Journal
JOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume 52, Issue 47, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/1361-6463/ab3b3e
Keywords
cathodoluminescence; SrTiO3; dislocations; oxygen vacancies
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Funding
- JSPS KAKENHI [18K04248]
- National Natural Science Foundation of China [61604131]
- Natural Science Foundation of Zhejiang Province [LY19F040009, LY17F040005]
- Science Foundation of Zhejiang Sci-Tech University [16062067-Y]
- Grants-in-Aid for Scientific Research [18K04248] Funding Source: KAKEN
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The impact of dislocations on oxygen vacancies in un-doped SrTiO3 single crystal has been investigated by cathodoluminescence (CL). The dominated luminescence peak located at similar to 2.8 eV is originated from oxygen vacancies. Enhanced luminescence has been observed at specific dislocations with the accumulation of oxygen vacancies. Under annealing either in oxidizing or reducing atmosphere, the diffusivity of oxygen ions at dislocation cores is nearly the same as that in the bulk. CL results suggest that the accumulation of oxygen vacancies is easily triggered by dislocations, while the diffusion of oxygen vacancies may not be significantly affected.
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