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Title: The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states

Abstract

The origin of the blue emission in SrTiO 3 has been investigated as a function of irradiation fluence, electronic excitation density, and temperature using a range of ion energies and masses. The emission clearly does not show correlation with the concentration of vacancies generated by irradiation but is greatly enhanced under heavy-ion irradiation. The intensity ratio of the 2.8 and 2.5 eV bands is independent of fluence at all temperatures, but it increases with excitation rate. The 2.8 eV emission is proposed to correspond to a transition from conduction band states to the ground state level of the self-trapped exciton center.

Authors:
ORCiD logo [1];  [2];  [3]; ORCiD logo [4]; ORCiD logo [5]
  1. Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of Tennessee, Knoxville, TN (United States); Missouri Univ. of Science and Technology, Rolla, MO (United States)
  3. Centro de Microanálisis de Materiales, CMAM-UAM, Cantoblanco, Madrid, Spain
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1508421
Alternate Identifier(s):
OSTI ID: 1509534
Grant/Contract Number:  
AC05-00OR22725; Contract DE-AC05-00OR22725
Resource Type:
Journal Article: Published Article
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 7; Journal Issue: 7; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Crespillo, M. L., Graham, J. T., Agulló-López, F., Zhang, Y., and Weber, W. J. The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states. United States: N. p., 2019. Web. doi:10.1080/21663831.2019.1604444.
Crespillo, M. L., Graham, J. T., Agulló-López, F., Zhang, Y., & Weber, W. J. The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states. United States. doi:10.1080/21663831.2019.1604444.
Crespillo, M. L., Graham, J. T., Agulló-López, F., Zhang, Y., and Weber, W. J. Wed . "The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states". United States. doi:10.1080/21663831.2019.1604444.
@article{osti_1508421,
title = {The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states},
author = {Crespillo, M. L. and Graham, J. T. and Agulló-López, F. and Zhang, Y. and Weber, W. J.},
abstractNote = {The origin of the blue emission in SrTiO3 has been investigated as a function of irradiation fluence, electronic excitation density, and temperature using a range of ion energies and masses. The emission clearly does not show correlation with the concentration of vacancies generated by irradiation but is greatly enhanced under heavy-ion irradiation. The intensity ratio of the 2.8 and 2.5 eV bands is independent of fluence at all temperatures, but it increases with excitation rate. The 2.8 eV emission is proposed to correspond to a transition from conduction band states to the ground state level of the self-trapped exciton center.},
doi = {10.1080/21663831.2019.1604444},
journal = {Materials Research Letters},
issn = {2166-3831},
number = 7,
volume = 7,
place = {United States},
year = {2019},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1080/21663831.2019.1604444

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Works referenced in this record:

Magnetic effects at the interface between non-magnetic oxides
journal, June 2007

  • Brinkman, A.; Huijben, M.; van Zalk, M.
  • Nature Materials, Vol. 6, Issue 7, p. 493-496
  • DOI: 10.1038/nmat1931