Output ID:  1000003614329
Category:  期刊论文
Journal Article Title:  :  Preparation, characterization and photoluminescence properties of BaB2O4: Eu3+ red phosphor
Abstract:  A new red emitting BaB2O4: Eu3+ phosphor was synthesized by solid-state reaction method. X-ray powder diffraction (XRD) analysis confirmed the monoclinic formation of BaB2O4. Field-emission scanning electron-microscopy (FE-SEM) observation indicated that the microstructure of the phosphor consisted of irregular grains with heavy agglomerate phenomena. Upon excitation with 394 nm light, the BaB2O4: Eu3+ phosphor shows bright red emissions with the highest photoluminescence (PL) intensity at 611 nm due to 5D0 → 7F2 transitions of Eu3+ ions. The CIE chromaticity coordinates are calculated from the emission spectrum to be x = 0.64, y = 0.35. The effects of the Eu3+ concentration on the PL were investigated. The results showed that the optimum concentration of Eu3+ in BaB2O4 host is 6 mol% and the dipole–dipole interaction plays the major role in the mechanism of concentration quenching of Eu3+ in BaB2O4: Eu3+ phosphor. The effect of charge compensation on the emission intensity was also studied. The charge compensations of Li+, Na+ and K+ anions all increased the luminescent intensity of BaB2O4: Eu3+. K+ anion gave the best improvement to enhance the intensity of the emission, indicating K+ is the optimal charge compensator. All properties show that this phosphor could serve as a potential candidate for application as a red phosphor for NUV chip...
Keywords:  Red-emitting phosphor; XRD; Photoluminescence; Concentration quenching; Charge compensation 
Authors:  Liu Jie; Wang Xiang-De; *Wu Zhan-Chao; *Kuang Shao-Ping
Journal Name:  Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 
Status:  Accepted
Indexed by:  scie,other
DOI:  10.1016/j.saa.2011.05.009
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Last update date:  2016/03/02 03:28:05 
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