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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Probing the effects of oxygen-related defects on the optical and luminescence properties in CaCu3Ti4O12 ceramics

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Felix, A. A. [1] ; Spreitzer, M. [2] ; Vengust, D. [2] ; Suvorov, D. [2] ; Orlandi, M. O. [1]
Total Authors: 5
[1] Sao Paulo State Univ, Chem Inst, Phys Chem Dept, UNESP, Araraquara, SP - Brazil
[2] Jozef Stefan Inst, Adv Mat Dept, Ljubljana - Slovenia
Total Affiliations: 2
Document type: Journal article
Source: Journal of the European Ceramic Society; v. 38, n. 15, p. 5002-5006, DEC 2018.
Web of Science Citations: 1

The formation of oxygen-related lattice defects and their influence on optical and electronic properties in CaCu3Ti4O12 (CCTO) ceramics were studied by controlling the oxygen partial pressure during the sintering process at high temperatures. The samples were analyzed using complementary bulk spectroscopic techniques such as photoluminescence spectroscopy, ultraviolet-visible spectroscopy, Fourier-transform infrared spectroscopy, and electron paramagnetic resonance. Our comprehensive study shows that the oxygen content during sintering process exerts considerable control over the type and concentration of oxygen-related defects in the crystalline CCTO structure. Our results also suggest that the formation of different types of oxygen-related defects in the structure modifies electronic energy levels and thus directly affects the electronic and optical properties of the CCTO phase. These results provided further insight into the important role of oxygen in the crystalline defect arrangement in polycrystalline CCTO ceramics. (AU)

FAPESP's process: 13/14647-6 - Gas sensors based on p-type metal semiconductor oxides: in-situ and operando advanced studies
Grantee:Anderson André Felix
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC
FAPESP's process: 12/51195-3 - Modeling effects of sensor response of semiconducting oxide with functionalized nanoparticles
Grantee:José Arana Varela
Support type: Regular Research Grants
FAPESP's process: 09/00367-6 - Study of Properties of CaCu3Ti4O12 Nanostructured Films.
Grantee:Anderson André Felix
Support type: Scholarships in Brazil - Doctorate