title: Photoluminescence properties and thermal stability of blue-emitting Ba5-xCl(PO4)3:xEu2+(0.004≤x≤0.016) phosphors.
abstract: A series of blue-emitting Ba5-xCl(PO4)3:xEu2+(0.004≤x≤0.016) phosphors were synthesized by conventional high-temperature solid state reaction. The structure and photoluminescence (PL) properties of the phosphors were investigated. The as-prepared phosphors exhibit broad excitation band ranging from 250 to 420nm, and strong asymmetric blue emission band peaking at 436nm. The optimum concentration of Eu2+in the Ba5Cl(PO4)3:Eu2+phosphor is x=0.01, and the concentration quenching mechanism is verified to be the combined actions of dipole-dipole interaction and radiation re-absorption mechanism. The thermal stability of Ba5Cl(PO4)3:Eu2+was evaluated by temperature-dependent PL spectra. Compared with that of commercial BaMgAl10O17:Eu2+(BAM) phosphor, the Ba5-xCl(PO4)3:xEu2+phosphors exhibit similarly excellent thermal quenching property. In addition, the CIE chromaticity coordinates of Ba5-xCl(PO4)3:xEu2+(0.004≤x≤0.016) were calculated to evaluate the color quality. All the results indicate that Ba5Cl(PO4)3:Eu2+is a promising candidate phosphor for near-ultraviolet (n-UV) pumped LED.
authors: State Key Laboratory Base of Eco-chemical Engineering, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
authors: Jie
authors: J
authors: Liu
authors: State Key Laboratory Base of Eco-chemical Engineering, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
authors: Zhi-Ming
authors: ZM
authors: Zhang
authors: State Key Laboratory Base of Eco-chemical Engineering, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China. Electronic address: wuzhan_chao@163.com.
authors: Zhan-Chao
authors: ZC
authors: Wu
authors: State Key Laboratory Base of Eco-chemical Engineering, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
authors: Fang-Fang
authors: FF
authors: Wang
authors: State Key Laboratory Base of Eco-chemical Engineering, College of Sino-German Science and Technology, Qingdao University of Science and Technology, Qingdao 266042, PR China.
authors: Zhen-Jiang
authors: ZJ
authors: Li
authors: State Key Laboratory Base of Eco-chemical Engineering, Laboratory of Inorganic Synthesis and Applied Chemistry, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, PR China.
authors: Shao-Ping
authors: SP
authors: Kuang
authors: School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China. Electronic address: ceswmm@sysu.edu.cn.
authors: Ming-Mei
authors: MM
authors: Wu
keywords: Blue emission; LED; Phosphate; Photoluminescence properties; Thermal stability