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Synthesis and luminescence spectroscopy study of a novel orange‐red colour emissions phosphor based on Tb 3+ ion‐doped Na 2 ZnP 2 O 7
Author(s) -
Belbal Rim,
Gacem Lakhdar,
Bentria Bachir,
Ait Ahsaine Hassan,
Soltani Mohamed Toufik,
Saidat Boubakeur,
Ghezal Elhadj Ahmed,
Gueddim Ahmed,
Guerbous Lakhdar
Publication year - 2021
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.3968
Subject(s) - chromaticity , phosphor , luminescence , photoluminescence , analytical chemistry (journal) , tetragonal crystal system , doping , materials science , impurity , emission spectrum , spectroscopy , ion , chemistry , spectral line , crystal structure , optics , crystallography , optoelectronics , physics , organic chemistry , chromatography , quantum mechanics , astronomy
Here, we report the synthesis and study of new orange‐red (OR) colour‐emitting phosphors Na 2 ZnP 2 O 7 :xTb 3+ (x = 1, 1.25, 1.5, and 1.75 mol%) using a conventional solid‐state reaction. The sample crystallographic structures and their room temperature photoluminescence properties were measured using X‐ray powder diffraction, excitation and emission spectra, as well as emission decay curves. X‐ray diffraction analysis showed an isostructural tetragonal structure for all the doped materials with no impurities. Several colour emissions corresponding to 5 D 4 → 7 F 6 (blue), 5 D 4 → 7 F 5 (green), 5 D 4 → 7 F 4 (orange) and 5 D 4 → 7 F 3,2,0 (red) intraconfigurational transitions were observed and investigated. These colours were dominated by the OR colours. 5 D 4 energy level lifetime was independent of Tb 3+ concentration. Various radiative and luminescence parameters, such as experimental branching ratio, radiative decay rate, and luminescence quantum efficiencies, were calculated and discussed. Chromaticity diagram calculations illustrated an orange emission for all the studied materials.