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Improved Carrier Management via a Multifunctional Modifier for High-Quality Low-Bandgap Sn–Pb Perovskites and Efficient All-Perovskite Tandem Solar Cells
Advanced Materials ( IF 27.4 ) Pub Date : 2023-03-12 , DOI: 10.1002/adma.202300352 Jincheng Luo 1 , Rui He 1 , Huagui Lai 2 , Cong Chen 1 , Jingwei Zhu 1 , Yuliang Xu 1 , Fang Yao 3 , Tianshu Ma 4 , Yi Luo 1 , Zongjin Yi 1 , Yiting Jiang 1 , Zhiyu Gao 1 , Juncheng Wang 1 , Wenwu Wang 1 , Hao Huang 5 , Ye Wang 6 , Shengqiang Ren 1 , Qianqian Lin 3 , Changlei Wang 4 , Fan Fu 2 , Dewei Zhao 1
Advanced Materials ( IF 27.4 ) Pub Date : 2023-03-12 , DOI: 10.1002/adma.202300352 Jincheng Luo 1 , Rui He 1 , Huagui Lai 2 , Cong Chen 1 , Jingwei Zhu 1 , Yuliang Xu 1 , Fang Yao 3 , Tianshu Ma 4 , Yi Luo 1 , Zongjin Yi 1 , Yiting Jiang 1 , Zhiyu Gao 1 , Juncheng Wang 1 , Wenwu Wang 1 , Hao Huang 5 , Ye Wang 6 , Shengqiang Ren 1 , Qianqian Lin 3 , Changlei Wang 4 , Fan Fu 2 , Dewei Zhao 1
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All-perovskite tandem solar cells (TSCs) hold great promise in terms of ultrahigh efficiency, low manufacturing cost, and flexibility, stepping forward to the next-generation photovoltaics. However, their further development is hampered by the relatively low performance of low-bandgap (LBG) tin (Sn)–lead (Pb) perovskite solar cells (PSCs). Improving the carrier management, including suppressing trap-assisted non-radiative recombination and promoting carrier transfer, is of great significance to enhance the performance of Sn–Pb PSCs. Herein, a carrier management strategy is reported for using cysteine hydrochloride (CysHCl) simultaneously as a bulky passivator and a surface anchoring agent for Sn–Pb perovskite. CysHCl processing effectively reduces trap density and suppresses non-radiative recombination, enabling the growth of high-quality Sn–Pb perovskite with greatly improved carrier diffusion length of >8 µm. Furthermore, the electron transfer at the perovskite/C60 interface is accelerated due to the formation of surface dipoles and favorable energy band bending. As a result, these advances enable the demonstration of champion efficiency of 22.15% for CysHCl-processed LBG Sn–Pb PSCs with remarkable enhancement in both open-circuit voltage and fill factor. When paired with a wide-bandgap (WBG) perovskite subcell, a certified 25.7%-efficient all-perovskite monolithic tandem device is further demonstrated.
中文翻译：
通过用于高质量低带隙 Sn-Pb 钙钛矿和高效全钙钛矿串联太阳能电池的多功能改性剂改善载流子管理
全钙钛矿叠层太阳能电池 (TSC) 在超高效率、低制造成本和灵活性方面具有广阔前景，有望迈向下一代光伏发电。然而，它们的进一步发展受到低带隙 (LBG) 锡 (Sn)-铅 (Pb) 钙钛矿太阳能电池 (PSC) 相对较低性能的阻碍。改善载流子管理，包括抑制陷阱辅助非辐射复合和促进载流子转移，对提高Sn-Pb PSCs的性能具有重要意义。在此，报道了一种载体管理策略，即使用半胱氨酸盐酸盐 (CysHCl) 同时作为大体积钝化剂和 Sn-Pb 钙钛矿的表面锚定剂。CysHCl处理有效降低陷阱密度并抑制非辐射复合，能够生长高质量的 Sn-Pb 钙钛矿，载流子扩散长度大大提高 >8 µm。此外，钙钛矿/C 处的电子转移60界面由于表面偶极子的形成和有利的能带弯曲而加速。因此，这些进步使 CysHCl 处理的 LBG Sn-Pb PSC 的效率达到 22.15%，并显着提高开路电压和填充因子。当与宽带隙 (WBG) 钙钛矿子电池配对时，进一步展示了经过认证的 25.7% 效率的全钙钛矿单片串联器件。
更新日期：2023-03-12
中文翻译：
通过用于高质量低带隙 Sn-Pb 钙钛矿和高效全钙钛矿串联太阳能电池的多功能改性剂改善载流子管理
全钙钛矿叠层太阳能电池 (TSC) 在超高效率、低制造成本和灵活性方面具有广阔前景，有望迈向下一代光伏发电。然而，它们的进一步发展受到低带隙 (LBG) 锡 (Sn)-铅 (Pb) 钙钛矿太阳能电池 (PSC) 相对较低性能的阻碍。改善载流子管理，包括抑制陷阱辅助非辐射复合和促进载流子转移，对提高Sn-Pb PSCs的性能具有重要意义。在此，报道了一种载体管理策略，即使用半胱氨酸盐酸盐 (CysHCl) 同时作为大体积钝化剂和 Sn-Pb 钙钛矿的表面锚定剂。CysHCl处理有效降低陷阱密度并抑制非辐射复合，能够生长高质量的 Sn-Pb 钙钛矿，载流子扩散长度大大提高 >8 µm。此外，钙钛矿/C 处的电子转移60界面由于表面偶极子的形成和有利的能带弯曲而加速。因此，这些进步使 CysHCl 处理的 LBG Sn-Pb PSC 的效率达到 22.15%，并显着提高开路电压和填充因子。当与宽带隙 (WBG) 钙钛矿子电池配对时，进一步展示了经过认证的 25.7% 效率的全钙钛矿单片串联器件。
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