Spray Deposited Nanostructured CuO Thin Films: Influence of Substrate Temperature and Annealing Process
AUTOR(ES)
Zare Asl, Hassan, Mohammad Rozati, Seyed
FONTE
Mat. Res.
DATA DE PUBLICAÇÃO
11/01/2018
RESUMO
In this study, CuO thin films were deposited on glass substrates at a wide range of temperatures from 450ºC to 550ºC with steps of 25ºC by chemical spray pyrolysis technique. Aiming to investigate the effect of annealing process, one of the resulting films was annealed at 450ºC for 3 hours under ambient air. Based on X-ray diffraction, all the resulting films are monoclinic with two prominent peaks at ~36º and ~39º. The crystallite size of the CuO film deposited at 450ºC was found to be the largest in comparison with the others. As the substrate temperature increased, a gradual change was observed for the CuO thin film surface morphology and in the case of annealed film, the grains and their boundaries became indistinguishable. The resistivity of the films was reduced by virtue of increasing the substrate temperature and also, both the mobility and carrier concentration of the annealed film were improved drastically after annealing. As expected, the CuO thin films absorption was considerable in the visible region and gradually declined after 800nm. The estimated band gap value of the CuO film deposited at 450ºC were fairly close to the optimum band gap for solar applications.
Documentos Relacionados
- Implication of low temperature and sonication on electrocrystallization mechanism of Cu thin films: a kinetics and structural correlation
- Positron Annihilation Spectroscopy Study on Annealing Effect of CuO Nanoparticles
- Influence of process parameters on the growth of pure-phase anatase and rutile TiO2 thin films deposited by low temperature reactive magnetron sputtering
- Synthesis and characterization of nanostructured TiO2 and TiO2/W thin films deposited by co-sputtering
- Morphology and stress study of nanostructured porous silicon as a substrate for PbTe thin films growth by electrochemical process