“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]’” (2021) Journal of the Nigerian Society of Physical Sciences, 3(3), pp. 190–190. doi:10.46481/jnsps.2021.332.