DOI: 10.1063/1.368295 ISSN:
Fabrication of green and orange photoluminescent, undoped ZnO films using spray pyrolysis
S. A. Studenikin, Nickolay Golego, Michael Cocivera- General Physics and Astronomy
Photoluminescent, undoped ZnO films have been fabricated using spray pyrolysis of zinc nitrate solution. The luminescent films had a polycrystalline hexagonal wurtzite type structure with no preferred orientation. Photoluminescence intensity was critically dependent on substrate temperature during spray pyrolysis and on post-annealing temperature. Green, photoluminescent films possessed a porous structure while orange films possessed a close packed granular morphology. Green luminescence appears to be due to oxygen vacancies in a layer just below the crystallite surface.