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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.)

Synthesis and characterization of optical properties of soft and hard Er3+-doped (K Na)NbO3 piezophotonic ceramics

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dos Santos, M. C. [1] ; Eiras, J. A. [2] ; Lente, M. H. [1]
Total Authors: 3
[1] Univ Fed Sao Paulo, Inst Ciencia & Tecnol, Grp Mat Multifuncionais & Sensores, Sao Jose Dos Campos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Fis, Grp Mat Ferro, Sao Carlos, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Ferroelectrics; v. 557, n. 1, SI, p. 73-84, MAR 11 2020.
Web of Science Citations: 0

Real-time tuning of photoluminescence properties are highly desirable for potential applications. Thus, one proposed approach is to tune the photoluminescence emissions by applying an external electric field. However, in order to switch the ferroelectric polarization, high quality bulk ceramics is demanded. In this work, soft and hard Er3+-doped (K,Na)NbO3 piezophotonic ceramics were prepared by the conventional route and their microstructural, structural and up-conversion emission properties were investigated. Dense and free from secondary phases ceramics were successfully produced. The photoluminescence spectra, in the visible range, were characterized as a function of the pumping power. For the soft composition, a remarkable green shift was verified with increasing the laser power. It was supposed that the excited state absorption, involving a three-photon absorption process, was involved in the S-4(3/2)-> I-4(15/2) transition. For the hard composition, the two-photon absorption process was dominant and the presence of complex defects reduced significantly the F-4(9/2)-> I-4(15/2) transition. (AU)

FAPESP's process: 18/16609-8 - Piezo-photonic ceramics: production and characterization of physical properties
Grantee:Mayara Cardozo dos Santos
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 17/17543-8 - Synthesis and tuning of the optical properties by piezoelectric effect in (Na K)(Nb Er)O3 based piezophotonic ceramics
Grantee:Manuel Henrique Lente
Support Opportunities: Regular Research Grants