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8470018 
Journal Article 
Development of novel Na2Mg3Zn2Si12O30:Eu3+ red phosphor for white light emitting diodes 
Kanmani, G; Ponnusamy, V; Rajkumar, G; Jose, MT; , 
2019 
1 
Optical Materials
ISSN: 0925-3467 
ELSEVIER 
AMSTERDAM 
109350 
WOS:000496866100082 
A novel Eu3+ activated Na2Mg3Zn2Si12O30 red emitting phosphor was synthesized by solid state reaction at ambient conditions. The phase formation of prepared samples were confirmed by powder X-ray diffraction (XRD) and their luminescent properties were studied by photoluminescence(PL) spectroscopy. The surface morphology of samples were studied using SEM technique. The XRD profile of prepared samples are well matched with JCPDS card no(48-0418). The crystallite size is calculated using Scherrer's formula and found to be 0.5623 mu m. The PL emission spectra shows intense peak around 614 nm arising as a result of electric dipole transition upon 394 nm excitation. The influence of increasing europium ion concentration on photo-luminescence emission intensity were also studied. It is observed that PL intensity initially increases up to 11 mol % Eu3+ and then decreases. The concentration quenching is due to dipole-dipole interaction. Further, the commission International del'Eclairagethe (CIE) chromaticity coordinates, CCT and color purity for optimized Na2Mg3Zn2Si12O30:Eu3+ (11 mol%) are calculated for 394 rim excitation and found to be (0.6391,0.3592), 1110K and 99.6% respectively. Moreover Eu3+ activated Na2Mg3Zn2Si12O30 shows good thermal stability having activation energy 0.258eV. All the above results reveal that Na2Mg3Zn2Si12O30 doped Eu3+ can serve as potential candidates for red phosphor of WLED applications.