Sahoo, T and Pradhan, G. K. and Rath, M. K. and Pandey, B and Verma, H. C. and Nandy, S and Chattopadhyay, K. K. and Anand, S (2007) Characterization and photoluminescence studies on hydrothermally synthesized Mn-doped barium titanate nano powders. Materials Letters, 61 (26). 4821 - 4823.
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Official URL: http://www.sciencedirect.com/science/article/B6TX9...
Manganese doped cubic barium titanate nanocrystals with [Mn/Ti] mole percent varying from 0.1 to 3 were prepared through hydrothermal route at 150 °C. The mean crystallite diameters obtained for different Mn concentrations varied within 26 to 30 nm. TEM of a typical sample showed most of the particles as single crystallites (particle size 15–40 nm) with some weakly agglomerated particles. The photo luminescent (PL) spectra of each sample showed a sharp peak in the blue band centered approximately at 464 nm and a weaker peak in the green band centered nearly at 494 nm. The luminescent efficiency passed through maxima for the sample with 2% [Mn/Ti] molar ratio. Effect of calcination temperature in the range of 200 to 600 °C on PL spectra showed that the intensity of peak corresponding to blue region decreased with the increase in calcination temperature from 200 to 600 °C and for the sample calcined at 600 °C, only a broad peak corresponding to green luminescence region was observed.
|Uncontrolled Keywords:||Barium titanate; Cubic symmetry; Blue luminescent; Manganese; Acceptor dopant|
|Subjects:||Material Science > Nanostructured materials|
|Deposited On:||10 Feb 2010 09:25|
|Last Modified:||10 Feb 2010 09:25|
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