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Multifunctional Additive CdAc2 for Efficient Perovskite-Based Solar Cells
Advanced Materials ( IF 27.4 ) Pub Date : 2023-05-25 , DOI: 10.1002/adma.202211806
Ningyu Ren 1, 2, 3, 4, 5, 6, 7 , Pengyang Wang 1, 2, 3, 4, 5 , Junke Jiang 8, 9 , Renjie Li 1, 2, 3, 4, 5 , Wei Han 1, 2, 3, 4, 5 , Jingjing Liu 1, 2, 3, 4, 5 , Zhao Zhu 1, 2, 3, 4, 5 , Bingbing Chen 1, 2, 3, 4, 5 , Qiaojing Xu 1, 2, 3, 4, 5 , Tiantian Li 6, 7 , Biao Shi 1, 2, 3, 4, 5 , Qian Huang 1, 2, 3, 4, 5 , Dekun Zhang 1, 2, 3, 4, 5 , Sofia Apergi 8, 9 , Geert Brocks 8, 9, 10 , Chenjun Zhu 6, 7 , Shuxia Tao 8, 9 , Ying Zhao 1, 2, 3, 4, 5 , Xiaodan Zhang 1, 2, 3, 4, 5
Affiliation  

Polycrystalline perovskite films fabricated on flexible and textured substrates often are highly defective, leading to poor performance of perovskite devices. Finding substrate-tolerant perovskite fabrication strategies is therefore paramount. Herein, this study shows that adding a small amount of Cadmium Acetate (CdAc2) in the PbI2 precursor solution results in nano-hole array films and improves the diffusion of organic salts in PbI2 and promotes favorable crystal orientation and suppresses non-radiative recombination. Polycrystalline perovskite films on the flexible substrate with ultra-long carrier lifetimes exceeding 6 µs are achieved. Eventually, a power conversion efficiency (PCE) of 22.78% is obtained for single-junction flexible perovskite solar cells (FPSCs). Furthermore, it is found that the strategy is also applicable for textured tandem solar cells. A champion PCE of 29.25% (0.5003 cm2) is demonstrated for perovskite/silicon tandem solar cells (TSCs) with CdAc2. Moreover, the un-encapsulated TSCs maintains 109.78% of its initial efficiency after 300 h operational at 45 °C in a nitrogen atmosphere. This study provides a facile strategy for achieving high-efficiency perovskite-based solar cells.

中文翻译:

用于高效钙钛矿太阳能电池的多功能添加剂 CdAc2

在柔性和有纹理的基底上制造的多晶钙钛矿薄膜通常有很高的缺陷,导致钙钛矿器件的性能较差。因此,寻找耐基板的钙钛矿制造策略至关重要。在此,本研究表明,在PbI 2前驱体溶液中添加少量醋酸镉(CdAc 2 )会产生纳米孔阵列薄膜,并改善有机盐在PbI 2中的扩散,促进有利的晶体取向并抑制非辐射重组。在柔性基板上实现了超长载流子寿命超过 6 µs 的多晶钙钛矿薄膜。最终,单结柔性钙钛矿太阳能电池(FPSC)的功率转换效率(PCE)达到22.78%。此外,发现该策略也适用于纹理化串联太阳能电池。使用 CdAc 2的钙钛矿/硅串联太阳能电池 (TSC)的冠军 PCE 为 29.25% (0.5003 cm 2 ) 。此外,未封装的 TSC 在 45°C 氮气气氛下运行 300 小时后仍保持其初始效率的 109.78%。这项研究为实现高效钙钛矿太阳能电池提供了一种简便的策略。
更新日期:2023-05-25
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