Photoluminescence induced by thermal annealing in SrTiO3 thin film

Jaehoon Rho; Seunghun Jang; Young Dong Ko; Seungjin Kang; Dong Wook Kim; J. S. Chung; Miyoung Kim; Moonsup Han; Eunjip Choi

doi:10.1063/1.3275707

Photoluminescence induced by thermal annealing in SrTiO₃ thin film

Jaehoon Rho, Seunghun Jang, Young Dong Ko, Seungjin Kang, Dong Wook Kim, J. S. Chung, Miyoung Kim, Moonsup Han, Eunjip Choi

Department of Physics

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

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.

Original language	English
Article number	241906
Journal	Applied Physics Letters
Volume	95
Issue number	24
DOIs	https://doi.org/10.1063/1.3275707
State	Published - 14 Dec 2009

Bibliographical note

Funding Information:
We thank S. Han, J. Yu, and Y. Choi for useful discussions. This work was supported by Nuclear Research and Development Program of the Korea Science and Engineering Foundation (KOSEF), grant funded by the Korean government (MEST, under Grant No. 20090067238). D.W.K. was supported by the Pioneer Research Center Program (Grant No. 2009-0083007) through the National Research Foundation of Korea, grant funded by the Korea government (MEST). Y.-D.K. was supported by Seoul R & BD program (Grant No. 10543). S.J.K. and M.K. were supported by the Korea Science and Engineering Foundation (KOSEF) (Grant No. R0A-2007-000-10014-0).

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10.1063/1.3275707

Cite this

@article{619ab150375e495e814c2e0fdadda140,

title = "Photoluminescence induced by thermal annealing in SrTiO3 thin film",

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.",

author = "Jaehoon Rho and Seunghun Jang and Ko, {Young Dong} and Seungjin Kang and Kim, {Dong Wook} and Chung, {J. S.} and Miyoung Kim and Moonsup Han and Eunjip Choi",

note = "Funding Information: We thank S. Han, J. Yu, and Y. Choi for useful discussions. This work was supported by Nuclear Research and Development Program of the Korea Science and Engineering Foundation (KOSEF), grant funded by the Korean government (MEST, under Grant No. 20090067238). D.W.K. was supported by the Pioneer Research Center Program (Grant No. 2009-0083007) through the National Research Foundation of Korea, grant funded by the Korea government (MEST). Y.-D.K. was supported by Seoul R & BD program (Grant No. 10543). S.J.K. and M.K. were supported by the Korea Science and Engineering Foundation (KOSEF) (Grant No. R0A-2007-000-10014-0).",

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doi = "10.1063/1.3275707",

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AU - Rho, Jaehoon

AU - Jang, Seunghun

AU - Ko, Young Dong

AU - Kang, Seungjin

AU - Kim, Dong Wook

AU - Chung, J. S.

AU - Kim, Miyoung

AU - Han, Moonsup

AU - Choi, Eunjip

N1 - Funding Information: We thank S. Han, J. Yu, and Y. Choi for useful discussions. This work was supported by Nuclear Research and Development Program of the Korea Science and Engineering Foundation (KOSEF), grant funded by the Korean government (MEST, under Grant No. 20090067238). D.W.K. was supported by the Pioneer Research Center Program (Grant No. 2009-0083007) through the National Research Foundation of Korea, grant funded by the Korea government (MEST). Y.-D.K. was supported by Seoul R & BD program (Grant No. 10543). S.J.K. and M.K. were supported by the Korea Science and Engineering Foundation (KOSEF) (Grant No. R0A-2007-000-10014-0).

PY - 2009/12/14

Y1 - 2009/12/14

N2 - 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.

AB - 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.

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