Synthesis of Li+ and Eu3+ Co-doped La2MoO6 Red Phosphors by Pechini Methods and Its Photoluminescence Properties Under Near-Ultraviolet and Blue Light

doi:10.11944/j.issn.1000-0518.2015.04.140242

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (4): 447-452.DOI: 10.11944/j.issn.1000-0518.2015.04.140242

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Synthesis of Li⁺ and Eu³⁺ Co-doped La₂MoO₆ Red Phosphors by Pechini Methods and Its Photoluminescence Properties Under Near-Ultraviolet and Blue Light

WANG Meifang, ZHOU Liqun^*, LI Ling, XIA Qinghua

Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials,Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China

Received:2014-07-14 Published:2015-04-10 Online:2015-04-10
Contact: Corresponding author:ZHOU Liqun, professor; Tel/Fax:027-88663043; E-mail:zlq@hubu.edu.cn; Research interests:inorganic solid state chemistry
Supported by:
Supported by the National Natural Science Foundation of China (No.21301053), the Natural Science Fund for Creative Research Groups of Hubei Province of China(No.2014CFA015), the State College Students' Innovation Training Program of China (No; 201210512021)

Abstract

Abstract:

A series of Li⁺ and Eu³⁺ co-doped red phosphors La_1.9-_xMoO₆:0.10Eu³⁺,xLi⁺(x=0,0.10,0.20,0.25) has been successfully synthesized via Pechiini method. And the samples were investigated by the X-ray diffraction(XRD), scanning electron microscope(SEM), energy dispersive spectrometer(EDS) and photoluminescence(PL) measurements. The PL results reveal that the samples can be excited efficiently by near-ultraviolet(near-UV)(395 nm) and blue light(466 nm), and exhibit strong red emission peaks at 616 nm and 623 nm, due to the ⁵D₀→⁷F₂ electric dipole transition of Eu³⁺. These phosphors exhibit potential commercial value since they match well with white light emitting diode(W-LED) near-UV chip(370~410 nm) and blue light chip(450~470 nm). Addition of Li⁺ acting as a sensitizer strongly enhances the emission intensity of the phosphors, and the optimum concentration is x=0.20.

Key words: pechini method, La₂MoO₆: Eu³⁺, Li⁺ sensitizer, photoluminescence

CLC Number:

O614.3

WANG Meifang, ZHOU Liqun , LI Ling, XIA Qinghua. Synthesis of Li⁺ and Eu³⁺ Co-doped La₂MoO₆ Red Phosphors by Pechini Methods and Its Photoluminescence Properties Under Near-Ultraviolet and Blue Light[J]. Chinese Journal of Applied Chemistry, 2015, 32(4): 447-452.

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Synthesis of Li⁺ and Eu³⁺ Co-doped La₂MoO₆ Red Phosphors by Pechini Methods and Its Photoluminescence Properties Under Near-Ultraviolet and Blue Light

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