的PEDOT：PSS薄膜作为复合层。制造的全 PTSC 表现出 10.22% 的 PCE 和 2.33 V 的超高开路电压，接近两个子电池的光电压之和。得益于 2D/3D CsPbI 2 Br 出色的热稳定性和疏水性，全 PTSC 在热和空气下表现出优异的稳定性。这项工作表明，全无机钙钛矿作为顶部电池的光响应核心是制造高效且稳定的单片全 PTSC 的合适候选者。
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