Effect of aging under ambient conditions on the optical properties of Al-doped ZnO thin films deposited by direct current sputteringA. Barhoumi, G. Leroy, B. Duponchel, J. Gest and S. GuermaziEur. Phys. J. Plus, 132 1 (2017) 5DOI: https://doi.org/10.1140/epjp/i2017-11285-3