OKOYE, Ikechukwu Francis; GAFAR, Maryam Kemi; NWOKOYE, Anthony Osita Chibuike; ALAEKWE, Ikenna Obiora. Hall Effect Measurement and Current–Voltage Features of Roselle Plant (Hibiscus Sabigriffa) Dye-Doped Nano Crystalline-TiO2 and the Effect of Sensitization on Dye Sensitized Solar Cell. Nigerian Journal of Physics, [S. l.], v. 35, n. 3, p. 29–36, 2026. DOI: 10.62292/njp.v35i3.2026.612. Disponível em: https://njp.nipngr.org/index.php/njp/article/view/612. Acesso em: 13 jun. 2026.