Qalandarova, D.; Ibragimova, M.; Salayev, U.; Sapaev, I.; Mamarajabov, D.; Madolimov, A.; Tokhirova, F.; Yusupov, A.; Sattarova, O. Incomplete Dopant Ionization Effects in GaN Optical Photovoltaic Converters Over 4–400 K for Space Solar Energy Applications. East Eur. J. Phys. 2026, 232-238.