Preparation and Investigation of Tm3+- Doped Li3Gd3Te2O12 Blue-Emitting Phosphor

2018 ◽  
Vol 921 ◽  
pp. 111-118 ◽  
Author(s):  
Bin Deng ◽  
Chong Song Zhou ◽  
Hui Liu ◽  
Jun Chen
Keyword(s):  
Solid State ◽  
Emission Spectra ◽  
Critical Distance ◽  
Concentration Quenching ◽  
Color Purity ◽  
Doping Content ◽  
Quenching Mechanism ◽  
Light Emitting ◽  
Blue Phosphor ◽  
White Light Emitting Diodes

A novel blue-emitting phosphor, Li3Gd3Te2O12:Tm3+ for white light-emitting diodes (W-LEDs) was prepared by solid-state synthesis and its structure and luminescence properties were investigated. This phosphor shows a satisfactory blue performance (peak at 458 nm) due to the 1D2 → 3F4 transition of Tm3+ excited by 361 nm light. Investigation of Tm3+ content dependent emission spectra indicates that x = 0.03 is the optimum doping content of Tm3+ ions in the Li3Gd3Te2O12 host. The critical distance and the concentration quenching mechanism were also investigated. In particular, the color purity of as-prepared sample is close to that of the commercial blue phosphor BaMgAl10O17:Eu2+ (BAM:Eu2+). The present work suggests that the Li3Gd3Te2O12:Tm3+ phosphor is a potential blue-emitting candidate for the application in the near-UV WLEDs.

Synthesis and Luminescence Studies of Sm3+ Doped Ca9Y(PO4)7 Orange-Red-Emitting Phosphor

2016 ◽  
Vol 16 (4) ◽  
pp. 3695-3699 ◽  
Author(s):  
Jun Huang ◽  
Shuangping Yi ◽  
Yaomin Deng ◽  
Weiren Zhao ◽  
Jieqiang Xian
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Powder Diffraction ◽  
Critical Distance ◽  
Red Phosphor ◽  
Light Emitting ◽  
X Ray ◽  
Chromatic Properties ◽  
White Light Emitting Diodes ◽  
Red Emitting Phosphor

Ca9Y(PO4)7:Sm3+ phosphor was prepared via solid state reaction. The crystal structure of the phosphor was characterized by X-ray powder diffraction (XRD). The photoluminescence (PL) properties of Ca9Y(PO4)7:Sm3+ were investigated. The emission of the Ca9Y(PO4)7:Sm3+ phosphor consisted of some sharp emission peaks of Sm3+ centered at 563 nm, 600 nm, and 647 nm. The strongest one is located at 600 nm due to the 4G5/2–6H7/2 transition of Sm3+. The critical distance was calculated to be 10.5 Å. The chromatic properties of the sample Ca9Y(PO4)7:Sm3+ phosphor were located in the orange reddish region. The Ca9Y(PO4)7:Sm3+ phosphor may be potentially used as red phosphor for white light-emitting diodes (WLED).

Luminescence Properties of a Novel Blue-Emitting Phosphor NaBaBO3:Tm3+,K+

2015 ◽  
Vol 833 ◽  
pp. 39-43 ◽  
Author(s):  
Jiang Hui Zheng ◽  
Qi Jin Cheng ◽  
Li Li Ying ◽  
Li Han Cai ◽  
Chao Chen
Keyword(s):  
Dipole Interaction ◽  
Solid State Reaction Method ◽  
Concentration Quenching ◽  
Luminescence Properties ◽  
Photoluminescence Intensity ◽  
Quenching Mechanism ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Chromaticity Coordinate ◽  
White Light Emitting Diodes

A novel blue-emitting phosphor NaBaBO3doped with Tm3+was prepared using a conventional high temperature solid-state reaction method. Its crystal structure and luminescence properties were studied. Photoluminescence measurements indicate that the phosphor features a satisfactory blue performance due to the1D2→3F4transition of Tm3+with the highest photoluminescence intensity located at 460 nm excited by 359 nm near-ultraviolet (NUV) light. In addition, the concentration of Tm3+was adjusted in order to obtain the optimum emission intensity. When the Tm3+concentration in NaBaBO3is 6.0 mol% the maximum intensity can be obtained. The concentration quenching occurs when Tm3+concentration is beyond 6.0 mol% and the concentration quenching mechanism can be explained by the dipole–dipole interaction. The measured chromaticity coordinate for the NaBaBO3:Tm3+phosphor under 359 nm excitation is determined to be (0.1470, 0.1090). The present work suggests that the NaBaBO3:Tm3+,K+phosphor is a promising blue-emitting material for NUV white light-emitting diodes.

Synthesis and Luminescence Properties of Na3YSi2O7:Sm3+, Eu3+ Phosphor

2014 ◽  
Vol 633-634 ◽  
pp. 306-309 ◽  
Author(s):  
Jia Yue Sun ◽  
Liu Han ◽  
Qiu Mei Di ◽  
Qi Guang Xu
Keyword(s):  
Energy Transfer ◽  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Solid State Reaction ◽  
Emission Spectra ◽  
Potential Candidate ◽  
Photoluminescence Excitation ◽  
Light Emitting ◽  
White Light Emitting Diodes

Novel Na3YSi2O7: Sm3+, Eu3+phosphors for white light-emitting diodes were prepared by high-temperature solid-state reaction. The photoluminescence excitation and emission spectra, energy transfer from Eu2+to Tb3+are investigated in detail. The current research suggests that Na3YSi2O7: Sm3+, Eu3+phosphor is a potential candidate for application in Phosphor-converted LEDs.

scholarly journals A LUMINESCENCE PROPERTIES OF Tb, Sm CO-DOPED IN ALKALI ALUMINOBORATE GLASSES

2019 ◽  
Vol 35 (1) ◽  
Author(s):  
Ngoc Tran
Keyword(s):  
Emission Intensity ◽  
Spectroscopic Properties ◽  
Concentration Quenching ◽  
Quenching Mechanism ◽  
Light Emitting ◽  
Quenching Effect ◽  
White Light Emitting Diodes ◽  
Concentration Quenching Effect ◽  
Co Doped ◽  
Color Emission

 Spectroscopic properties of Tb3+ and Sm3+ ions co-doped in alkali aluminoborate glasses (70-x-y)B2O3.28Li2O.2Al2O3.xSm2O3.yTb2O3 (ABL:Tb,Sm) fabricated by melting method have been studied. The emission intensity of Tb3+ or Sm3+ in ABL:Tb or ABL:Sm glasses is influenced by the Tb3+ or Sm3+ doping content, and the optimum concentrations of Tb3+ and Sm3+ are 0.75 mol% and 1.0 mol%, respectively. The concentration quenching effect of Tb3+ or Sm3+ in ABL:Tb,Sm glasses occurs, and the concentration quenching mechanism is f-f interaction for either Tb3+/Sm3+. The ABL:Tb,Sm glasses can produce color emission from green to red by properly tuning the relative ratio between Tb3+ and Sm3+, the emission intensity of Tb3+/Sm3+ in ABL:Tb,Sm glasses can be enhanced by the energy transfer from Tb3+/Tb3+ and Sm3+/Sm3+. The results indicate that ABL:Tb,Sm may be a promising double emission for white light emitting diodes.

The Morphologies and Photoluminescence of Ce3+-Doped 0.5La2O3-2SrO-0.5Al2O3 Phosphors with SrF2

2016 ◽  
Vol 680 ◽  
pp. 228-232
Author(s):  
Xi Guang Gu ◽  
Ren Li Fu ◽  
Ye Tang ◽  
Fang Yang
Keyword(s):  
Solid State ◽  
White Light ◽  
Solid State Reaction ◽  
Emission Intensity ◽  
Solid State Reaction Method ◽  
Conventional Solid State Reaction ◽  
Light Emitting ◽  
Reaction Method ◽  
Reducing Atmosphere ◽  
White Light Emitting Diodes

Ce3+-doped 0.5La2O3-2SrO-0.5Al2O3 (LSA:Ce) phosphors had been successfully synthesized using a conventional solid-state reaction method under reducing atmosphere (H2/N2 =1/5). The phase, morphologies and luminescence properties of the LSA:Ce phosphors were investigated. The emission intensity of LSA:Ce phosphors was improved by the addition of SrF2 as flux, and red shift of PL spectra peak was observed in this phosphors. Research results shown that the LSA:Ce phosphors have the potential to meet the development of white light-emitting diodes.

Novel Mn4+-activated layered oxide-fluoride perovskite-type KNaMoO2F4 red phosphor for wide gamut warm white light-emitting diodes backlight

2021 ◽  
Author(s):  
Jiao Wu ◽  
Bo Wang ◽  
Zhiyuan Liu ◽  
Kang Zhang ◽  
Xiaoshuang Li ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Light Emitting Diodes ◽  
Solid State Lighting ◽  
Red Phosphor ◽  
Red Emission ◽  
Light Emitting ◽  
Warm White Light ◽  
White Light Emitting Diodes ◽  
Perovskite Type

Mn4+-activated oxidefluoride phosphors are attractive for application in wide solid-state lighting devices because of its distinct red emission at about 630 nm and the abundant storage of Mn4+ ion. However,...

Sign in / Sign up

Export Citation Format

Share Document