Ugwu, E.I. et al. 2025. Electrical and Solid State Properties of Aluminum Doped Nickel Sulphide Thin Film by Chemical Bath Method. Nigerian Journal of Physics. 34, 4 (Nov. 2025), 137–145. DOI:https://doi.org/10.62292/10.62292/njp.v34i4.2025.460.