We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Flux Synthesis, Monoclinic Structure, and Luminescence of Europium(III)‐Doped K<sub>3</sub>La(PO<sub>4</sub>)<sub>2</sub>.
- Authors
Terebilenko, Kateryna V.; Kyselov, Dmitryi V.; Baumer, Vyacheslav N.; Slobodyanik, Mykola S.; Petrenko, Olga V.; Khomenko, Olena V.; Dotsenko, Volodymir P.
- Abstract
Single crystals of potassium lanthanum orthophosphate are prepared from high‐temperature melts containing potassium molybdate as a flux and structurally investigated by single‐crystal X‐ray diffraction. The framework is shown to be constructed from isolated LaO7 monocapped prisms and PO4 tetrahedra through corner‐ and edge‐sharing giving rise to 2D sheets with composition [La(PO4)2]3−. Three types of potassium cations reside between these layers. For the solid solutions K3La1−xEux(PO4)2 (x = 0.1–0.9) prepared by the solid‐state route, the excitation and emission luminescence spectra are studied at room temperature. The emission spectra exhibit strong reddish performance, which is due to the 5D0→7FJ transitions of Eu3+ ions. The correlation between the structure and the photoluminescent properties of the phosphors is studied. The energy transfer and concentration quenching of the phosphors are discussed. Solid solutions K3La1−xEux(PO4)2 have a potential application for white‐light‐emitting diodes. Single crystals of K3La(PO4)2 are successfully synthesized using K–Mo–O molten salts. Two emission centers are present in K3La1−xEux(PO4)2 crystals associated with Eu3+ ions on La3+ sites. The first type is related to "isolated" Eu3+ and the second one is attributed to Eu3+–Eu3+ dimers. Compounds K3La1−xEux(PO4)2 are found to have a potential application for white‐light‐emitting diodes.
- Subjects
SINGLE crystals; EUROPIUM; FLUX (Metallurgy); X-ray diffraction; PHOTOLUMINESCENCE; FUSED salts
- Publication
Crystal Research & Technology, 2018, Vol 53, Issue 10, pN.PAG
- ISSN
0232-1300
- Publication type
Article
- DOI
10.1002/crat.201800158