xLiNbO^sub 3^-(1-x)(K,Na)NbO^sub 3^ ceramics: A new class of phosphors with tunable upconversion luminescence by external electric field and excellent optical temperature sensing property

In this study, Er3+-doped and Er3+/Yb3+-co-doped xLiNbO3-(1-x)(K,Na)NbO3 (xLN-(1-x)KNN) ferroelectric ceramics were synthesized by a solid state reaction process and the samples were found to exhibit tunable upconversion luminescence (UCL) under an external electric field as well as excellent optica...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 770; p. 214
Main Authors Zhang, Ying, Wang, Xusheng, Ye, Huihua, Li, Yongxiang, Yao, Xi
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier BV 05.01.2019
Subjects
Ceramics
Chemical synthesis
Electric fields
Erbium
Ferroelectric materials
Ferroelectricity
Ferroelectrics
Luminescence
Niobium oxides
Optical properties
Optoelectronics
Phosphors
Phosphorus
Sensitivity
Temperature sensors
Upconversion
Ytterbium
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Summary:In this study, Er3+-doped and Er3+/Yb3+-co-doped xLiNbO3-(1-x)(K,Na)NbO3 (xLN-(1-x)KNN) ferroelectric ceramics were synthesized by a solid state reaction process and the samples were found to exhibit tunable upconversion luminescence (UCL) under an external electric field as well as excellent optical temperature-sensing properties. By altering the polarization time, UCL intensity was effectively controlled under an external electric field. Furthermore, an optimal UCL was observed in a 0.4LN-0.6KNN:Er3+,3Yb3+ sample and its excellent optical temperature sensitivity (0.006 K−1 at 643 K) from 83 to 663 K was 131% higher than that of 0.4LN-0.6KNN:Er3+. These results suggested that xLN-(1-x)KNN ferroelectric ceramics were promising candidates for an opto-electronic integrator and optical temperature sensors with high sensitivity and broad temperature range.
ISSN:0925-8388
1873-4669