**A New Guide to Thermally Optimized Doped Oxides Monolayer Spray-Grown Solar Cells: The Amlouk-Boubaker Optothermal Expansivity AB**

M. Benhaliliba1, C.E. Benouis1,

K. Boubaker2, M. Amlouk2 and A. Amlouk2

*1Physics Department, Sciences Faculty, Oran University of Sciences and Technology Mohamed Boudiaf- USTOMB, POBOX 1505 Mnaouer- Oran, 2Unité de Physique des dispositifs à Semi-conducteurs UPDS, Faculté des Sciences de Tunis, Campus Universitaire 2092 Tunis, 1Algeria 2Tunisia* 
