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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:
# 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
Received 12 November 2022; Accepted 05 December 2022; Issue published 26 June 2023
Abstract
All-inorganic CsPbI
3 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 CsPbI
3 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 CsPbI
3 perovskite films to passivate defects, which improves the quality of
CsPbI
3 perovskite films as well as induces the generation of a quasi-2D Py
2CsPb
2I
7 capping layer between perovskite layer and hole transport layer. Such quasi-2D Py
2CsPb
2I
7 capping layer optimizes interface contact
between CsPbI
3 perovskite layer and hole transport layer and blocks the electron transfer from CsPbI
3 perovskite
photoactive layer to the hole transport layer. As a result, the performance of CsPbI
3 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 CsPbI
3 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%).
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Cite This Article
Zhang, Q., Guo, Y., Liu, H., Li, W., Zhu, L. et al. (2023). Treating CsPbI
3 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