Structural, electrical, and photoluminescence properties of Pr3+ doped Na0.25K0.25Bi2.5Nb2O9 bismuth layer-structure ceramics
Structural, electrical, and photoluminescence properties of Pr3+ doped Na0.25K0.25Bi2.5Nb2O9 bismuth layer-structure ceramics
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Pr3掺杂Na0.25K0.25Bi2.5Nb2O9铋层状结构陶瓷的结构、电学和光致发光性能
DOI：
10.1007/s10854-017-6442-4
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发表时间：
2017-03
期刊：
影响因子：
--
通讯作者：
Jiang Yalin
中科院分区：
文献类型：
--
作者：
Luo Yuhan;Jiang Xiangping;Chen Chao;Chen Yunjing;Tu Na;Xia Xiang;Jiang Yalin
In this paper, Pr3+ doped Na0.25K0.25Bi2.5Nb2O9 (NKBN-xPr3+) ceramics were successfully prepared via a conventional solid-state reaction process. The structural, dielectric, and piezoelectric properties as well as photoluminescence performance of the samples were systemically studied. All the ceramic samples possessed a pure two-layered bismuth layer-structure with the A21am space group. Raman spectra revealed that the doped Pr3+ ions mainly replaced Bi3+ at the A-sites in the pseudo-perovskite layers. With increasing Pr3+ concentration, the Curie temperature and the maximum dielectric constant of the samples decreased, while the piezoelectric constant d33 increased from 15 pC/N for x = 0 to 21 pC/N for x = 0.01. Addition, d33 remained almost unchanged for all samples when the annealing temperature was lower than 450 °C. Under excitation with 452 nm light, the obtained samples exhibited a typical emission of Pr3+ ions, with the strongest red emission peak centered at 609 nm. The corresponding color tone of the ceramics shifted from red-orange to orange-yellow with increasing Pr3+ doping. The thermal quenching behavior of the photoluminescence of the x = 0.01 sample was also investigated in detail, and the thermal quenching activation energy was calculated to be 0.4473 eV. Our study indicated that NKBN-xPr3+ ceramics may have potential applications in multi-functional devices.
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