Time-resolved photoluminescence and x-ray luminescence studies on rare-earth oxysulfide phosphors

2000 ◽  
Author(s):  
Jonathan P. Creasey ◽  
Glenn C. Tyrrell
Keyword(s):  
Rare Earth ◽  
Time Resolved ◽  
X Ray ◽  
Time Resolved Photoluminescence ◽  
Rare Earth Oxysulfide

X-Ray Image Intensifier Tubes Using Rare Earth Oxysulfide Phosphors

1970 ◽  
Vol 17 (1) ◽  
pp. 49-56 ◽  
Author(s):  
S. P. Wang ◽  
O. Laudi ◽  
H. Lucks ◽  
K. A. Wickersheim ◽  
R. A. Buchanan
Keyword(s):  
Rare Earth ◽  
Image Intensifier ◽  
X Ray ◽  
Rare Earth Oxysulfide

scholarly journals Time-resolved photoluminescence of LaBr3:Ce scintillation crystals under ultrasoft X-ray excitation

2012 ◽  
Vol 38 (9) ◽  
pp. 784-788 ◽  
Author(s):  
V. A. Pustovarov ◽  
V. Yu. Ivanov ◽  
D. I. Vyprintsev ◽  
N. G. Shvalev
Keyword(s):  
Time Resolved ◽  
X Ray ◽  
Scintillation Crystals ◽  
Time Resolved Photoluminescence

Plasmon Enhanced Emission of Perovskite Quantum Dot Films

MRS Advances ◽  
2018 ◽  
Vol 3 (14) ◽  
pp. 733-739 ◽  
Author(s):  
Seyma Dadı ◽  
Yemliha Altıntas ◽  
Emre Beskazak ◽  
Evren Mutlugun
Keyword(s):  
Quantum Dot ◽  
Au Nanoparticles ◽  
Au Nanoparticle ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Transmission Electron ◽  
Coating Method ◽  
Photoluminescence Enhancement ◽  
Time Resolved Photoluminescence

ABSTRACTWe propose and demonstrate the photoluminescence enhancement of CsPbBr3 perovskite quantum dot films in the presence of Au nanoparticles. Embedded into a polymer matrix, Au nanoparticle- quantum dot film assemble prepared by an easy spin coating method enabled the photoluminescence enhancement of perovskite quantum dot films up to 78%. The properties of the synthesized perovskite QDs and gold nanoparticles have been analysed using high resolution transmission electron microscopy, X-ray diffraction, energy dispersive X- ray spectroscopy, UV-Vis absorption spectrophotometer, steady state and time-resolved photoluminescence spectrometer.

X-ray studies and time-resolved photoluminescence on optically pumped antimonide-based midinfrared type-II lasers

2004 ◽  
Vol 60 (14) ◽  
pp. 3387-3392 ◽  
Author(s):  
Carsten Schwender ◽  
Jan Oliver Drumm ◽  
Goetz Hoffmann ◽  
Birgit Vogelgesang ◽  
Henning Fouckhardt
Keyword(s):  
Type Ii ◽  
Optically Pumped ◽  
Time Resolved ◽  
X Ray ◽  
Time Resolved Photoluminescence

Time-Resolved Photoluminescence Microscopy Combined with X-ray Analyses and Raman Spectroscopy Sheds Light on the Imperfect Synthesis of Historical Cadmium Pigments

2018 ◽  
Vol 90 (18) ◽  
pp. 10771-10779 ◽  
Author(s):  
Marta Ghirardello ◽  
Sara Mosca ◽  
Javier Marti-Rujas ◽  
Luca Nardo ◽  
Aviva Burnstock ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Time Resolved ◽  
X Ray ◽  
Photoluminescence Microscopy ◽  
Time Resolved Photoluminescence

scholarly journals Tuning the Photo-Luminescence Properties of WO3 Layers by the Adjustment of Layer Formation Conditions

Materials ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 2814 ◽  
Author(s):  
Milda Petruleviciene ◽  
Jurga Juodkazyte ◽  
Maliha Parvin ◽  
Alla Tereshchenko ◽  
Simonas Ramanavicius ◽  
...  
Keyword(s):  
Sol Gel ◽  
Photo Luminescence ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Photoluminescence Decay ◽  
Formation Conditions ◽  
Sol Gel Synthesis ◽  
Time Resolved Photoluminescence ◽  
Dipping Time

In this research we have applied sol-gel synthesis for the deposition of tungsten (VI) oxide (WO3) layers using two different reductants (ethanol and propanol) and applying different dipping times. WO3 samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier Transform Infrared spectroscopy (FTIR), photoluminescence (PL) and time-resolved photoluminescence decay methods. Photoelectrochemical (PEC) behaviour of synthesized coatings was investigated using cyclic voltammetry in the dark and under illumination. Formation of different structures in differently prepared samples was revealed and significant differences in the PL spectra and PEC performance of the samples were observed. The results showed that reductant used in the synthesis and dipping time strongly influenced photo-electrochemical properties of the coatings. Correlation between the morphology, PL and PEC behaviour has been explained.

Emission Mechanism of the InGaN MQW Grown by MOCVD

1996 ◽  
Vol 449 ◽  
Author(s):  
Yukio Narukawa ◽  
Yoichi Kawakami ◽  
Shizuo Fujita ◽  
Shigeo Fujita ◽  
Shuji Nakamura
Keyword(s):  
Dynamical Behavior ◽  
Multiple Quantum Well ◽  
Multiple Quantum ◽  
Rich Region ◽  
Time Resolved ◽  
Tail State ◽  
X Ray ◽  
Transmission Electron ◽  
Valence Bands ◽  
Time Resolved Photoluminescence

ABSTRACTDynamical behavior of radiative recombination has been assessed in the In0.20Ga0.80N (3nm)/In0.05Ga0.95N (6 nm) multiple quantum well (MQW) structure by means of transmittance (TR), electroreflectance (ER), photoluminescence excitation (PLE) and time-resolved photoluminescence (TRPL) spectroscopy. The PL at 20 K was mainly composed of two emission bands whose peaks are located at 2.920 eV and 3.155 eV. The ER and PLE revealed that the transition at 3.155 eV is due to the excitons at quantized level between n=1 conduction and n=1 A(Γ9υ) valence bands, while the main PL peak at 2.920 eV is attributed to the excitons localized at the trap centers within the well. The TRPL features were well understood as the effect of localization where photo-generated excitons are transferred from the n=1 band to the localized centers, and then are localized further to the tail state. The origin of the localized centers were attributed to the In-rich region in the wells acting as quantum dots which could be observed by transmission electron microscopy (TEM) and energy-dispersive X-ray microanalysis (EDX).

Luminescence Mechanism of ZnWO4 Nanopowder Synthesized by Microwave-Assisted Heating

2013 ◽  
Vol 470 ◽  
pp. 44-47
Author(s):  
Ming Kwen Tsai ◽  
Yueh Chien Lee ◽  
Chia Chih Huang ◽  
Sheng Yao Hu ◽  
Kwong Kau Tiong ◽  
...  
Keyword(s):  
Microwave Assisted Synthesis ◽  
X Ray Diffraction ◽  
Time Resolved ◽  
X Ray ◽  
Pl Spectra ◽  
Calcination Temperatures ◽  
Microwave Assisted ◽  
Zinc Tungstate ◽  
Xrd Patterns ◽  
Time Resolved Photoluminescence

The luminescence investigations on the calcinated zinc tungstate nanopowder (ZnWO4 NP) synthesized by microwave-assisted synthesis are presented using photoluminescence (PL) and time-resolved photoluminescence (TRPL) analyses. The X-ray diffraction (XRD) patterns exhibit that the significant wolframite structure of ZnWO4 NP can be detected at calcination temperatures above 300 °C. The 12 K PL and TRPL results demonstrated that the deformation of WO6 octahedra is responsible for the low-energy side of PL spectra and dominate the red-shifted PL spectra with increasing calcination temperatures.

X-Ray Exposure Reduction Using Rare-Earth Oxysulfide Intensifying Screens

Radiology ◽  
1972 ◽  
Vol 105 (1) ◽  
pp. 185-190 ◽  
Author(s):  
Robert A. Buchanan ◽  
Solon I. Finkelstein ◽  
Kenneth A. Wickersheim
Keyword(s):  
Rare Earth ◽  
X Ray ◽  
Exposure Reduction ◽  
Rare Earth Oxysulfide
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