Organic solar cell Alkali Alkali fluoride postdeposition treatments PVD Buffer layers Interfaces Bond valence excess Addou M Organic photovoltaic cells 31P NMR Molybdenum trioxide J-C H XPS 34-propylenedioxypiyrrole Back contact Absorption spectroscopy Characterization Aluminum phthalocyanine chloride Ftouhi CIGSe ABSORPTION Titanium dioxide Aniline and thiophene derivatives BaTiO3 BTO Band alignment A Fullerenes A Thin films Solar cells Atomic force microscopy 4-ethylenedioxypyrrole Band gap gradient E171 Silicon Photovoltaics Fill factor Thin films TIO2 Photoluminescence B Vapour deposition Active layers ALPHA-AMYLASE Arzel Lamkaouane Photoemission spectroscopy Organic solar cells Copper indium gallium selenide Cattin Band-gap Sodium GaSe2 X-ray diffraction Solar cell Band diagram Adsorption Raman Aminofluorene thiophene derivatives Absorption Epitaxy ATR-FTIR Actinide conditioning ADSORPTION N-doping Molybdenum oxide Anatase colloidal solution for printing Tandem solar cells Thin film Partial shading Anode buffer layer ADDITIVE E171 Electrical properties Planar heterojunctions Nanoparticles Alternative buffers A Interfaces Ambipolar material Thin-film solar cells A ITO free electrode Aluminum-doped zinc oxide Buffer layer Reverse bias 4-ethylenedioxythiophene Alpha-sexithiophene Planar heterojunction Electropolymerization Aqueous colloidal solution Anatase Anode CuIn Surface morphology L Ambipolar organic layer Bernède 4-propylenedioxythiophene 2D nanomaterials CIGS Alternative module structure