Sol-gel synthesis, structure and photoluminescence properties of nanocrystalline Lu{sub 2}MoO{sub 6}:Eu

Journal Article · Thu Sep 15 04:00:00 EDT 2011 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2011.05.020· OSTI ID:22212231

Li, Huaiyong; Yang, Hyun Kyoung ^[1]; Jang, Kiwan; Lee, Ho Sueb ^[2]; Yi, Soung Soo ^[3]

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1. Department of Physics, Pukyong National University, 599-1 Nam-Gu, Daeyeon 3 Dong, Busan 608-737 (Korea, Republic of)
2. Department of Physics, Changwon National University, Changwon 641-773 (Korea, Republic of)
3. Department of Electronic Material Engineering, Silla University, Busan 617-736 (Korea, Republic of)

Highlights: {yields} Monoclinic-structural Lu{sub 2}MoO{sub 6} has strong absorption of near-UV light. {yields} The absorbed energy can be transferred from MoO{sub 5} groups to doped Eu{sup 3+} and luminescence. {yields} The absorption edge and the peak of the MoO{sub 5} excitation band shift in reverse ways. {yields} The decline of the crystallinity and the introduced defect respond for the variation. -- Abstract: In this paper, we reported the obtention of Eu{sup 3+} ion doped Lu{sub 2}MoO{sub 6} powders synthesized by a sol-gel method, and followed by annealing at different temperatures. The structure and photoluminescence properties of these powders were investigated. The X-ray diffraction pattern suggests that Lu{sub 2}MoO{sub 6} powder has a monoclinic structure. It was observed that the UV-visible and photoluminescence spectra of Lu{sub 2}MoO{sub 6}:Eu nanocrystallines varied systematically with the calcination temperature. The near-UV absorption edge shifts to long wavelength direction with the decreasing of the calcination temperature, while the peak of MoO{sub 5} excitation band shifts in an opposite way. The decline of the crystallinity and the introduced lattice defect were considered to respond for these variations. Additionally, due to the efficient red light emission under near-UV light excitation, the powder can be a candidate as red phosphor for white-light-emitting diodes.

• OSTI ID: 22212231
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 9 Vol. 46; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
CALCINATION
CRYSTAL DEFECTS
CRYSTALS
DOPED MATERIALS
EUROPIUM IONS
EXCITATION
LIGHT EMITTING DIODES
MONOCLINIC LATTICES
NANOSTRUCTURES
PHOTOLUMINESCENCE
POWDERS
SOL-GEL PROCESS
SYNTHESIS
X-RAY DIFFRACTION