Back to Search
Start Over
Crystalline nanostructured Cu doped ZnO thin films grown at room temperature by pulsed laser deposition technique and their characterization
- Source :
- Applied Surface Science. 270:104-108
- Publication Year :
- 2013
- Publisher :
- Elsevier BV, 2013.
-
Abstract
- We report structural and optical properties of Cu doped ZnO (ZnO:Cu) thin films deposited on glass substrate at room temperature by pulsed laser deposition (PLD) method without pre and post annealing contrary to all previous reports. For preparation of (ZnO:Cu) composites pure Zn and Cu targets in special geometrical arrangements were exposed to 248 nm radiations generated by KrF exciter laser. The laser energy was 200 mJ with 10 Hz frequency and 20 ns pulse width. The effect of Cu concentration on crystal structure, morphology, and optical properties were investigated by XRD, FESEM and photoluminescence spectrometer respectively. A systematic shift in ZnO (0 0 2) peak with Cu concentration observed in XRD spectra demonstrated that Cu ion has been incorporated in ZnO lattice. Uniform film with narrow size range grains were observed in FESEM images. The photoluminescence (PL) spectra measured at room temperature revealed a systematic red shift in ZnO emission peak and decrease in the band gap with the increase in Cu concentration. These results entail that PLD technique can be realized to deposit high quality crystalline ZnO and ZnO:Cu thin films without pre and post heat treatment which is normally practiced worldwide for such structures.
- Subjects :
- Photoluminescence
Materials science
Band gap
Annealing (metallurgy)
Analytical chemistry
General Physics and Astronomy
Surfaces and Interfaces
General Chemistry
Crystal structure
Condensed Matter Physics
Laser
Spectral line
Surfaces, Coatings and Films
Pulsed laser deposition
law.invention
law
Thin film
Subjects
Details
- ISSN :
- 01694332
- Volume :
- 270
- Database :
- OpenAIRE
- Journal :
- Applied Surface Science
- Accession number :
- edsair.doi...........dc665cb985cf22496d4217e9f896f107
- Full Text :
- https://doi.org/10.1016/j.apsusc.2012.12.126