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Photoluminescence induced by thermal annealing in SrTiO3 thin film

Title
Photoluminescence induced by thermal annealing in SrTiO3 thin film
Authors
Rho J.Jang S.Ko Y.D.Kang S.Kim D.-W.Chung J.-S.Kim M.Han M.Choi E.
Ewha Authors
김동욱
SCOPUS Author ID
김동욱scopus
Issue Date
2009
Journal Title
Applied Physics Letters
ISSN
0003-6951JCR Link
Citation
vol. 95, no. 24
Indexed
SCI; SCIE; SCOPUS WOS scopus
Abstract
We have grown SrTiO3 thin films by rf-sputtering and studied its photoluminescence (PL) property after postannealing treatments. While the as-grown film does not show any PL signal, visible frequency PL emissions are induced by high temperature (T>550 °C) annealing. When subsequent low-T (50 °C) and long term (>8 months) annealing was made, the PL-spectra evolved into another pattern in which four distinct luminescence peaks appear simultaneously at λ=1.8, 2.2, 2.7, and 3.1 eV. We propose that these remarkable room temperature PL effects are due to both metastable and energetically stabilized defect states formed inside the band gap. © 2009 American Institute of Physics.
DOI
10.1063/1.3275707
Appears in Collections:
자연과학대학 > 물리학전공 > Journal papers
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