Tailoring Crystallization Dynamics of CsPbI 3 for Scalable Production of Efficient Inorganic Perovskite Solar Cells

Sun, Nannan; Fu, Sheng; Li, You; Chen, Lei; Chung, Jaehoon; Saeed, Muhammad Mohsin; Dolia, Kshitiz; Rahimi, Amirhossein; Li, Chongwen; Song, Zhaoning; Yan, Yanfa

doi:10.1002/adfm.202309894

Title: Tailoring Crystallization Dynamics of CsPbI ₃ for Scalable Production of Efficient Inorganic Perovskite Solar Cells

Journal Article · 26 October 2023 · Advanced Functional Materials

DOI: https://doi.org/10.1002/adfm.202309894 · OSTI ID:2203977

Sun, Nannan ^[1]; Fu, Sheng ^[1]; Li, You ^[1]; Chen, Lei ^[1]; Chung, Jaehoon ^[1]; Saeed, Muhammad Mohsin ^[1]; Dolia, Kshitiz ^[1]; Rahimi, Amirhossein ^[1]; Li, Chongwen ^[1];

^[1]; Yan, Yanfa ^[1]

Department of Physics and Astronomy and Wright Center for Photovoltaics Innovation and Commercialization University of Toledo Toledo OH 43606 USA

Abstract All‐inorganic perovskite cesium lead triiodide (CsPbI ₃ ) with inorganic nature, low‐temperature synthesis, and a suitable bandgap is desirable for high‐performance photovoltaics. However, the scalable production of CsPbI ₃ photovoltaics is still challenging due to a large nucleation energy barrier and slow phase transition during unassisted natural crystallization. Here, the crystallization dynamics of CsPbI ₃ thin films is tailored via lead acetate (PbAc ₂ ) substitution in the perovskite precursor ink, allowing the scalable fabrication of efficient all‐inorganic perovskite solar cells and minimodules. Introducing PbAc ₂ enlarges CsPbI ₃ colloid size in the precursor and reduces the nucleation energy barrier. Additionally, reactions between acetate and dimethylammonium in the wet film accelerate the removal of dimethylammonium additives and generate solvent vapors for self‐regulate internal solvent annealing, resulting in densely packed, uniform, and pinhole‐free CsPbI ₃ perovskite films over large areas. This strategy demonstrates inverted CsPbI ₃ solar cells with 20.17% efficiency and good operational stability (retaining 95.5% of initial efficiency after continuous operation for 1800 h) and 15.1%‐efficient CsPbI ₃ minimodules with an active area of 26.8 cm ² .

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Sponsoring Organization:: USDOE

Grant/Contract Number:: NONE; EE0008970; EE0008837

OSTI ID:: 2203977

Alternate ID(s):: OSTI ID: 2290417

Journal Information:: Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 6 Vol. 34; ISSN 1616-301X

Publisher:: Wiley Blackwell (John Wiley & Sons)Copyright Statement

Country of Publication:: Germany

Language:: English

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