scholarly journals Enhanced and tunable white light emission from Ag nanoclusters and Eu3+-co-doped CaBAl glasses

RSC Advances ◽  
2018 ◽  
Vol 8 (61) ◽  
pp. 35263-35270 ◽  
Author(s):  
Marcelo Sandrini ◽  
Robson Ferrari Muniz ◽  
Vitor Santaella Zanuto ◽  
Franciana Pedrochi ◽  
Yannick Guyot ◽  
...  
Keyword(s):  
Heat Treatment ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Luminescence Properties ◽  
Ag Nanoclusters ◽  
Co Doped

In this work, Ag:Eu-co-doped calcium boroaluminate glasses were prepared and submitted to further heat treatment to form different Ag species. The optical and luminescence properties were investigated in terms of heat treatment times.

scholarly journals High Thermal Stability Apatite Phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ for White Light Emission: Synthesis, Structure, Luminescence Properties and Energy Transfer

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Ning Liu ◽  
Lefu Mei ◽  
Libing Liao ◽  
Jie Fu ◽  
Dan Yang
Keyword(s):  
Thermal Stability ◽  
Energy Transfer ◽  
White Light ◽  
Single Phase ◽  
Light Emission ◽  
High Thermal Stability ◽  
White Light Emission ◽  
Luminescence Properties ◽  
Potential Candidate ◽  
Co Doped

Abstract What ideal w-LED phosphors always aim to do is to achieve a single phase near-sunlight emission phosphor simultaneously with both high luminescence efficiency and high thermal stability at operation temperature. And It is well known that apatite compound phosphors are one of the most promising optical materials to realize those above because of their unique structure enhanced luminescence properties and thermal stability. Here, we synthesized a co-doped single phase apatite phosphors Ca2La8(SiO4)6O2:Dy3+/Sm3+ (CLSO:Dy3+/Sm3+) for white light emission, which was provided with excellent thermal stability and of which luminescence intensity at 150 °C still was 92 percentage of that at room temperature. Moreover, X-ray diffraction technique, Fourier transform infrared spectroscopy, scanning electron microscope were employed to characterization of phase structure and morphology, and consequently pure apatite structure and gravel-like morphology of phosphors were proved. Analysis of photoluminescence spectra indicated that concentration quenching effect exist in single-doped CLSO:Dy3+ phosphors owing to dipole-dipole interaction between Dy3+ ions. It is revealed that maybe exist Dy3+ ↔ Sm3+ bilateral non-radiative energy transfer processes in Dy3+/Sm3+ co-doped CLSO system by PL spectra and decay curves. And variation of Sm3+ ion concentration can control color emission, namely CIE chromaticity coordinates and correlated color temperature, finally to achieve white light emission (0.309,0.309) with CCT 6848 K, able to be a potential candidate for commercial lighting applications.

Tunable White-Light Emission of Co2+ and Mn2+ Co-Doped ZnS Nanoparticles by Energy Transfer between Dopant Ions

2020 ◽  
Vol 124 (6) ◽  
pp. 3857-3866 ◽  
Author(s):  
G. Saavedra-Rodriguez ◽  
U. Pal ◽  
R. Sánchez-Zeferino ◽  
M. E. Álvarez-Ramos
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Zns Nanoparticles ◽  
Co Doped

Tunable luminescence from Sm3+, Ce3+ codoped Al2O3–La2O3–SiO2 glasses for white light emission

2009 ◽  
Vol 24 (5) ◽  
pp. 1730-1734 ◽  
Author(s):  
Hucheng Yang ◽  
G. Lakshminarayana ◽  
Yu Teng ◽  
Shifeng Zhou ◽  
Jianrong Qiu
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Spectral Properties ◽  
Light Emission ◽  
Light Emitting Diode ◽  
Fluorescence Decay ◽  
White Light Emission ◽  
Luminescence Properties ◽  
Light Emitting ◽  
Luminescence Efficiency

Sm3+, Ce3+ codoped Al2O3–La2O3–SiO2 glasses were prepared and their luminescence properties were characterized. Blue-cyan to orange-red tunable luminescence was observed from these glasses with different excitation wavelengths ranging from 385 to 410 nm. White light emission with internal luminescence efficiency 42% has been observed using commercially available purple light-emitting-diode excitation. The energy transfer between Ce3+ and Sm3+ has also been investigated from fluorescence decay curves and spectral properties.

Tunable white-light emission and energy transfer in single-phase Bi3+,Eu3+ co-doped Ba9Y2Si6O24 phosphors for UV w-LEDs

2019 ◽  
Vol 213 ◽  
pp. 494-503 ◽  
Author(s):  
Hai Guo ◽  
Zhigang Zheng ◽  
Liming Teng ◽  
Rongfei Wei ◽  
Fangfang Hu
Keyword(s):  
Energy Transfer ◽  
White Light ◽  
Single Phase ◽  
Light Emission ◽  
White Light Emission ◽  
Co Doped
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