caa a22 4500 605546045 CHVBK 20210128100938.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s00723-015-0697-9 doi (NATIONALLICENCE)springer-10.1007/s00723-015-0697-9 Spectral Investigations on Cu2+-doped Li2CaAl4(PO4)4F4 Phosphors [Elektronische Daten] [B. Raja, M. Yadav, V. Manjari, K. Ravindranadh, M. Avinash, R. Ravikumar] Cu2+-doped Li2CaAl4(PO4)4F4 nanophosphor has been synthesized using solid-state reaction method at room temperature. The prepared phosphor is characterized by powder X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), optical absorption, photoluminescence (PL), electron paramagnetic resonance (EPR) and Fourier transform infrared (FT-IR) techniques. From powder XRD pattern, the evaluated average crystallite size is in the order of nanoscale. Morphological studies of prepared sample were analyzed using SEM and TEM. The optical absorption spectrum reveals that Cu2+ enters into the tetragonally distorted octahedral site in the host lattice. Spin-Hamiltonian, crystal field and bonding parameters are evaluated from the EPR spectrum. The PL spectrum of Cu2+-doped Li2CaAl4(PO4)4F4 phosphor gives emission peaks in the UV and blue region. The FT-IR spectrum exhibited bands which are attributed to vibrations of phosphate ions, P-O-H and water molecules. Springer-Verlag Wien, 2015 Raja B. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Yadav M. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Manjari V. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Ravindranadh K. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Avinash M. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Ravikumar R. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut Applied Magnetic Resonance Springer Vienna 46/8(2015-08-01), 953-964 0937-9347 46:8<953 2015 46 723 https://doi.org/10.1007/s00723-015-0697-9 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00723-015-0697-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Raja B. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 700 1- Yadav M. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 700 1- Manjari V. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 700 1- Ravindranadh K. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 700 1- Avinash M. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 700 1- Ravikumar R. Department of Physics, Acharya Nagarjuna University, Nagarjuna Nagar, 522 510, Guntur, AP, India aut NATIONALLICENCE 773 0- Applied Magnetic Resonance Springer Vienna 46/8(2015-08-01), 953-964 0937-9347 46:8<953 2015 46 723