Abstract
Delafossite CuFeO2 thin films were successfully prepared onto quartz substrates using simple spray pyrolysis technique. Post annealing under nitrogen atmosphere for 2 h was necessary to form delafossite CuFeO2 phase. The effect of alteration in annealing temperature (T-A) 800, 850 and 900 degrees C was study on structural, morphology and optical properties. The XRD results for thin film annealed at T-A = 850 degrees C show single phase CuFeO2 with rhombohedral crystal system and R (3) over barm space group with preferred orientation along (0 1 2). The prepared copper iron oxide thin films have an optical transmission ranged similar to 40% in the visible region. The optical direct optical band gap of the prepared thin films was ranged similar to 2.9 eV. (C) 2018 Elsevier B.V.