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Treating CsPbI3 Perovskite with Pyrrolidinium Iodide to Improve the Performance of Perovskite Solar Cells

Qixian Zhang#, Yi Guo#, Huicong Liu, Weiping Li, Liqun Zhu, Haining Chen*

School of Materials Science and Engineering, Beihang University, Beijing, 100191, China

* Corresponding Author: Haining Chen. Email: email
# These authors contributed equally

(This article belongs to the Special Issue: Perovskite Solar Cells)

Journal of Renewable Materials 2023, 11(8), 3193-3201. https://doi.org/10.32604/jrm.2023.027730

Abstract

All-inorganic CsPbI3 perovskite has attracted wide attention due to its desirable optical bandgap (Eg: ∼1.7 eV) as well as high chemical stability. Nevertheless, the photovoltaic performance of CsPbI3 perovskite solar cells (PSCs) was limited by severe nonradiative charge recombination due to high defect density at the grain boundary and surface of perovskite films. To address this issue, a pyrrolidinium iodide (PyI) molecule was introduced to modify the surface and grain boundary of CsPbI3 perovskite films to passivate defects, which improves the quality of CsPbI3 perovskite films as well as induces the generation of a quasi-2D Py2CsPb2I7 capping layer between perovskite layer and hole transport layer. Such quasi-2D Py2CsPb2I7 capping layer optimizes interface contact between CsPbI3 perovskite layer and hole transport layer and blocks the electron transfer from CsPbI3 perovskite photoactive layer to the hole transport layer. As a result, the performance of CsPbI3 PSCs is well improved to 17.87% for power conversion efficiency (PCE) with an ultra-high fill factor (FF) of 0.84. In addition, the PyI molecule modified CsPbI3 perovskite devices exhibit excellent stability, which remains its initial PCE almost unchanged after aging for 35 days under the dry air atmosphere (temperature: 20°C–30°C, control relative humidity (RH): <10%).

Graphic Abstract

Treating CsPbI<sub>3</sub> Perovskite with Pyrrolidinium Iodide to Improve the Performance of Perovskite Solar Cells

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Cite This Article

APA Style
Zhang, Q., Guo, Y., Liu, H., Li, W., Zhu, L. et al. (2023). Treating cspbi3 perovskite with pyrrolidinium iodide to improve the performance of perovskite solar cells. Journal of Renewable Materials, 11(8), 3193-3201. https://doi.org/10.32604/jrm.2023.027730
Vancouver Style
Zhang Q, Guo Y, Liu H, Li W, Zhu L, Chen H. Treating cspbi3 perovskite with pyrrolidinium iodide to improve the performance of perovskite solar cells. J Renew Mater. 2023;11(8):3193-3201 https://doi.org/10.32604/jrm.2023.027730
IEEE Style
Q. Zhang, Y. Guo, H. Liu, W. Li, L. Zhu, and H. Chen, “Treating CsPbI3 Perovskite with Pyrrolidinium Iodide to Improve the Performance of Perovskite Solar Cells,” J. Renew. Mater., vol. 11, no. 8, pp. 3193-3201, 2023. https://doi.org/10.32604/jrm.2023.027730



cc Copyright © 2023 The Author(s). Published by Tech Science Press.
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