Effect of doping charge compensator Li+ on structure and luminescent properties of ZnWO4: Eu3+, Dy3+ phosphor

Optik ◽  
2019 ◽  
Vol 194 ◽  
pp. 163056 ◽  
Author(s):  
Yongqing Zhai ◽  
Qinglin Sun ◽  
Longtai Jiang ◽  
Weiao Wang ◽  
Xiangyun Chen ◽  
...  
Keyword(s):  
Luminescent Properties ◽  
Charge Compensator ◽  
Effect Of Doping

Effects of Charge Compensators on Structure and Luminescent Properties of Microwave Synthesized CaMoO4:Eu3+ Red Phosphors

2017 ◽  
Vol 727 ◽  
pp. 592-597
Author(s):  
Ying Han ◽  
Zhi Lin Li ◽  
Wan Zhang ◽  
Yan Jie Yin ◽  
Yan Mei Li ◽  
...  
Keyword(s):  
Broad Band ◽  
Luminescent Properties ◽  
Emission Peak ◽  
Luminous Intensity ◽  
Main Peak ◽  
Doping Amount ◽  
X Ray ◽  
Red Phosphors ◽  
Charge Compensator ◽  
Pure Phase

Red phosphors CaMoO4:Eu3+ were synthesized by microwave method with MnO2 as microwave absorbent. The phase structure and luminescent properties of the as-synthesized phosphors were investigated by X-ray powder diffraction and Fluorescence spectrophotometer. The results show that when the reaction time was 40 min, microwave power was medium-high fire (~560 W), we got the tetragonal CaMoO4:Eu3+ pure phase. The excitation spectrum of CaMoO4:Eu3+ was composed by a broad band between 200 nm and 350 nm and a series of peaks from 350 nm to 500 nm. The main peak was at 305 nm. The emission spectrum was composed of a series of peaks in the range of 550~750 nm and the main peak was at 617 nm due to the 5D0→7F2 transition of Eu3+. Doping charge compensator Li+, Na+ or K+ could improve the luminous intensity of the sample. When the doping amount of Li+, Na+ or K+ were 8 mol%, the luminous intensity of the sample reached the maximum. The intensity of the emission peak at 617 nm was 4.04, 3.42, 3.48 times of sample without doping charge compensator.

Effect of alkali charge compensator on luminescent properties in Eu3+ doped β-dicalcium silicate

Optik ◽  
2019 ◽  
Vol 178 ◽  
pp. 1255-1263
Author(s):  
M.S. Upendra Rao ◽  
Chikka Hanumantharayappa ◽  
K.P. Ramesh ◽  
D. Haranath
Keyword(s):  
Luminescent Properties ◽  
Dicalcium Silicate ◽  
Charge Compensator

The effect of doping La3+ on structure and luminescent properties of Sr2SiO4:Eu2+ phosphors

2015 ◽  
Vol 41 (10) ◽  
pp. 13341-13347 ◽  
Author(s):  
Cong Zhao ◽  
Da-chuan Zhu ◽  
Yong Pu ◽  
Ling-ling Peng ◽  
Tao Han ◽  
...  
Keyword(s):  
Luminescent Properties ◽  
Effect Of Doping

Research on the Effect of Doping Ca Ion and Organic Solvent on the Luminescent Intensity of Tb Complex Material

2011 ◽  
Vol 321 ◽  
pp. 96-99
Author(s):  
Li Hua Wang
Keyword(s):  
Infrared Spectrum ◽  
Organic Solvent ◽  
Fluorescence Intensity ◽  
Ternary Complex ◽  
Luminescent Properties ◽  
Luminescent Intensity ◽  
Luminescent Material ◽  
Complex Material ◽  
Effect Of Solvent ◽  
Effect Of Doping

A Tb (III) ternary complex luminescent material has been synthesized and characterized by infrared spectrum. The luminescent properties of Tb (III) luminescent material were studied in solid and in ethanol, methanol and DMSO solutions. The effect of solvent factors and the doping different concentration of Ca (II) ion on the fluorescence intensity of Tb (III) complex luminescent material were tested. The results show that both the solvents and the doping different concentration of Ca (II) ion could quench the luminescent intensity of Tb (III) complex luminescent material.

Luminescent Properties of a Novel Red-Emitting Phosphor Ca1.95P2O7:0.05Eu3+, B3+, M+ (M=Li, Na, K) for White Light-Emitting Diodes

2013 ◽  
Vol 634-638 ◽  
pp. 2481-2484 ◽  
Author(s):  
Mi Fang Yan ◽  
Li Hong Xue ◽  
You Wei Yan
Keyword(s):  
Boric Acid ◽  
Synthesis Method ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Emission Peak ◽  
Molar Ratio ◽  
Light Emitting ◽  
Charge Compensator ◽  
White Light Emitting Diodes ◽  
Red Emitting Phosphor

A series of Ca1.95P2O7:0.05Eu3+, B3+, M+ (M=Li, Na, K) phosphors were prepared by combustion synthesis method using boric acid as flux and M+ as charge compensator. The crystal structure and luminescent properties were investigated. The emission spectra show that the most intensive emission peak is located at 612nm, corresponding to the 5D0-7F2 transition of Eu3+. The phosphors can be efficiently excited by 394nm and 464nm light, which are matched well with the emission wavelength of near UV and blue light-emitting chips, respectively. The results show that boric acid is effective in improving the luminescence intensity, and the optimum molar ratio of boric acid to the pyrophosphate is 0.09. The relative emission intensities of Eu3+ (5D0-7F2) in Ca2P2O7:Eu3+ phosphors with M+ (M=Li, Na, K) introduced as charge compensator are significantly enhanced, and the phosphor added with Na+ show the strongest emission.

scholarly journals Concentration Dependence of Luminescent Properties forSr2TiO4:Eu3+Red Phosphor and Its Charge Compensation

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Zhou Lu ◽  
Le Zhang ◽  
Lixi Wang ◽  
Qitu Zhang
Keyword(s):  
Red Light ◽  
Luminescent Properties ◽  
Charge Compensation ◽  
Red Phosphor ◽  
White Leds ◽  
Structure Damage ◽  
Charge Compensator ◽  
Composition Structure ◽  
Cie Chromaticity ◽  
Light Color

Sr2TiO4:Eu3+phosphors using M+(M = Li+, Na+, and K+) as charge compensators were prepared by the solid-state reaction. The powders were investigated by powder X-ray diffraction (XRD) and photoluminescence spectra (PL) to study the phase composition, structure, and luminescent properties. The results showed that Li+ion was the best charge compensator. The phase was Sr2TiO4when the doping concentration was small (x≤10.0%). Whenxreached 15.0%, the phase turned into Sr3Ti3O7because of the structure damage. The phosphor could be effectively excited by ultraviolet (365, 395 nm) and blue light (465 nm), and thenitemitted intense red light that peaked at around 620 nm (5D0→7F2). In addition, the emission of 700 nm (5D0→7F4) enhanced the red light color purity. The CIE chromaticity coordinates of samples with the higher red emission were between (0.650, 0.344) and (0.635, 0.352). Doped layered titanate Sr2TiO4:Eu3+is a promising candidate red phosphor for white LEDs which can be suited for both near-UV LED chip and blue LED chip.

Effect of doping Gd3+ on crystal structure and luminescent properties of Sr2SiO4:Eu2+ phosphor

2015 ◽  
Vol 33 (7) ◽  
pp. 693-699 ◽  
Author(s):  
Cong ZHAO ◽  
Dachuan ZHU ◽  
Wei GAO ◽  
Tao HAN ◽  
Lingling PENG ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Luminescent Properties ◽  
Effect Of Doping

Enhancement of the red emission in Ba3(PO4)2:Eu3+ by addition of charge compensator Na+

2018 ◽  
Vol 32 (34n36) ◽  
pp. 1840063 ◽  
Author(s):  
Dandan Zhang ◽  
Huaxing Xiao ◽  
Wei Jiang ◽  
Xia Cao ◽  
Lu Huang ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Red Light ◽  
Emission Spectra ◽  
Luminescent Properties ◽  
Host Crystal ◽  
Red Emission ◽  
Uv Led ◽  
Charge Compensator ◽  
Red Emitting Phosphor

Ba[Formula: see text](PO4)2:0.04Eu[Formula: see text] (S1) and Ba[Formula: see text]Na[Formula: see text](PO4)2:0.04Eu[Formula: see text] (S2) were prepared by solid state reaction. The phases and luminescent properties of the obtained phosphors were characterized. The results demonstrate that the phosphors particles emit an intensive red light under excitation at 395 nm. Both phosphors can be efficiently excited by ultraviolet and blue light, and the emission spectra mainly consist of two emission peaks at 591 nm and 611 nm. The crystallographic sites of Eu[Formula: see text] ions in Ba3(PO4)2 host were discussed on the base of emission spectra and its host crystal structure. By introducing the charge compensator Na[Formula: see text] into the S1 phosphor, its emission intensity was enhanced, indicating that S2 could serve as a promising red-emitting phosphor for UV LED applications.

Sign in / Sign up

Export Citation Format

Share Document