Fabrication of green and orange photoluminescent, undoped ZnO films using spray pyrolysis
Abstract
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.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- August 1998
- DOI:
- 10.1063/1.368295
- Bibcode:
- 1998JAP....84.2287S
- Keywords:
-
- 81.15.Rs;
- 81.05.Dz;
- 81.05.Rm;
- 78.66.Hf;
- 71.55.Gs;
- 82.30.Lp;
- 78.55.Et;
- 61.72.Ji;
- 61.43.Gt;
- 68.55.Jk;
- Spray coating techniques;
- II-VI semiconductors;
- Porous materials;
- granular materials;
- II-VI semiconductors;
- II-VI semiconductors;
- Decomposition reactions;
- II-VI semiconductors;
- Point defects and defect clusters;
- Powders porous materials;
- Structure and morphology;
- thickness;
- crystalline orientation and texture