Pyridinium iodide (PyI; CAS Number: 18820-83-2) is an organic halide salt used as precursor in the preparation of perovskite-based opto-electronic systems. Pyridinium iodide was used in cation–anion-mixed perovskite for surface defect passivation resulting in highly efficient planar perovskite solar cells (Du et al., 2021).
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Du, Y., Wu, J., Zhang, X., Zhu, Q., Zhang, M., Liu, X., Zou, Y., Wang, S., Sun, W., 2021. Surface passivation using pyridinium iodide for highly efficient planar perovskite solar cells. Journal of Energy Chemistry 52, 84–91.