Enhanced Photoluminescence of YInGe2O7:Eu3+,Li+ Phosphor Prepared Using the Solid-State Method

2013 ◽  
Vol 684 ◽  
pp. 274-278
Author(s):  
Huang Yu Chen ◽  
Ru Yuan Yang ◽  
Shoou Jinn Chang
Keyword(s):  
Solid State ◽  
Red Light ◽  
Broad Band ◽  
Lithium Carbonate ◽  
Ion Concentration ◽  
Photoluminescence Intensity ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
Enhanced Photoluminescence ◽  
Transfer State

A Eu3+ activated YInGe2O7phosphor was synthesized by solid-state reaction and lithium carbonate was added to change the morphology and photoluminescence properties. Scanning electron microscopy showed large particle size and necking shape were obtained as the concentrations of Li+ ions increase. In the PL studies, the excitation spectrum of YInGe2O7:Eu3+ phosphors exhibited a broad band in the UV region centered at about 272 nm attributed to charge transfer state (CTS) band, which has a little shift after Li+ ion was added. As the Li+ ion concentration increased, the photoluminescence intensity of the red emission at 620 nm of Eu3+ ions was enhanced, and the optimized concentration of of added Li+ ion is 0.05. The results showed that addition of Li+ ion allows YInGe2O7:Eu3+ phosphors emitting relatively pure red light.

Charge Compensation and Enhanced Photoluminescence of Sr2SiO4:Eu3+, Li+ Phosphor

2011 ◽  
Vol 343-344 ◽  
pp. 106-111
Author(s):  
Huang Yu Chen ◽  
Shoou Jinn Chang ◽  
Min Hang Weng ◽  
Ru Yuan Yang
Keyword(s):  
Broad Band ◽  
Charge Compensation ◽  
Ion Concentration ◽  
Second Phase ◽  
Photoluminescence Intensity ◽  
Large Particle Size ◽  
Enhanced Photoluminescence ◽  
Silicate Phosphor ◽  
Strontium Silicate ◽  
Transfer State

A Eu3+activated strontium silicate phosphor was synthesized by solid-state reaction and Li+ion was added to balance the charge valence. X-ray powder diffraction analysis confirmed the formation of pure Sr2SiO4phase without second phase or phases of starting materials irrespective of the adding amount of Li+. Scanning electron microscopy showed large particle size and necking shape were obtained as the concentrations of Li+ions increase. In the PL studies, the excitation spectrum of Sr2SiO4:Eu3+,Li+phosphors exhibited a broad band in the UV region centered at about 270 nm attributed to charge transfer state (CTS) band. As the Li+ion concentration increased, the photoluminescence intensity of the red emission at 617 nm of Eu3+ions was enhanced. The results showed that Li+ion is a effective charge compensators used in Sr2SiO4:Eu3+phosphor.

scholarly journals A red emitting of manganese-doped boron carbon oxynitride (BCNO) phosphor materials: facile approach and photoluminescence properties

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 4161-4166 ◽  
Author(s):  
Bebeh W. Nuryadin ◽  
Fitri A. Permatasari ◽  
Ade Y. Nuryantini ◽  
Irfana D. Faryuni ◽  
Mikrajuddin Abdullah ◽  
...  
Keyword(s):  
Solid State ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
Red Emission ◽  
State Method ◽  
Boron Carbon

A bright red emission of manganese-doped BCNO (BCNO:Mn) phosphor was firstly synthesized by solid state method.

Photoluminescence Properties of K1-xSr4(BO3)3∶xPr3+ Phosphors Prepared by High-Temperature Solid-State Method

2017 ◽  
Vol 37 (5) ◽  
pp. 0516001
Author(s):  
马诗章 Ma Shizhang ◽  
冯文林 Feng Wenlin ◽  
彭志清 Peng Zhiqing
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
State Method

Synthesis and Luminescence Properties of Non-Doped Long Persistent Phosphors : Mg2SnO4

2009 ◽  
Vol 421-422 ◽  
pp. 352-355 ◽  
Author(s):  
Akiko Torisaka ◽  
Hiroaki Kaneko ◽  
Kentaro Nomizu ◽  
Sho Abe ◽  
Tadashi Ishigaki ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Spinel Structure ◽  
Single Phase ◽  
Broad Band ◽  
Photoluminescence Intensity ◽  
Inverse Spinel ◽  
Inverse Spinel Structure ◽  
Broad Band Emission ◽  
Band Emission

A white long persistence phosphor was synthesized in a single-phase of Mg2SnO4 which was synthesized by a solid-state reaction. This phosphor crystallized in an inverse spinel structure and showed a broad-band emission from 350nm to 700nm. The afterglow was observed upon the excitation by 254nm. A Li-doped Mg2SnO4 sample showed a higher photoluminescence intensity and a longer lifetime than the non-doped one.

Synthesis and Photoluminescence Properties of the Novel Red Phosphor Gd2MoB2O9: Eu

2011 ◽  
Vol 311-313 ◽  
pp. 1327-1331 ◽  
Author(s):  
Ling He ◽  
Wei Min Sun ◽  
Yu Tian Ding ◽  
Yu Hua Wang
Keyword(s):  
Solid State ◽  
Broad Band ◽  
Emission Peak ◽  
The Novel ◽  
Excitation Band ◽  
Photoluminescence Properties ◽  
Red Phosphor ◽  
Red Emission ◽  
Main Emission Peak ◽  
Red Luminescence

A novel phosphor, Gd2MoB2O9:Eu3+ has been synthesized by solid-state reaction and its photoluminescence in UV-VUV range are investigated. A sharp excitation band is observed in the region of 120–135 nm, which is related to the charge-transfer (CT) band of Gd3+. The broad band around 135–160 nm can be assigned to the BO3 host absorption. The broad bands around 248 nm are assigned to the CT band of Eu3+-O2-. The phosphors emit strong red luminescence centered at about 591 nm, 614 nm and 626 nm due to the5D0–7F1 and 5D0–7F2 transitions of Eu3+. The main emission peak under 254 and 147 nm excitations also shows different shifts with increasing Eu3+ concentration. This could be due to the different luminescence sites selected at high doping concentrations of Eu3+. Gd2MoB2O9:Eu3+ shows the pure red emission under both 254 and 147 nm excitations.

Photoluminescence properties of Eu3+-doped BaY2ZnO5 phosphors under near-ultraviolet irradiation

2010 ◽  
Vol 25 (5) ◽  
pp. 850-856 ◽  
Author(s):  
Chih-Hao Liang ◽  
Yee-Cheng Chang ◽  
Yee-Shin Chang ◽  
Sean Wu
Keyword(s):  
Solid State ◽  
Relaxation Mechanism ◽  
Critical Distance ◽  
Ion Concentration ◽  
Photoluminescence Intensity ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Chromaticity Coordinates ◽  
Cie Chromaticity ◽  
Ultraviolet Light Emitting Diodes

Eu3+ ion-doped BaY2ZnO5 phosphors were synthesized using a vibrating milled solid-state reaction. The phosphors exhibit a series of Eu3+ ion intra-4f excited state 5DJ (J = 3, 2, 1, 0) transitions under an excitation of 395 nm. The maximum photoluminescence intensity for 5D0 → 7F2 transition (625 nm) was obtained at a Eu3+ ion concentration of 40 mol%; quenching occurred at higher concentrations. The critical distance (Rc) for the 5DJ (J = 3, 2, 1) → 7F1 transition was 18.1 Å, which is longer than that of 6.67 Å for the 5D0 → 7F2 transition, indicating that 5DJ (J = 3, 2, 1) is easier for concentration quench because of the cross-relaxation mechanism. The red emission of the BaY1.6Eu0.4ZnO5 phosphor has CIE chromaticity coordinates of (0.66, 0.34), which are close to the NTSC system standard red chromaticity (0.67, 0.33). BaY1.6Eu0.4ZnO5 may thus be potentially applicable as a red phosphor for ultraviolet light-emitting diodes converted in solid-state lighting technology.

Synthesis, structure and photoluminescence properties of Ce3+-doped SrSc2O4: a new scandate green-emitting phosphor with blue excitation

2017 ◽  
Vol 41 (13) ◽  
pp. 5565-5571 ◽  
Author(s):  
Gen Li ◽  
Yu Fan ◽  
Haijie Guo ◽  
Yuhua Wang
Keyword(s):  
Solid State ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
Blue Excitation ◽  
State Method

Novel Ce3+-doped SrSc2O4 phosphors were synthesized via a solid state method.

Synthesis and Luminescent Properties of Ca2Li2BiV3O12:Eu3+ Phosphor

2015 ◽  
Vol 815 ◽  
pp. 309-312
Author(s):  
Si Zhu Chen ◽  
Ke Hui Qiu ◽  
Guo Yin Yan ◽  
Zi Xu Jiang ◽  
Ce Zhao
Keyword(s):  
Solid State ◽  
Broad Band ◽  
Luminescent Properties ◽  
Synthesis Temperature ◽  
Electric Dipole Transition ◽  
Main Peak ◽  
Solid State Method ◽  
Solid State Route ◽  
Good Crystallinity ◽  
Main Emission Peak

A red-emitting phosphor, Eu3+ activated Ca2Li2BiV3O12 was synthesized via combining combustion with solid state method and characterized by X-ray powder diffraction (XRD) and fluorescence spectrophotometer. The influence of synthesis temperature and the concentration of Eu3+ ions, on phase composition and luminescent properties of the synthesized samples was investigated systematically. The results showed that the Ca2Li2BiV3O12:Eu3+ phosphor with high phase purity and good crystallinity can be obtained by this citric acid - assisted sol combustion-solid state route at the synthesis temperature from 600°C to 700°C. The excitation spectrum of Ca2Li2BiV3O12:Eu3+ was composed of a broad band from 200 nm to 385 nm and a number of sharp small peaks extending from 390 nm to 480 nm, and the main peak was at 277 nm. The main emission peak was at 612 nm due to the electric dipole transition of 5D0 → 7F2 of Eu3+, which results in a red emitting. The sample prepared at T=680 °C, Eu3+ mol%=15 mol% has the highest emission intensity in this work.

A novel, warm, white light-emitting phosphor Ca2PO4Cl:Eu2+, Mn2+ for white LEDs

2014 ◽  
Vol 2 (37) ◽  
pp. 7823-7829 ◽  
Author(s):  
Panlai Li ◽  
Zhijun Wang ◽  
Zhiping Yang ◽  
Qinglin Guo
Keyword(s):  
Solid State ◽  
White Light ◽  
Single Phase ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
Light Emitting ◽  
White Leds ◽  
Warm White Light ◽  
State Method

A series of single-phase phosphors, Ca2PO4Cl:Eu2+, Mn2+, have been successfully synthesized by a solid-state method and their photoluminescence properties have been investigated.

Sign in / Sign up

Export Citation Format

Share Document