Correlation of Band Bending and Ionic Losses in 1.68 eV Wide Band Gap Perovskite Solar Cells

IF 24.4 1区材料科学 Q1 CHEMISTRY, PHYSICAL Advanced Energy Materials Pub Date : 2024-12-17 DOI:10.1002/aenm.202404726

Florian Scheler, Silvia Mariotti, Daniele Mantione, Sahil Shah, Dorothee Menzel, Hans Köbler, Maxim Simmonds, Thomas W. Gries, Jona Kurpiers, Viktor Škorjanc, Jinzhao Li, Amran Al-Ashouri, Philipp Wagner, Steven P. Harvey, Fengjiu Yang, Marin Rusu, Thomas Unold, Bernd Stannowski, Kai Zhu, Felix Lang, Dieter Neher, Eva Unger, Antonio Abate, David Mecerreyes, Martin Stolterfoht, Eike Köhnen, Lars Korte, Marko Topič, Steve Albrecht

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Abstract

Perovskite solar cells (PSCs) are promising for high-efficiency tandem applications, but their long-term stability, particularly due to ion migration, remains a challenge. Despite progress in stabilizing PSCs, they still fall short compared to mature technologies like silicon. This study explores how different piperazinium salt treatments using iodide, chloride, tosylate, and bistriflimide anions affect the energetics, carrier dynamics, and stability of 1.68 eV bandgap PSCs. Chloride-based treatments achieved the highest power conversion efficiency (21.5%) and open-circuit voltage (1.28 V), correlating with stronger band bending and n-type character at the surface. At the same time, they showed reduced long-term stability due to increased ionic losses. Tosylate-treated devices offered the best balance, retaining 96.4% efficiency after 1000 h (ISOS-LC-1I). These findings suggest that targeted surface treatments can enhance both efficiency and stability in PSCs.

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过氧化物太阳能电池（PSCs）在高效串联应用中大有可为，但其长期稳定性，尤其是离子迁移造成的稳定性，仍然是一个挑战。尽管在稳定 PSC 方面取得了进展，但与硅等成熟技术相比，它们仍然存在不足。本研究探讨了使用碘化物、氯化物、甲苯磺酸盐和双三氟利昂阴离子进行的不同哌嗪盐处理如何影响 1.68 eV 带隙 PSC 的能量、载流子动力学和稳定性。基于氯化物的处理方法实现了最高的功率转换效率（21.5%）和开路电压（1.28 V），这与表面更强的带弯曲和 n 型特性有关。与此同时，由于离子损耗增加，它们的长期稳定性也有所下降。经过对甲苯磺酸盐处理的器件平衡性最好，1000 小时后仍能保持 96.4% 的效率（ISOS-LC-1I）。这些研究结果表明，有针对性的表面处理可以提高 PSC 的效率和稳定性。

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来源期刊

Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS

CiteScore

41.90

自引率

4.00%

发文量

889

审稿时长

1.4 months

期刊介绍： Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.