Fabrication and photoluminescence of Eu-doped KNN-based transparent ceramics
Source abstract
Abstract
Transparent lead-free luminescent ceramics K0.47Na0.47Li0.06Nb0.94Bi0.06O3–Eu x (KNNLB:Eu) have been fabricated via hot-press sintering technology. The formation of perovskite KNNLB:Eu ceramics with highly densified microstructure was verified through X-ray diffraction and scanning electron microscopy studies. The transmittance spectra, photoluminescence excitation and emission spectra, dependence of the photoluminescence intensity on Eu3+ doping content as well as the luminescence decay curves were investigated. The KNNLB:Eu ceramics present high transmittance both in the near-infrared and the middle-infrared regions, and can be efficiently excited by near-ultraviolet and blue light to realize strong reddish luminescence. The red emission at around 613 nm is particularly intense, which is attributed to the electric dipole transition 5D0–7F2 of Eu3+. The PL properties are also discussed. The emission peak splitting of 5D0–7F2 transition is observed as a response to the change in crystal environment around Eu3+ in the KNNLB:Eu ceramics. With the novel intrinsic ferroelectric properties of KNN, the KNNLB:Eu ceramics could be promising candidates for multifunctional optoelectronic devices.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis · Multiferroics and related materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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