Photoluminescence properties of NaGd(MoO{sub 4}){sub 2}:Eu{sup 3+} nanophosphors prepared by sol-gel method

Journal Article · Wed Sep 15 04:00:00 EDT 2010 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.05.027· OSTI ID:22207369

Liao, Jinsheng ^[1]; Huang, Huazhong; You, Hangying; Qiu, Xin; Li, Yong; Qiu, Bao; Wen, He-Rui ^[1]

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1. School of Material and Chemistry Engineering, Jiangxi University of Science and Technology, Hongqi Road 86, Ganzhou, Jiangxi 341000 (China)

NaGd(MoO{sub 4}){sub 2}:Eu{sup 3+} (hereafter NGM:Eu) phosphors have been prepared by sol-gel method. The properties of the resulting phosphors are characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), photoluminescence (PL) spectra and decay curve. The excitation spectra of NGM:Eu phosphors are mainly attributed to O {yields} Mo charge-transfer (CT) band at about 282 nm and some sharp lines of Eu{sup 3+} f-f transitions in near-UV and visible regions with two strong peaks at 395 and 465 nm, respectively. Under the 395 and 465 nm excitation, intense red emission peaked at 616 nm corresponding to {sup 5}D{sub 0} {yields} {sup 7}F{sub 2} transition of Eu{sup 3+} are observed for 35 at.% NGM:Eu phosphors as the optimal doping concentration. The luminescence properties suggest that NGM:Eu phosphor may be regarded as a potential red phosphor candidate for near-UV and blue light-emitting diodes (LEDs).

• OSTI ID: 22207369
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 9 Vol. 45; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
EUROPIUM IONS
LIGHT EMITTING DIODES
MOLYBDATES
PHOSPHORS
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
X-RAY DIFFRACTION