Multicolor up-conversion emission in tellurite glasses co-doped with rare earth ions for white LED applications

2014 ◽  
Author(s):  
Paweł Sienkiewicz ◽  
Anna Palkowska ◽  
Marcin Pietrzycki ◽  
Patryk Romanczuk ◽  
Jacek Zmojda ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Ions ◽  
Tellurite Glasses ◽  
White Led ◽  
Co Doped

scholarly journals A Review on Physical and Optical Properties of Zinc Tellurite Glasses Co-doped with different rare earth ions

2021 ◽  
Vol 33 (6) ◽  
pp. 48-56
Author(s):  
SUKHDEV BAIRAGI ◽  
◽  
GHIZAL F. ANSAR ◽  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Data Storage ◽  
Optical Data Storage ◽  
Rare Earth Ions ◽  
Optical Data ◽  
Tellurite Glasses ◽  
X Ray Diffraction ◽  
Fibre Amplifier ◽  
Co Doped

In this work we review the effect of physical and optical properties with different ion zinc contents of tellurite base glass. The physical properties of the glasses were evaluated and the change in density, molar volume and ionic packing density in these glasses indicates the effect of ZnO different content show on the glasses structure. The study of optical properties such as the optical band gap and refractive index of zinc tellurite glass were studied. Zinc Tellurite glasses doped with Er3+ ions were synthesized by varies researcher. The glasses were characterized by X- ray diffraction, optical absorption and photoluminescence spectra. The glassy nature of zinc Tellurite host glass has been confirmed through XRD measurements. The glasses doped or co-doped with rare-earth ions have generated much interest due to the possibility of several promising applications such as optical data storage, visible laser, fibre amplifier, optical communication and sensor devices

Tunable emissions via the white region from Sr2Gd8(SiO4)6O2:RE3+ (RE3+: Dy3+, Tm3+, Eu3+) phosphors

2016 ◽  
Vol 40 (7) ◽  
pp. 6214-6227 ◽  
Author(s):  
Gattupalli Manikya Rao ◽  
G. Seeta Rama Raju ◽  
Sk. Khaja Hussain ◽  
E. Pavitra ◽  
P. S. V. Subba Rao ◽  
...  
Keyword(s):  
Rare Earth ◽  
White Light ◽  
Host Lattice ◽  
Rare Earth Ions ◽  
White Region ◽  
Light Region ◽  
Trivalent Rare Earth ◽  
Co Doped

Sr2Gd8(SiO4)6O2 is an excellent host lattice for tunable emissions via the white-light region when co-doped with suitable trivalent rare-earth ions.

scholarly journals Fluoroindate glasses co-doped with Pr3+/Er3+ for near-infrared luminescence applications

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Wojciech A. Pisarski ◽  
Joanna Pisarska ◽  
Marta Kuwik ◽  
Marcin Kochanowicz ◽  
Jacek Żmojda ◽  
...  
Keyword(s):  
Rare Earth ◽  
Near Infrared ◽  
Rare Earth Ions ◽  
Luminescence Spectra ◽  
Nonradiative Relaxation ◽  
Transfer Processes ◽  
Direct Excitation ◽  
Infrared Luminescence ◽  
Doped Glass ◽  
Co Doped

AbstractFluoroindate glasses co-doped with Pr3+/Er3+ ions were synthesized and their near-infrared luminescence properties have been examined under selective excitation wavelengths. For the Pr3+/Er3+ co-doped glass samples several radiative and nonradiative relaxation channels and their mechanisms are proposed under direct excitation of Pr3+ and/or Er3+. The energy transfer processes between Pr3+ and Er3+ ions in fluoroindate glasses were identified. In particular, broadband near-infrared luminescence (FWHM = 278 nm) associated to the 1G4 → 3H5 (Pr3+), 1D2 → 1G4 (Pr3+) and 4I13/2 → 4I15/2 (Er3+) transitions of rare earth ions in fluoroindate glass is successfully observed under direct excitation at 483 nm. Near-infrared luminescence spectra and their decays for glass samples co-doped with Pr3+/Er3+ are compared to the experimental results obtained for fluoroindate glasses singly doped with rare earth ions.

Improved Infrared Emissions of Er3+-Tm3+ Co-Doped Al2O3 Thin Films: The Role of Cross Relaxation Among Rare Earth Ions

2011 ◽  
Vol 11 (12) ◽  
pp. 10673-10676
Author(s):  
Bo Zhou ◽  
Zhisong Xiao ◽  
Lu Yan ◽  
Fang Zhu ◽  
Feng Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
Rare Earth ◽  
Cross Relaxation ◽  
Rare Earth Ions ◽  
Infrared Emissions ◽  
Co Doped

Optical properties of oxide glasses with semiconductor nanoparticles co-doped with rare earth ions

2013 ◽  
Vol 588 ◽  
pp. 188-192 ◽  
Author(s):  
M.C. Neto ◽  
G.H. Silva ◽  
A.P. Carmo ◽  
A.S. Pinheiro ◽  
N.O. Dantas ◽  
...  
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Semiconductor Nanoparticles ◽  
Rare Earth Ions ◽  
Oxide Glasses ◽  
Co Doped

scholarly journals Microstructural and optical properties of rare earth ions doped TiO2 for potential white LED applications

2018 ◽  
Vol 29 (19) ◽  
pp. 16824-16835 ◽  
Author(s):  
Mohamed Zikriya ◽  
Y. F. Nadaf ◽  
C. Manjunath ◽  
C. G. Renuka
Keyword(s):  
Optical Properties ◽  
Rare Earth ◽  
Rare Earth Ions ◽  
White Led ◽  
Doped Tio2

Influence of Sintering Temperature on the Thermoluminescence Spectra of MgSO4 Doped with RE(Tm,Dy) and Mn

2014 ◽  
Vol 664 ◽  
pp. 57-61
Author(s):  
Jing Yuan Guo ◽  
Qiang Tang ◽  
Li Gao ◽  
Ting Ting Lan ◽  
Chun Xiang Zhang ◽  
...  
Keyword(s):  
Rare Earth ◽  
High Temperature ◽  
Low Temperature ◽  
Sintering Temperature ◽  
Complex Structure ◽  
Rare Earth Ions ◽  
3 Dimensional ◽  
Luminescence Process ◽  
Co Doped ◽  
The Rare Earth

In this paper, MgSO4:Dy,MgSO4:Tm and MgSO4:Mn phosphors are prepare by high temperature solid state reaction. The MgSO4:Dy or MgSO4:Tm powder are mixed and sintered with MgSO4:Mn respectively to obtain the co-doped MgSO4:Dy,Mn and MgSO4:Tm,Mn phosphors. The 3-dimensional thermoluminescence spectra of these two phosphors under different sintering temperature are measured.Results show that when the sintering temperature is below 800°C, Dy, Tm and Mn ions emissions are independent. However, when the sintering temperature was over 800°C, the emission peak of Mn becomes weaker, and so do the low temperature peaks of Dy and Tm, while the high temperature peaks of Dy and Tm become stronger. This indicated that the defect complex structure in the formation of the thermoluminescence material depends on the sintering temperature. As the sintering temperature rises, more and more Mn ions combine with the rare earth ions. Therefore, the luminescence process of the energy transfer of Mn ions to the rare earth ions can be observed and the suppression to low temperature peaks of Tm and Dy, and also shown in spectra.

Application of Nitride and Oxynitride Compounds to Various Phosphors for White LED

2008 ◽  
Vol 403 ◽  
pp. 15-18 ◽  
Author(s):  
Kyota Uheda
Keyword(s):  
Rare Earth ◽  
Thermal Quenching ◽  
Rare Earth Ions ◽  
White Led ◽  
Green Phosphor ◽  
Strong Emission ◽  
Red Phosphor ◽  
Blue Phosphor ◽  
Uv Led ◽  
Intense Emission

Multiternary nitride and oxynitride compounds doped with rare earth ions, such as Eu2+ and Ce3+ have been enthusiastically applied as various phosphors to white LED. New red and green phosphors, CaAlSiN3:Eu and Ba3Si6O12N2:Eu, have been successfully synthesized, recently. The red phosphor has intense emission around 650 nm under two different irradiations at 405 and 455 nm from blue- and near UV-LED chips, respectively; while strong emission is observed around 520 nm from the green phosphor. Both phosphors also show small thermal quenching over the temperatures up to 150 °C. In addition, both LaSi3N5:Ce and La3Si8O4N11:Ce in lanthanum silicon nitride and oxynitride were examined as candidates for a blue phosphor in white LED with near UV-LED chip.

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