Highly thermally stable Cr3+ and Yb3+ codoped Gd2GaSbO7 phosphors for broadband near-infrared applications

2021 ◽  
Author(s):  
xiudi wu ◽  
shuang zhao ◽  
Liang Zhang ◽  
Langping Dong ◽  
Yonghui Xu ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Emission Band ◽  
Near Infrared ◽  
Thermally Stable ◽  
Nir Emission

Abstract：Gd2GaSbO7:Cr3+,Yb3+ phosphors with efficient broadband NIR emission were prepared by solid-state reaction. Under the excitation of 448 nm, Gd2GaSbO7:Cr3+ (GGS:Cr3+) phosphor exhibits a broadband NIR emission band centered at approximately...

Broadband near-infrared BaMSi3O9:Cr3+ (M = Zr, Sn, Hf) phosphors for light-emitting diode applications

2021 ◽  
Author(s):  
Yan Zhang ◽  
Yanjie Liang ◽  
Shihai Miao ◽  
Dongxun Chen ◽  
Shao Yan ◽  
...  
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Light Emitting Diode ◽  
Solid State Reaction Method ◽  
Luminescence Properties ◽  
Light Emitting ◽  
Reaction Method ◽  
Simple Solid State Reaction

A series of Cr3+-doped BaMSi3O9 (M = Zr, Sn, Hf) near-infrared emitting phosphors with tunable luminescence properties have been successfully synthesized by using a simple solid-state reaction method. The developed...

A Cooperative Afterglow Enhancement in Second Biological Window of Na2CaSn2Ge3O12 with Co-doping of Pr3+-Yb3+

2021 ◽  
Author(s):  
Xiuping Gao ◽  
Tao Liu ◽  
Xiaohui Jiang ◽  
Kai Huang ◽  
Runlin Liu ◽  
...  
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Co Doping

A novel near-infrared persistent luminescent phosphor Na2CaSn2Ge3O12 (NCSGO) doped with Ho3+, Er3+, Tm3+ and Yb3+ was synthesized by high-temperature solid-state reaction. The afterglow emission bands located at 1553nm, 801nm and...

Synthesis of an efficient lanthanide doped glass-ceramic based near-infrared photocatalyst by a completely waterless solid-state reaction method

2019 ◽  
Vol 48 (27) ◽  
pp. 9925-9929 ◽  
Author(s):  
Guobiao Li ◽  
Shouqiang Huang ◽  
Yanwen Shen ◽  
Ziyang Lou ◽  
Haiping Yuan ◽  
...  
Keyword(s):  
Solid State ◽  
Glass Ceramic ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Solid State Reaction Method ◽  
Optically Active ◽  
Ceramic Powders ◽  
Reaction Method ◽  
Doped Glass ◽  
Superficial Coating

A novel efficient near-infrared photocatalyst of glass-ceramic/TiO2 was synthesized by a completely waterless solid-state reaction method, with optically active center CaF2 in glass-ceramic powders and anatase-TiO2 as the superficial coating.

Synthesis and Characterization of Yellow Pigments Fabricated by Sol-Gel and Solid-State Reaction Routes

2015 ◽  
Vol 655 ◽  
pp. 212-215
Author(s):  
Xin Qiao Zhao ◽  
Yu Jun Zhang ◽  
Xiao Yu Zhang
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Sol Gel ◽  
Nir Spectroscopy ◽  
Near Infrared Reflectance ◽  
Light Yellow ◽  
Average Grain Size ◽  
Light Yellow Color ◽  
Reaction Routes

Novel environment-friendly near-infrared reflective Y5.2Nd0.8MoO12+σ pigments were fabricated by sol-gel and solid-state reaction routes, and the properties of both pigments were compared. The pigments were characterized by XRD, SEM, CIE-L*a*b* color-measurements, and UV-vis-NIR spectroscopy. The results show that pigments obtained by sol-gel routes crystallize completely at 900 °C, much lower than 1300 °C of solid-state reaction routes. Nano-size pigments fabricated by sol-gel routes possess an average grain size of ~ 50 nm, largely finer than 3 μm of solid-state reaction ones. Moreover, the sol-gel processed pigments show a higher near-infrared reflectance than solid-state reaction ones, which are 98.3 % and 91.7 %, respectively, but with a slightly light yellow color hue.

The Effects of Calcium Fluoride Addition on Crystallization Characteristics of Hydroxyapatite-Zirconia Composite

2011 ◽  
Vol 197-198 ◽  
pp. 74-78
Author(s):  
Li Li Wang ◽  
Xiu Feng Wang ◽  
Jian Feng Zhu ◽  
Cheng Long Yu
Keyword(s):  
Solid State ◽  
Solid Solutions ◽  
Tricalcium Phosphate ◽  
Solid State Reaction ◽  
Calcium Fluoride ◽  
Composite Powder ◽  
Thermally Stable ◽  
Negligible Amount ◽  
Sintered Temperature ◽  
Fluoride Addition

Hydroxyapatite (HA) doped with 3% Yttria-stabilized 20vol%m-ZrO2composite were synthesized by solid state reaction between tricalcium phosphate (TCP) and Ca(OH)2at various temperature(1000 to 1200°C) for 3h with adding 5~20wt% calcium fluoride (CaF2), respectively. The effects of various amount of CaF2on crystallization characteristics of HA-20vol%ZrO2composite were investigated in details. The results show that when small amount of CaF2was added, the reactions of HA with CaF2occurs, which leads to the formation of fluorapatite (FA). With the increasing of the amount of CaF2, the decomposition of HA to β-TCP decreases gradually and the CaZrO3peaks disappear, while t-ZrO2increases because of the formation of thermally stable FHA solid solutions. When the sintered temperature is above 1100°C and the addition of CaF2is about 10wt%, the main phases are FHA and t-ZrO2with a negligible amount of Ca5P8, which suppress the reaction between HA and ZrO2. From SEM, it can be seen that with 10wt% of CaF2addition, the morphology of the composite powder is a mixture of spherical ZrO2particles embedded within agglomerated HA shaped like a small rod.

Enhanced energy transfer in Nd3+/Cr3+ co-doped Ca3Ga2Ge3O12 phosphors with near-infrared and long-lasting luminescence properties

2016 ◽  
Vol 4 (16) ◽  
pp. 3396-3402 ◽  
Author(s):  
Huihong Lin ◽  
Ting Yu ◽  
Gongxun Bai ◽  
Ming-Kiu Tsang ◽  
Qinyuan Zhang ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Solid State ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Luminescence Properties ◽  
Conventional Solid State Reaction ◽  
Co Doped

The phosphors of Ca3Ga2Ge3O12 (CGGG) co-doped with Nd3+ and Cr3+ ions were synthesized using conventional solid-state reaction techniques.

Quantum Cutting Downconversion in Tb3+,Yb3+ Codoped Sr3AlO4F Phosphor

2013 ◽  
Vol 683 ◽  
pp. 172-175 ◽  
Author(s):  
Jia Yue Sun ◽  
Yi Ning Sun ◽  
Jun Hui Zeng ◽  
Ji Cheng Zhu ◽  
Hai Yan Du
Keyword(s):  
Energy Transfer ◽  
High Temperature ◽  
Solid State ◽  
Quantum Efficiency ◽  
Solid State Reaction ◽  
Near Infrared ◽  
Luminescence Spectra ◽  
Promising Candidate ◽  
Quantum Cutting ◽  
Co Doped

A near Infrared (NIR) quantum cutting (QC) Sr3AlO4F:Tb3+,Yb3+phosphor was synthesized by the conventional high temperature solid-state reaction. The luminescence spectra both in visible (VIS) and NIR regions and decay lifetime curves of Tb3+have been measured to prove energy transfer (ET) from Tb3+to Yb3+. Quantum efficiency (QE) related to Yb3+concentration was calculated and the highest QE was found to be 135% hen Yb3+doped concentration at 20%. The present Tb3+and Yb3+co-doped Sr3AlO4F phosphor may be a promising candidate to modify the spectral of the solar light.

Synthesis Improvement of Yb3+-Activated SnO2 Nanocrystals

2007 ◽  
Vol 128 ◽  
pp. 31-40 ◽  
Author(s):  
Emanuela Callone ◽  
Giovanni Carturan ◽  
Yoann Jestin ◽  
Maurizio Ferrari
Keyword(s):  
Solid State ◽  
Emission Band ◽  
Solid State Nmr ◽  
Photoluminescence Spectroscopy ◽  
Absorption Peak ◽  
Thermally Stable ◽  
Preliminary Assessment ◽  
Homogeneous Dispersion ◽  
Sno2 Nanocrystals

Yb3+ doped SnO2 nanocrystals were synthesized, using the hydrolytic route in the presence of starch as the size stabilizer. Starting from salt precursors, the nanopowders obtained with various Yb3+ loads are thermally stable up to 600 °C. They were characterized by XRD, solid state NMR, TEM, ICP and TG-MS techniques. The nanocrystal Cassiterite structure, with a size of a few nanometers (<6 nm), was identified by XRD, NMR and Raman measurements confirming a homogeneous dispersion of Yb3+ ions in the lattice. The preliminary assessment of the spectroscopic features of nanocrystals was performed by absorption and photoluminescence spectroscopy. The typical Yb3+ absorption peak, centred at 977 nm, and an intense 2F5/2→ 2F7/2 Yb3+ emission band were observed.

scholarly journals Near infrared-emitting tris-bidentate Os(ii) phosphors: control of excited state characteristics and fabrication of OLEDs

2015 ◽  
Vol 3 (19) ◽  
pp. 4910-4920 ◽  
Author(s):  
Jia-Ling Liao ◽  
Yun Chi ◽  
Chia-Chi Yeh ◽  
Hao-Che Kao ◽  
Chih-Hao Chang ◽  
...  
Keyword(s):  
Excited State ◽  
Solid State ◽  
Near Infrared ◽  
Nir Emission

Os(ii) complexes bearing chromophoric 1,10-phenanthroline, diphosphine and bipyrazolate ancillaries display efficient NIR emission ranging from 717 nm to 779 nm in the solid state at RT.

Efficient and thermally stable blue-emitting Ce3+ doped LaAl(Si6−zAlz)(N10−zOz) (JEM:Ce) phosphors for white LEDs

2017 ◽  
Vol 5 (32) ◽  
pp. 8295-8300 ◽  
Author(s):  
Chun-Yun Wang ◽  
Otmar Melvin ten Kate ◽  
Takashi Takeda ◽  
Naoto Hirosaki
Keyword(s):  
High Temperature ◽  
Solid State ◽  
Solid State Reaction ◽  
Solid State Reaction Method ◽  
Gas Pressure ◽  
Thermally Stable ◽  
Reaction Method ◽  
White Leds

La2O3, LaN, Si3N4, AlN and CeO2 have been used as starting materials to synthesize Ce doped LaAl(Si6−zAlz)(N10−zOz) (z ≈ 1, termed the JEM phase) phosphors, via a solid-state reaction method in a gas pressure furnace at a high temperature.

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