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