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Boosting Upconversion Photoluminescence and Multielectrical Properties via Er-Doping-Modulated Vacancy Control in Ba 0.85 Ca 0.15 Ti 0.9 Zr 0.1 O 3 .
- Source :
-
ACS omega [ACS Omega] 2019 Jun 24; Vol. 4 (6), pp. 11004-11013. Date of Electronic Publication: 2019 Jun 24 (Print Publication: 2019). - Publication Year :
- 2019
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Abstract
- The lead-free 0.5(Ba <subscript>0.7</subscript> Ca <subscript>0.3</subscript> )TiO <subscript>3</subscript> -0.5Ba(Ti <subscript>0.8</subscript> Zr <subscript>0.2</subscript> )O <subscript>3</subscript> (BCTZ) ceramics with Er doping have shown good upconversion photoluminescence (PL) and desirable optical temperature sensing properties. To bridge a relationship between the structure/intrinsic defects and properties of rare-earth-doped ferroelectrics, we designed and fabricated a series of BCTZ ceramics doped with 1 mol % Er <superscript>3+</superscript> by combining the first-principles calculations and experimental measurements. Theoretically, we discovered that Er can occupy both A sites (i.e., replacing Ba or Ca) and B sites (i.e., replacing Ti or Zr) in the BCTZ lattice and highlighted that the Er-doping-induced vacancy concentration decreases for both the oxygen vacancies ( V <subscript>o</subscript> ) and cation vacancies ( V <subscript>c</subscript> ). Experimentally, the enhanced PL performance and the dielectric, ferroelectric, and piezoelectric properties of the Er-doped BCTZ ceramics have been observed. Finally, the physical origin of Er-induced property enhancement in BCTZ has been elaborated according to the charge density and chemical bonding analysis. These results open up a path to investigate the effects of site substitution and vacancies on optoelectronic properties of multifunctional rare-earth-doped ferroelectrics.<br />Competing Interests: The authors declare no competing financial interest.
Details
- Language :
- English
- ISSN :
- 2470-1343
- Volume :
- 4
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- ACS omega
- Publication Type :
- Academic Journal
- Accession number :
- 31460198
- Full Text :
- https://doi.org/10.1021/acsomega.9b01391