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Pyrrole-an additives for improving efficiency and stability of the perovskite solar cells

Abstract

The quality of perovskite layer has an important influence on the photovoltaic performance and stability of perovskite solar cells. Appropriate additive can effectively improve the quality of perovskites. In this work, pyrrole is introduced into the cesium-containing triple cation perovskite precursor solution and this strategy is demonstrated to control the crystallinity of perovskite films. The pyrrole ring is hydrophobic, and the nitrogen atom (N) can combine with the lead-iodine (Pb-I) framework by coordinating with the Pb ions, or pyrrole hydrogen bonding with the organic cation. The XRD patterns and AFM images prove that the pyrrole significantly affects the crystallinity and roughness of perovskite films. The device based on pyrrole-modified exhibits a champion power conversion efficiency of 20.07%, while the pristine device gets an efficiency of 18.58% at the same conditions. This approach suggest an important direction for improving the film quality to reduce trap density and charge recombination.

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Publication details

The article was received on 18 Mar 2019, accepted on 12 Apr 2019 and first published on 16 Apr 2019


Article type: Paper
DOI: 10.1039/C9TA02916H
Citation: J. Mater. Chem. A, 2019, Accepted Manuscript

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    Pyrrole-an additives for improving efficiency and stability of the perovskite solar cells

    X. Liu, J. Wu, Q. guo, Y. Yang, H. Luo, Q. Liu, X. Wang, X. He, M. Huang and L. Zhang, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA02916H

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