A novel near-ultraviolet (NUV) converting blue-violet Ca2−xAlMg0.5Si1.5O7:xCe3+ phosphor for white light-emitting-diodes (w-LEDs)

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 2368-2373 ◽  
Author(s):  
Cong Zhao ◽  
Da-chuan Zhu ◽  
Ming-jing Tu ◽  
Min Huang ◽  
Ling-ling Peng ◽  
...  
Keyword(s):  
Solid State ◽  
White Light ◽  
Solid State Reaction ◽  
Light Emitting Diodes ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Reaction Method ◽  
Near Ultraviolet ◽  
White Light Emitting Diodes

Ce3+ doped aluminosilicate phosphors (Ca2−xAlMg0.5Si1.5O7:xCe3+, x = 0.015–0.075) for white NUV w-LEDs were synthesized by a solid-state reaction method at 1250 °C.

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.

Photoluminescence properties of single-component white-emitting Ca9Bi(PO4)7:Ce3+,Tb3+,Mn2+phosphors for UV LEDs

2015 ◽  
Vol 3 (27) ◽  
pp. 7096-7104 ◽  
Author(s):  
Kai Li ◽  
Mengmeng Shang ◽  
Yang Zhang ◽  
Jian Fan ◽  
Hongzhou Lian ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Solid State Reaction Method ◽  
Photoluminescence Properties ◽  
Light Emitting ◽  
Reaction Method ◽  
White Light Emitting Diodes ◽  
Uv Leds ◽  
Uv Excitation

A series of Ca9Bi(PO4)7:Ce3+,Tb3+,Mn2+phosphors synthesizedviathe high-temperature solid-state reaction method can emit intense tunable color from purple-blue to red including white under UV excitation, which shows their potential application in UV-pumped white-light-emitting diodes.

An efficient green-emitting α-Ca1.65Sr0.35SiO4:Eu2+ phosphor for UV/n-UV w-LEDs: synthesis, luminescence and thermal properties

2015 ◽  
Vol 3 (24) ◽  
pp. 6341-6349 ◽  
Author(s):  
Kai Li ◽  
Ju Xu ◽  
Xuechao Cai ◽  
Jian Fan ◽  
Yang Zhang ◽  
...  
Keyword(s):  
Thermal Properties ◽  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Green Light ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Reaction Method ◽  
White Light Emitting Diodes ◽  
Uv Excitation

A series of Eu2+-doped α-Ca1.65Sr0.35SiO4 phosphors synthesized via the high-temperature solid-state reaction method can emit intense green light under UV/n-UV excitation, which show potential application in UV/n-UV-pumped white-light-emitting diodes.

Dysprosium doped di-calcium magnesium di-silicate white light emitting phosphor by solid state reaction method

2015 ◽  
Vol 26 (12) ◽  
pp. 9907-9920 ◽  
Author(s):  
Ishwar Prasad Sahu ◽  
D. P. Bisen ◽  
Nameeta Brahme ◽  
Raunak Kumar Tamrakar ◽  
Ravi Shrivastava
Keyword(s):  
Solid State ◽  
White Light ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Reaction Method ◽  
Calcium Magnesium

A New Blue-Emitting Mg2Al4Si5O18:Ce3+ Phosphor for White Light Emitting Diodes

2016 ◽  
Vol 16 (4) ◽  
pp. 3506-3510 ◽  
Author(s):  
Jian Chen ◽  
Hongyun Ma ◽  
Yangai Liu
Keyword(s):  
Thermal Stability ◽  
White Light ◽  
Light Emitting Diodes ◽  
Broad Band ◽  
Blue Emission ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Good Thermal Stability ◽  
Near Ultraviolet ◽  
White Light Emitting Diodes

A series of blue-emitting Mg2Al4Si5O18:Ce3+ phosphors were prepared via the conventional high temperature solid-state reaction method. The phase structure, photoluminescence (PL) properties, PL thermal stability, and fluorescence decay curves of the samples were investigated for the first time. Under excitation at 365 nm, the phosphor exhibited a broad band blue emission with peak at 440 nm, which was ascribed to the 4f → 5d transition of Ce3+, and the color coordinate was (0.1602, 0.0849). When the temperature increased to 150 °C, the luminescence intensity of the Mg2Al4Si5O18:0.06Ce3+ phosphor was 55.73% of the initial value at room temperature. The activation energy ΔE was calculated to be 0.25 eV, which proved the good thermal stability of the sample. The energy transfer critical distance between Ce3+ ions in Mg2Al4Si5O18 host were also calculated. The above results indicate that the Mg2Al4Si5O18:Ce3+ is a promising candidate as a blue-emitting near ultraviolet convertible phosphor for application in white light emitting diodes (WLEDs).

Effect of Eu2O3 Concentration on the Properties of Red-Light-Emitting Sr1.5Ca0.5SiO4 Fluorescent Materials

NANO ◽  
2019 ◽  
Vol 14 (09) ◽  
pp. 1950110
Author(s):  
Jing Liu ◽  
Chia-Ching Wu ◽  
Cheng-Fu Yang ◽  
Lan-Sin Liou
Keyword(s):  
Solid State ◽  
White Light ◽  
Red Light ◽  
Solid State Reaction Method ◽  
Photoluminescence Spectra ◽  
Light Emitting ◽  
Reaction Method ◽  
Fluorescent Materials ◽  
Different Temperatures ◽  
White Light Emitting Diodes

Red-light-emitting phosphors based on Sr[Formula: see text]Ca[Formula: see text]SiO4 activated by trivalent europium ions (Eu[Formula: see text] were successfully synthesized using a solid-state reaction method, and their luminescence properties were investigated. The photoluminescence spectra of Sr[Formula: see text]Ca[Formula: see text]SiO4:[Formula: see text] Eu[Formula: see text] phosphors synthesized at different temperatures and times and with different Eu[Formula: see text] concentrations revealed emission peaks at 591[Formula: see text]nm, 612[Formula: see text]nm and 655[Formula: see text]nm, which can probably be attributed to the transition of Eu[Formula: see text] ions from 5D0 to 7FJ (J = 1, 2 and 3). The emission intensities of the transitions from 5D0 to 7FJ (J = 1, 2 and 3) increased as the synthesizing temperature rose for 2[Formula: see text]h. Comparison with the relevant International Commission on Illumination diagram showed that Sr[Formula: see text]Ca[Formula: see text]SiO4:[Formula: see text] Eu[Formula: see text] phosphors synthesized at different temperatures and times and with different Eu[Formula: see text] concentrations all emitted red light, with phosphors synthesized at 1300∘C and with concentrations of 1.5[Formula: see text]at.% yielding the maximum emission intensity. These results show Sr[Formula: see text]Ca[Formula: see text]SiO4:1.5% Eu[Formula: see text] to be a noteworthy red-light-emitting phosphor candidate for white light-emitting diodes (WLEDs).

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