NOVELTY - A photovoltaic cell (100) comprises a first electrode (20); an electron transporting layer (ETL) (30); a photoactive layer (40); hole transporting layer (HTL) (50); and a second electrode (60), where the ETL is ultraviolet-ozone (UVO)-treated. The photovoltaic cell has an inverted configuration, such that the first electrode is a cathode, the ETL is on the first electrode, and the second electrode is an anode.    USE - As photovoltaic cells for capturing light energy from light (claimed).    ADVANTAGE - The use of transition metal oxides like molybdenum oxide along with Ag or Al as an anode contact provides enhanced hole-extraction compared with the conventional PEDOT:PSS contact. The inverted device geometry provides compatibility with large-scale R2R processing methods for ease of processing and improved device stability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) a method of fabricating photovoltaic cell, involving: forming an ETL on a first electrode; performing UVO treatment on the ETL to provide a UVO-treated ETL; forming a photoactive layer on the UVO-treated ETL; forming an HTL on the photoactive layer; and forming a second electrode on the HTL. The step of forming the ETL involves sputtering or solution processing a metal oxide. When the ETL is a ZnO-PVP nanocomposite film, the step of forming the ETL involves baking a coated mixture of zinc acetate and PVP in a solvent, where the solvent is ethanol, and/or ethanolamine. The step of forming the HTL involves thermal evaporation or solution processing. The step of forming the photoactive layer involves sputtering, co-evaporation, or solution processing. When the first electrode is a cathode, the second electrode is an anode; and    (2) a method of capturing light energy from light, involving: providing photovoltaic cell such that the light is incident upon the photovoltaic cell, where the photovoltaic cell comprises: a first electrode; an ETL; a photoactive layer; an HTL; and a second electrode, where the ETL is UVO-treated.    DESCRIPTION OF DRAWING(S) - The figure shows a cross-sectional view of a photovoltaic cell.    First electrode of indium tin oxide (20)    Electron transporting layer of zinc oxide (30)    Photoactive layer (40)    Hole transporting layer of molybdenum oxide (50)    Second electrode of silver (60)    Photovoltaic cell (100)