DataVXACS Energy LettersPaper
journal article·2022-09-09

Phase-Pure γ-CsPbI3for Efficient Inorganic Perovskite Solar Cells

Linrui Duan, Hong Zhang, Mengqi Liu, Michael Grätzel, Jingshan Luo

ACS Energy Letters· Volume 7· Issue 9
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Source abstract

Abstract

Cesium lead triiodide (CsPbI3) has attracted enormous attention due to its outstanding thermal stability and ideal bandgap (∼1.75 eV) for tandem applications. However, it is still challenging to prepare high-efficiency fully inorganic CsPbI3 perovskite solar cells. In this work, we developed a formamidine acetate (FAAc)-assisted strategy to prepare phase-pure high-quality γ-CsPbI3 perovskite film on a planar substrate. Mechanistic studies reveal that the incorporation of FAAc into perovskite precursor solution alters the phase transition process with an additional intermediate phase formation, which leads to an improved crystallinity of γ-CsPbI3 film and better interfacial contact. As a result, the FAAc-assisted γ-CsPbI3 solar cells exhibit a power conversion efficiency (PCE) of over 18% and retain 95% of the initial efficiency after 30 days of aging.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute of Photoelectronic Thin Film Devices and Technology, Solar Energy Research Center, Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin, Ministry of Education Engineering Research Center of Thin Film Photoelectronic Technology, Renewable Energy Conversion and Storage Center, Nankai University, Tianjin 300350, China

Laboratory of Photonics and Interfaces, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne 1015, Switzerland

Institute of Optoelectronics, Fudan University, Shanghai 200433, China

Haihe Laboratory of Sustainable Chemical Transformations, Tianjin 300192, China

Funding

Ministry of Science and Technology of the People's Republic of China · Horizon 2020 Framework Programme · China Scholarship Council · Higher Education Discipline Innovation Project · Tianjin Distinguished Young Scholar Fund · Haihe Laboratory of Sustainable Chemical Transformations

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