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

M. L. Crespillo; J. T. Graham; F. Agulló-López; Y. Zhang; W. J. Weber

doi:10.1080/21663831.2019.1604444

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

Original Report | 更新时间：2026-08-19

- The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states
- Materials Research Letters Vol. 7, Issue 7, Pages: 298-303(2019)
- 作者机构：
  
  1. Department of Materials Science and Engineering University of Tennessee Knoxville
  2. Department of Mining and Nuclear Engineering Missouri University of Science and Technology Rolla
  3. Centro de Microanálisis de Materiales CMAM-UAM Cantoblanco
  4. Department of Materials Science and Engineering University of Tennessee Knoxville TN USA
  5. Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge
- 作者简介：
- 基金信息：
- DOI：10.1080/21663831.2019.1604444
  CLC：
- Online First：17 April 2019，
  
  Published：2019
- 稿件说明：
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M. L. Crespillo, J. T. Graham, F. Agulló-López, et al. The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states[J]. Materials Research Letters, 2019, 7(7): 298-303.
DOI：

M. L. Crespillo, J. T. Graham, F. Agulló-López, et al. The blue emission at 2.8 eV in strontium titanate: evidence for a radiative transition of self-trapped excitons from unbound states[J]. Materials Research Letters, 2019, 7(7): 298-303. DOI： 10.1080/21663831.2019.1604444.

摘要

Abstract

BSTRACTThe origin of the blue emission in SrTiO

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.

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