Improved performance of D149 dye-sensitized ZnO-based solar cell under solvents activation effect Taif Saad Al Maadhede, Mohammad Hafizuddin Jumali, Hadi J. Al-Agealy, Chi Chin Yap and Y. Al-Douri Eur. Phys. J. Plus, 138 4 (2023) 325 Published online: 10 April 2023 DOI: 10.1140/epjp/s13360-023-03935-0