Khan, A. F. and Haranath, D. and Yadav, Ravishanker and Singh, Sukhvir and Chawla, S. and Dutta, V. (2008) Controlled surface distribution and luminescence of YVO4:Eu3+ nanophosphor layers. Applied Physics Letters, 93 (7). 073103-1-073103-3. ISSN 1077-3118

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A method of dispersing YVO4:Eu quantum dots (QDs) as uniform two-dimensional (2D) layers with a high degree of homogeneity is presented. Annealing at 773 K resulted in coalescence of QDs to form nanoclusters with size of ∼ 25 nm with an improved photoluminescence and ∼ 80% transmittance at 800 nm. An efficient 5D0-7F2 transition and lifetimes of ∼ 1038 μs for the characteristic Eu3+ emission were observed. The absorption and emission peaks showed a slight blueshift, due to quantum-size effect, as compared to that for the bulk counterpart. Our method of 2D layer deposition is useful to enhance spectral response of the solar cells.

Item Type: Article
Subjects: Physics
Depositing User: Ms Neetu Chandra
Date Deposited: 23 Jan 2013 11:43
Last Modified: 23 Jan 2013 11:43

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