Rеvuе des Energies Renouvelables
Volume 18, Numéro 2, Pages 193-198
2015-06-30

Nanostructured Solar Cells Based On Moo3 Film Deposition

Authors : Boutaleb Y. . Rehamnia R. . Berredjem Y. . Bernède J.c. .

Abstract

Electrodeposited molybdenum oxide thin films are used as a buffer layer between the indium tin oxide (ITO) anode and the organic electron acceptor film in organic solar cells. The MoO3 films are deposited at room temperature using a solution of molybdic, acid and citric acid as complexing agents. Such electrodeposited MoO3 ultra thin films (10-20 nm) has been used as buffer layer (BF) in ITO/BF/copper phthalocyanine (CuPc)/fullerene (C60)/ aluminium tri (8-hydroxyquinoline) (Alq3)/ aluminium photovoltaic cells. It is shown that this electrodeposited MoO3 buffer layer enhances the charge transfer from CuPc to ITO through a decrease of the effective barrier, present at the interface CuPc/ITO. This improving effect is directly highlighted by the shape of the J-V curves. The kink effect, due to the barrier present at the interface ITO/organic, disappears when the electrodeposited molybdenum oxide buffer layer, is introduced at this interface, which testifies of the decrease of the barrier.

Keywords

Electrochemical deposition, Organic solar cells, Molybdenum oxide buffer layer.