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Photoluminescence of spray pyrolysis deposited ZnO nanorods.

Kärber E, Raadik T, Dedova T, Krustok J, Mere A, Mikli V, Krunks M - Nanoscale Res Lett (2011)

Bottom Line: A dominant near band edge (NBE) emission is observed at 300 K and at 10 K.High-resolution photoluminescence measurements at 10 K reveal fine structure of the NBE band with the dominant peaks related to the bound exciton transitions.It is found that all studied technological parameters affect the excitonic photoluminescence in ZnO nanorods.PACS: 78.55.Et, 81.15.Rs, 61.46.Km.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Science, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia. malle@staff.ttu.ee.

ABSTRACT
Photoluminescence of highly structured ZnO layers comprising well-shaped hexagonal rods is presented. The ZnO rods (length 500-1,000 nm, diameter 100-300 nm) were grown in air onto a preheated soda-lime glass (SGL) or ITO/SGL substrate by low-cost chemical spray pyrolysis method using zinc chloride precursor solutions and growth temperatures in the range of 450-550°C. We report the effect of the variation in deposition parameters (substrate type, growth temperature, spray rate, solvent type) on the photoluminescence properties of the spray-deposited ZnO nanorods. A dominant near band edge (NBE) emission is observed at 300 K and at 10 K. High-resolution photoluminescence measurements at 10 K reveal fine structure of the NBE band with the dominant peaks related to the bound exciton transitions. It is found that all studied technological parameters affect the excitonic photoluminescence in ZnO nanorods.PACS: 78.55.Et, 81.15.Rs, 61.46.Km.

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Related in: MedlinePlus

Excitonic photoluminescence spectra at T = 10 K of ZnO nanorod layers deposited at different spray rates. The layers are deposited from aqueous solutions onto ITO/SGL substrates at 550°C with spray rate of 1.2, 2.2, and 6.2 ml/min, illustrated by spectrum A, B, and C, respectively. Spectrum A is shown with fitting results. The inset in the Figure 6 shows spectrum A in logarithmic scale.
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Figure 6: Excitonic photoluminescence spectra at T = 10 K of ZnO nanorod layers deposited at different spray rates. The layers are deposited from aqueous solutions onto ITO/SGL substrates at 550°C with spray rate of 1.2, 2.2, and 6.2 ml/min, illustrated by spectrum A, B, and C, respectively. Spectrum A is shown with fitting results. The inset in the Figure 6 shows spectrum A in logarithmic scale.

Mentions: The effect of the variation in the spray rate on PL properties of ZnONRL is presented as Figure 6. A decrease in the spray rate from 6.2 ml/min down to 1.2 ml/min increases the intensity of the exciton peak at 3.358-3.360 eV.


Photoluminescence of spray pyrolysis deposited ZnO nanorods.

Kärber E, Raadik T, Dedova T, Krustok J, Mere A, Mikli V, Krunks M - Nanoscale Res Lett (2011)

Excitonic photoluminescence spectra at T = 10 K of ZnO nanorod layers deposited at different spray rates. The layers are deposited from aqueous solutions onto ITO/SGL substrates at 550°C with spray rate of 1.2, 2.2, and 6.2 ml/min, illustrated by spectrum A, B, and C, respectively. Spectrum A is shown with fitting results. The inset in the Figure 6 shows spectrum A in logarithmic scale.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211449&req=5

Figure 6: Excitonic photoluminescence spectra at T = 10 K of ZnO nanorod layers deposited at different spray rates. The layers are deposited from aqueous solutions onto ITO/SGL substrates at 550°C with spray rate of 1.2, 2.2, and 6.2 ml/min, illustrated by spectrum A, B, and C, respectively. Spectrum A is shown with fitting results. The inset in the Figure 6 shows spectrum A in logarithmic scale.
Mentions: The effect of the variation in the spray rate on PL properties of ZnONRL is presented as Figure 6. A decrease in the spray rate from 6.2 ml/min down to 1.2 ml/min increases the intensity of the exciton peak at 3.358-3.360 eV.

Bottom Line: A dominant near band edge (NBE) emission is observed at 300 K and at 10 K.High-resolution photoluminescence measurements at 10 K reveal fine structure of the NBE band with the dominant peaks related to the bound exciton transitions.It is found that all studied technological parameters affect the excitonic photoluminescence in ZnO nanorods.PACS: 78.55.Et, 81.15.Rs, 61.46.Km.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Materials Science, Tallinn University of Technology, Ehitajate tee 5, 19086 Tallinn, Estonia. malle@staff.ttu.ee.

ABSTRACT
Photoluminescence of highly structured ZnO layers comprising well-shaped hexagonal rods is presented. The ZnO rods (length 500-1,000 nm, diameter 100-300 nm) were grown in air onto a preheated soda-lime glass (SGL) or ITO/SGL substrate by low-cost chemical spray pyrolysis method using zinc chloride precursor solutions and growth temperatures in the range of 450-550°C. We report the effect of the variation in deposition parameters (substrate type, growth temperature, spray rate, solvent type) on the photoluminescence properties of the spray-deposited ZnO nanorods. A dominant near band edge (NBE) emission is observed at 300 K and at 10 K. High-resolution photoluminescence measurements at 10 K reveal fine structure of the NBE band with the dominant peaks related to the bound exciton transitions. It is found that all studied technological parameters affect the excitonic photoluminescence in ZnO nanorods.PACS: 78.55.Et, 81.15.Rs, 61.46.Km.

No MeSH data available.


Related in: MedlinePlus