Open AccessWhite light emitting dysprosium doped lanthanum oxalate single crystals
Author(s) -
S Vandana,
Cyriac Joseph
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2070/1/012097
Subject(s) - lanthanum , dysprosium , oxalate , analytical chemistry (journal) , materials science , doping , lanthanide , luminescence , absorption spectroscopy , ion , nuclear chemistry , crystallography , chemistry , inorganic chemistry , optics , physics , optoelectronics , organic chemistry , chromatography
Single crystals of Lanthanum oxalate [La 2 (C 2 O 4 ) 3 ]1OH 2 O and Dy 3+ doped Lanthanum oxalate [La 2-x Dy x (C 2 O 4 ) 3 ]10H 2 O with x=0.1, 0.15, 0.2 were grown by gel method and characterised by X-ray powder diffraction analysis. Thermal stability of sample was investigated by thermo gravimetric analysis. UV-Visible absorption and photo-luminescent studies were also conducted. The emission spectrum on exciting at 271nm and 364 nm were recorded in which Dy 3+ ions showed four emission bands at positions 458nm (blue), 478 nm (blue), 572 nm (yellow) and 655 nm (red) corresponding to transitions 4 I 15/2 → 6 H 15/2 , 4 F 9/2 → 6 H 15/2 , 4 F 9/2 → 6 H 13/2 and 4 F 9/2 → 6 H 11/2 respectively. The CIE coordinates, colour purity and CCT values were calculated, and all these parameters show that Dy 3+ doped lanthanum oxalate single crystals are suitable candidates for white light emitting applications.