Back to Search
Start Over
Effect of precursor solutions stirring on deep level defects concentration and spatial distribution in low temperature aqueous chemical synthesis of zinc oxide nanorods
- Source :
- AIP Advances, Vol 5, Iss 8, Pp 087180-087180-10 (2015)
- Publication Year :
- 2015
- Publisher :
- AIP Publishing LLC, 2015.
-
Abstract
- Hexagonal c-axis oriented zinc oxide (ZnO) nanorods (NRs) with 120-300 nm diameters are synthesized via the low temperature aqueous chemical route at 80 degrees C on silver-coated glass substrates. The influence of varying the precursor solutions stirring durations on the concentration and spatial distributions of deep level defects in ZnO NRs is investigated. Room temperature micro-photoluminesnce (mu-PL) spectra were collected for all samples. Cathodoluminescence (CL) spectra of the as-synthesized NRs reveal a significant change in the intensity ratio of the near band edge emission (NBE) to the deep-level emission (DLE) peaks with increasing stirring durations. This is attributed to the variation in the concentration of the oxygen-deficiency with increasing stirring durations as suggested from the X-ray photoelectron spectroscopy analysis. Spatially resolved CL spectra taken along individual NRs revealed that stirring the precursor solutions for relatively short duration (1-3 h), which likely induced high super saturation under thermodynamic equilibrium during the synthesis process, is observed to favor the formation of point defects moving towards the tip of the NRs. In contrary, stirring for longer duration (5-15 h) will induce low super saturation favoring the formation of point defects located at the bottom of the NRs. These findings demonstrate that it is possible to control the concentration and spatial distribution of deep level defects in ZnO NRs by varying the stirring durations of the precursor solutions. Funding Agencies|Avdanced Functional Materials (AFM) SFO project at Linkoping Univeristy, Sweden
- Subjects :
- Aqueous solution
Photoluminescence
Materials science
Analytical chemistry
General Physics and Astronomy
chemistry.chemical_element
Cathodoluminescence
Zinc
Condensed Matter Physics
Crystallographic defect
Concentration ratio
lcsh:QC1-999
X-ray photoelectron spectroscopy
chemistry
Nanorod
Den kondenserade materiens fysik
lcsh:Physics
Subjects
Details
- Language :
- English
- ISSN :
- 21583226
- Volume :
- 5
- Issue :
- 8
- Database :
- OpenAIRE
- Journal :
- AIP Advances
- Accession number :
- edsair.doi.dedup.....44711e5c360e393085f72d1f5045aa87