Yan Liu, Bin Ding, Yong Ding, Gao Zhang, Xin Zhang, Xintong Ma, Yao Wang, Lirong Zeng, Meijun Liu, Guanjun Yang*, Mohammad Khaja Nazeeruddin* and Bo Chen*,
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引用次数: 0
Abstract
Formamidinium lead iodide (FAPbI3) stands out as a promising composition for perovskite solar cells. However, achieving a pure α-FAPbI3 film typically requires a dry environment, which poses a challenge for its widespread commercial application. Our investigation reveals that an excessive presence of dimethyl sulfoxide (DMSO) in the intermediate film obstructs the formation of a pure α-FAPbI3 perovskite film under ambient air. This occurs because DMSO induces instability of intermediates, provokes an unfavorable α-to-δ phase transition, and leaves behind a residual δ-phase in the annealed FAPbI3 film. We discover that there exists a competition between DMSO and MACl regarding the stabilization of the α-phase perovskite structure. A DMSO extraction strategy is proposed to release the beneficial effect of MACl on α-phase stabilization, facilitating the deposition of void-free, pure α-FAPbI3 perovskite films with a low defect density in ambient air. Consequently, this breakthrough enables the fabrication of perovskite solar cells and modules exhibiting impressive efficiencies of 25.71% and 22.12%, respectively.
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.