Near infrared and charge transfer luminescence of trivalent ytterbium in KLa(PO3)4 powders |
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| Authors: | M Ferhi K Horchani-Naifer S Hraiech M Férid Y Guyot G Boulon |
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| Institution: | 1. Laboratoire de Physico-chimie des Matériaux Minéraux et leurs Applications, Centre National de Recherches en Sciences des Matériaux, B.P. 95 Hammam-Lif, 2050, Tunisia;2. Laboratoire de Physico-Chimie des Matériaux Luminescents (LPCML), Université Claude Bernard Lyon 1, UMR 5620 CNRS, La Doua, 69622 Villeurbanne, France;1. Departamento de Física Aplicada I, Escuela Superior de Ingeniería, Universidad del País Vasco UPV/EHU, Alda. Urquijo s/n, 48013 Bilbao, Spain;2. Department of Excited States Spectroscopy, Institute of Low Temperature and Structure Research, Polish Academy of Sciences, 50-422 Wroclaw, Poland;3. Materials Physics Center CSIC-UPV/EHU, 20018 San Sebastián, Spain;1. Physics Dept., Science Faculty, Ibb University, Ibb, 70270, Yemen;2. Dept. of Basic Science, ElGazeera High Institute for Engineering and Technology, Cairo, 11865, Egypt;3. Physics Dept., Faculty of Science, Cairo University, Giza, 12613, Egypt;4. Physics Dept., Faculty of Science, Menoufia University, Shebin El Koom, 32511, Egypt;1. School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, China;2. State Key Laboratory of Crystal Material, Shandong University, Jinan, Shandong 250100, China;3. Research Institute of Tsinghua University in Shenzhen, Shenzhen, Guangdong 518057, China;1. Department of Applied Physics, Bhilai Institute of Technology (Seth Balkrishan Memorial), Near Bhilai House, Durg, C.G. 491001, India;2. Department of Physics, Govt. Autonomous Science College, Jabalpur, India;3. Department of Chemistry, Shri Shanakayacharya Vidhyalay Hudco, 490006, India |
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| Abstract: | The polycrystalline powders of condensed polyphosphates KLa(1 ? x)Ybx(PO3)4 (x = 5, 10, 15, 20%) with linear chain were prepared by solid-state reaction. These samples were characterized by X-ray diffraction, FTIR and Raman scattering spectroscopies. The obtained powders are formed by single monoclinic phase of type III of condensed polyphosphate KLa(PO3)4 (KLP) crystallized with P21 space group. Lattice parameters varied as a function of the ytterbium concentration. As the Yb3+ concentration increased, the crystal lattice parameters were decreased. For the first time, near infrared (NIR) and UV–Visible spectroscopy of Yb3+ in KLa(PO3)4 powders, at room temperature, are carried out. In the IR range, a broad band relative to the fundamental 2F5/2 → 2F7/2 emission was registered. In the UV–Visible spectra, two bands typical of the Yb3+ charge transfer band (CTB) luminescence are observed. The registered decay times of these two emission types showed low sensibility to the Yb3+ concentration in KLa(PO3)4. |
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