Modulation of Electron Transport Layers To Minimize Voltage Loss in CsSnI3 Perovskite Solar Cells

IF 18.2 1区材料科学 Q1 CHEMISTRY, PHYSICAL

ACS Energy Letters Pub Date : 2025-05-21 DOI:10.1021/acsenergylett.5c0112810.1021/acsenergylett.5c01128

Haixuan Yu, Lijuan Fu, Tianyu Sun, Deyu Wang, Zhirong Liu, Junyi Huang, Zhiguo Zhang, Xiaoting Ma, Xiongjie Li, Bing Hu, Muqing Chen, Shangfeng Yang*, Yan Shen* and Mingkui Wang*,

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Abstract

The efficiency of tin-based perovskite solar cells, particularly the inorganic CsSnI₃, remains far below that of lead-based counterparts due to the substantial voltage loss at the charge transport layer-perovskite interface. Systematic research shows that the voltage loss in the CsSnI₃ perovskite planar solar cells is mainly due to the reduction in the splitting of the quasi-Fermi energy level and the increase in the energy band bending at the electron transport layer (ETL)-perovskite interface. In this study, we propose the fullerene derivative tetramethylcyclobutadiene-C₆₀ (TMCB), which has the high lowest unoccupied molecular orbital energy level, as an ETL for CsSnI₃ perovskite planar solar cells to minimize voltage losses. The TMCB ETL has been demonstrated to facilitate CsSnI₃-based perovskite solar cells to achieve a remarkable power conversion efficiency of 14.95% with a high open circuit voltage of 0.81 V measured under AM 1.5G irradiation.

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电子传输层的调制以减少CsSnI3钙钛矿太阳能电池的电压损失

锡基钙钛矿太阳能电池的效率，特别是无机CsSnI3，由于电荷传输层-钙钛矿界面的大量电压损失，仍然远远低于铅基太阳能电池。系统研究表明，CsSnI3钙钛矿平面太阳能电池中的电压损失主要是由于准费米能级分裂的减少和电子传输层(ETL)-钙钛矿界面处能带弯曲的增加。在这项研究中，我们提出了富勒烯衍生物四甲基环丁二烯- c60 (TMCB)，它具有较高的最低未占据分子轨道能级，作为CsSnI3钙钛矿平面太阳能电池的ETL，以减少电压损失。TMCB ETL已被证明可以促进cssni3基钙钛矿太阳能电池在AM 1.5G辐照下达到14.95%的高开路电压0.81 V的功率转换效率。

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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.