2021. Corrigendum to "Simulation and Optimization of Lead-Based Perovskite Solar Cells with Cuprous Oxide as a P-type Inorganic Layer [J. Nig. Soc. Phys. Sci. 1 (2019) 72–81, https://doi.org/10.46481/jnsps.2019.13]". Journal of the Nigerian Society of Physical Sciences. 3, 3 (Aug. 2021), 190–190. DOI:https://doi.org/10.46481/jnsps.2021.332.