Efficient red phosphor double-perovskite Ca3WO6 with A-site substitution of Eu3+

被引：49

作者：

Zhao, Xin ^{[1
,2
]}

Wang, Jiajia ^{[3
]}

Fan, Li ^{[3
]}

Ding, Yufeng ^{[1
,2
]}

Li, Zhaosheng ^{[1
,2
,3
]}

Yu, Tao ^{[1
,2
]}

Zou, Zhigang ^{[1
,2
,4
]}

机构：

[1] Nanjing Univ, Natl Lab Solid State Microstruct, ERERC, Nanjing 210093, Jiangsu, Peoples R China

[2] Nanjing Univ, Dept Phys, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Coll Engn & Appl Sci, Nanjing 210093, Jiangsu, Peoples R China

[4] Nanjing Univ, Kunsan Innovat Inst, Nanjing 210093, Jiangsu, Peoples R China

来源：

DALTON TRANSACTIONS | 2013年 / 42卷 / 37期

基金：

中国国家自然科学基金;

关键词：

GENERALIZED GRADIENT APPROXIMATION; PHOTOLUMINESCENCE; SPECTROSCOPY; SYSTEM;

D O I：

10.1039/c3dt51029h

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Luminescent properties of Eu3+ activated double perovskite structure Ca3WO6 were investigated. It emits an ideal red color centered at the wavelength of 618 nm with suitable excitation from f-f transitions of Eu3+ ions (360-550 nm) matching the near ultraviolet and blue LEDs. Charge compensation effect of Li+, Na+, and K+ was investigated, and K+ proved to be the best. The co-doping ion K+ has a great effect on the lattice distortion of the host matrix Ca3WO6, which facilitates the red emission of Eu3+. The substitution site for Ca in Ca3WO6 was analyzed in detail by Raman spectra and calculation results. A-site substitution is responsible for the red emission of Eu3+ activated Ca3WO6. The integrated emission intensity of optimal Ca3WO6: K+, Eu3+ excited at 395 nm is about 3.5 times greater than that of Y2O2S:Eu3+ commercial phosphors, which makes it a promising red phosphor for white LEDs.

引用

页码：13502 / 13508

页数：7

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