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.

Synthesis and luminescence properties of novel deep red emitting phosphors Li2MgGeO4:Mn4+

2015 ◽  
Vol 08 (04) ◽  
pp. 1550046 ◽  
Author(s):  
Renping Cao ◽  
Dong Ceng ◽  
Xiaoguang Yu ◽  
Siling Guo ◽  
Yufeng Wen ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Doping Concentration ◽  
Broad Band ◽  
Solid State Reaction Method ◽  
Red Phosphor ◽  
Light Emitting ◽  
Reaction Method ◽  
White Light Emitting Diodes

Novel deep red phosphor Li 2 MgGeO 4: Mn 4+ is synthesized by high temperature solid state reaction method in air. The strongest PL band peaking at ~ 671 nm in the range of 600–750 nm is due to the 2E → 4A2 transition of Mn 4+ ion and the PLE spectra shows broad band peaking at ~ 323 within the range 220–550 nm owing to the 4A2 → 4T1 transitions of Mn 4+ ion. The optimum Mn 4+ doping concentration is about 0.4 mol.%. The luminous mechanism is explained by Tanabe–Sugano diagram of Mn 4+ ion. The results indicate that red phosphor Li 2 MgGeO 4: Mn 4+ is a beneficial phosphor for use in white light-emitting-diodes (LEDs).

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.

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).

scholarly journals Luminescent properties of Eu3+-activated Gd2ZnTiO6 double perovskite red-emitting phosphors for white light-emitting diodes and field emission displays

RSC Advances ◽  
2018 ◽  
Vol 8 (20) ◽  
pp. 11207-11215 ◽  
Author(s):  
Soo Hyun Lee ◽  
Youngjin Cha ◽  
Hyosung Kim ◽  
Seungmoo Lee ◽  
Jae Su Yu
Keyword(s):  
Thermal Stability ◽  
Solid State ◽  
White Light ◽  
Double Perovskite ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Reaction Method ◽  
Field Emission Displays ◽  
White Light Emitting Diodes

We synthesized a series of double perovskite Eu3+-activated Gd2ZnTiO6 red-emitting phosphors by a solid-state reaction method and analyzed their morphology, crystallinity, luminescent properties, and thermal stability.

Crystal structure, luminescence properties, energy transfer and thermal properties of a novel color-tunable, white light-emitting phosphor Ca9−x−yCe(PO4)7:xEu2+,yMn2+

2016 ◽  
Vol 18 (41) ◽  
pp. 28661-28673 ◽  
Author(s):  
Chao Wang ◽  
Panlai Li ◽  
Zhijun Wang ◽  
Yuansheng Sun ◽  
Jinge Cheng ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Energy Transfer ◽  
Thermal Properties ◽  
High Temperature ◽  
Solid State ◽  
White Light ◽  
Solid State Reaction Method ◽  
Light Emitting ◽  
Reaction Method ◽  
Color Tunable

A series of Ca9−x−yCe(PO4)7:xEu2+,yMn2+ phosphors were synthesized by a high-temperature solid-state reaction method.

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.

scholarly journals Synthesis and luminescent properties of novel red-emitting M7Sn(PO4)6:Eu3+(M= Sr,Ba) phosphors

2018 ◽  
Vol 12 (1) ◽  
pp. 8-12
Author(s):  
Guo Feng ◽  
Weihui Jiang ◽  
Jianmin Liu ◽  
Cong Li ◽  
Quan Zhang
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Red Light ◽  
Luminescent Properties ◽  
Solid State Reaction Method ◽  
Formula Unit ◽  
Conventional Solid State Reaction ◽  
Light Emitting ◽  
Reaction Method ◽  
Uv Leds

Novel Eu3+-activated M7Sn(PO4)6 (where M = Sr, Ba) red-emitting phosphors were synthesized via conventional solid-state reaction method at 1200 ?C for 2 h. The luminescence properties of the prepared samples and quenching concentration of Sr7-xSn(PO4)6 :xEu3+ and Ba7-xSn(PO4)6 :xEu3+ were investigated. These phosphors can be efficiently excited by UV (395 nm) and visible blue (465 nm) light nicely matching the output wavelengths of the near-UV LEDs and InGaN blue LED chips and emit the red light. The critical concentrations of the Eu3+ activator were found to be 0.175mol and 0.21mol per formula unit for Sr7-xSn(PO4)6 :xEu3+ and Ba7-xSn(PO4)6 :xEu3+, respectively. The M7-xSn(PO4)6 :xEu3+ (M = Sr, Ba) phosphor may be a good candidate for light-emitting diodes application.

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