Solution Processed TiO2/BiFeO3 Solar Cells

Abstract

We report the fabrication of solar cells by spin-coating and annealing sol-gel layers of TiO<inf>2</inf> and BiFeO<inf>3</inf> on indium oxide coated glass substrates. A layer of poly(3-hexylthiophene) was spin coated onto the inorganic layers to form hybrid organic-inorganic solar cells. X-ray powder diffraction revealed the BiFeO<inf>3</inf> layers are polycrystalline with rhombohedral texture and average crystallite size about 20 nm. Scanning electron microscopy images showed the films are granular and microporous. Irradiation with visible light resulted in a photocurrent of 0.05 mA cm-2 and an open circuit voltage of -0.46 V. © 2015 Elsevier B.V. All rights reserved.