Premium
Study of luminescence properties of dysprosium‐doped CaAl 12 O 19 phosphor for white light‐emitting diodes
Author(s) -
Dev Kapil,
Selot Anupam,
Nair Govind B.,
Barai Vijay L.,
Singh Nitu,
Haque Fozia Z.,
Aynyas M.,
Dhoble S. J.
Publication year - 2019
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.3675
Subject(s) - phosphor , chromaticity , analytical chemistry (journal) , photoluminescence , materials science , fourier transform infrared spectroscopy , luminescence , dysprosium , scanning electron microscope , doping , color temperature , emission spectrum , spectroscopy , optics , chemistry , optoelectronics , spectral line , physics , inorganic chemistry , chromatography , quantum mechanics , astronomy , composite material
Dy 3+ ‐doped CaAl 12 O 19 phosphors were synthesized utilizing a combustion method. Crystal structure and morphological examinations were performed respectively using X‐ray diffraction (XRD) and scanning electron microscopy (SEM) techniques to identify the phase and morphology of the synthesized samples. Fourier transform infrared spectroscopy (FTIR) estimations were carried out using the KBr method. Photoluminescence properties (excitation and emission) were recorded at room temperature. CaAl 12 O 19 :Dy 3+ phosphor showed two emission peaks respectively under a 350‐nm excitation wavelength, centered at 477 nm and 573 nm. Dipole–dipole interaction via nonradiative energy shifting has been considered as the major cause of concentration quenching when Dy 3+ concentration was more than 3 mol%. The CIE chromaticity coordinates positioned at (0.3185, 0.3580) for the CaAl 12 O 19 :0.03Dy 3+ phosphor had a correlated color temperature (CCT) of 6057 K, which is situated in the cool white area. Existing results point out that the CaAl 12 O 19 :0.03Dy 3+ phosphor could be a favorable candidate for use in white light‐emitting diodes (WLEDs).