Lead-Free Perovskite Tandem Solar Cells with Wide Bandgap Tin Perovskite and CIGS

IF 19.3 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-04-03 DOI:10.1021/acsenergylett.5c00163

Hua̅n Bì, Zheng Zhang, Takeshi Kitamura, Gaurav Kapil, Ajay Kumar Baranwal, Mengmeng Chen, Liang Wang, Jiaqi Liu, Qing Shen, Shuzi Hayase

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Abstract

Wide-bandgap (WBG) tin perovskite solar cells offer a promising solution for the development of multijunction and nontoxic photovoltaic devices. However, rapid crystallization of the perovskite film always results in numerous defects within it, creating nonradiative recombination sites that impair both the efficiency and the stability of the devices. In this work, a ferrocene-based additive, 1,1-bis(diphenylphosphino)ferrocene-palladium(II) dichloride dichloromethane complex (Pd(dppf)Cl₂), was introduced to enable the fabrication of high-quality perovskite films and high-efficiency perovskite devices. The functional groups in Pd(dppf)Cl₂ (e.g., benzene rings, Cl, etc.) interact with the perovskite to enhance the perovskite film quality. Additionally, the reducibility of ferrocene offers an effective approach to improve film properties, as ferrocene can efficiently reduce Sn⁴⁺ to Sn²⁺ in both the solution and the film. Finally, the single junction device with a Pd(dppf)Cl₂ additive achieved a power conversion efficiency (PCE) of 11.52% and demonstrated improved stability. Furthermore, a fully lead-free tandem device based on WBG Sn PSCs was fabricated, achieving a remarkable PCE of 14.51%.

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具有宽禁带锡钙钛矿和CIGS的无铅钙钛矿串联太阳能电池

宽带隙（WBG）锡包晶石太阳能电池为开发多接面无毒光伏设备提供了一种前景广阔的解决方案。然而，过氧化锡薄膜的快速结晶总是会在其内部产生大量缺陷，形成非辐射性重组点，从而影响设备的效率和稳定性。在这项研究中，我们引入了一种二茂铁基添加剂--1,1-双（二苯基膦）二茂铁-二氯化钯（II）二氯甲烷络合物（Pd(dppf)Cl2），以制造高质量的过氧化物薄膜和高效过氧化物器件。Pd(dppf)Cl2 中的官能团（如苯环、Cl 等）与包晶石相互作用，从而提高了包晶石薄膜的质量。此外，二茂铁的还原性为改善薄膜性能提供了一种有效的方法，因为二茂铁在溶液和薄膜中都能有效地将 Sn4+ 还原成 Sn2+。最后，使用 Pd(dppf)Cl2 添加剂的单结器件实现了 11.52% 的功率转换效率 (PCE)，并显示出更高的稳定性。此外，基于 WBG Sn PSCs 的全无铅串联器件也已制成，并实现了 14.51% 的显著 PCE。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Energy Letters Energy-Renewable Energy, Sustainability and the Environment

CiteScore

31.20

自引率

5.00%

发文量

469

审稿时长

1 months

期刊介绍： ACS Energy Letters is a monthly journal that publishes papers reporting new scientific advances in energy research. The journal focuses on topics that are of interest to scientists working in the fundamental and applied sciences. Rapid publication is a central criterion for acceptance, and the journal is known for its quick publication times, with an average of 4-6 weeks from submission to web publication in As Soon As Publishable format. ACS Energy Letters is ranked as the number one journal in the Web of Science Electrochemistry category. It also ranks within the top 10 journals for Physical Chemistry, Energy & Fuels, and Nanoscience & Nanotechnology. The journal offers several types of articles, including Letters, Energy Express, Perspectives, Reviews, Editorials, Viewpoints and Energy Focus. Additionally, authors have the option to submit videos that summarize or support the information presented in a Perspective or Review article, which can be highlighted on the journal's website. ACS Energy Letters is abstracted and indexed in Chemical Abstracts Service/SciFinder, EBSCO-summon, PubMed, Web of Science, Scopus and Portico.