Photoluminescence and photocatalytic activity of zinc tungstate powders

Open Physics ◽  
2011 ◽  
Vol 9 (2) ◽  
Author(s):  
Larisa Gigorjeva ◽  
Donats Millers ◽  
Jānis Grabis ◽  
Dzidra Jankoviča
Keyword(s):  
Grain Size ◽  
Photocatalytic Activity ◽  
Decay Time ◽  
Uv Light ◽  
Combustion Method ◽  
Time Correlation ◽  
Luminescence Decay ◽  
Luminescence Spectra ◽  
Luminescence Decay Time ◽  
Decay Kinetics

AbstractZnWO4 powders with grain size in range 20 nm–10 µm have been synthesized by a simple combustion method and subsequent calcinations. The photocatalytic activities of powders were tested by degradation of methylene blue solution under UV light. The luminescence spectra and luminescence decay kinetics were studied and luminescence decay time dependence on average powder-grain size was obtained. The correlation between self-trapped exciton luminescence decay time and photocatalytic activity of ZnWO4 powders was shown. A model explaining the excitonic luminescence decay time correlation with photocatalytic activity was proposed.

scholarly journals The Luminescent Centra in thin Films of β–Ga2O3 and (Y0.06Ga0.94)2O3

2016 ◽  
Vol 17 (1) ◽  
pp. 53-59
Author(s):  
O.M. Bordun ◽  
B.O. Bordun ◽  
I.Yo. Kukharskyy ◽  
I.I. Medvid
Keyword(s):  
Thin Films ◽  
Decay Time ◽  
High Frequency ◽  
Luminescence Decay ◽  
Luminescence Spectra ◽  
Luminescence Decay Time ◽  
Photoluminescence Spectra ◽  
Different Types

Photoexcitation and photoluminescence spectra of b–Ga2O3 and (Y0.06Ga0.94)2O3 thin films obtained by high-frequency ion-plasmous sputtering was investigated. Luminescence spectra were factorized on ultimate constituents using Alentsev-Fock method. The nature of two intensive luminescent band with maxima in region 3.00 and 3.15 eV and two faint intensive luminescent band with maxima in region 4.00 and 4.25 eV was discussion. Luminescence decay time for band with maximum in region 3.00 and 3.15 eV in different types of b–Ga2O3 and (Y0.06Ga0.94)2O3 thin films was established.

A new lanthanum oxysulfide-based IR phosphor with a controlled luminescence decay time

2015 ◽  
Vol 51 (5) ◽  
pp. 466-472 ◽  
Author(s):  
O. Ya. Manashirov ◽  
E. M. Zvereva ◽  
A. N. Lobanov
Keyword(s):  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time

Inexpensive laser luminescence decay time apparatus

1976 ◽  
Vol 48 (2) ◽  
pp. 353-357 ◽  
Author(s):  
J. N. Demas ◽  
C. M. Flynn
Keyword(s):  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time

Temperature Dependence of Luminescence Decay Time of InP Quantum Disks

1999 ◽  
Vol 38 (Part 1, No. 2B) ◽  
pp. 1094-1097 ◽  
Author(s):  
Tsuyoshi Okuno ◽  
Hong-Wen Ren ◽  
Mitsuru Sugisaki ◽  
Kenichi Nishi ◽  
Shigeo Sugou ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time ◽  
Quantum Disks

scholarly journals Time response of water-based liquid scintillator from X-ray excitation

2020 ◽  
Vol 1 (1) ◽  
pp. 71-76 ◽  
Author(s):  
Drew R. Onken ◽  
Federico Moretti ◽  
Javier Caravaca ◽  
Minfang Yeh ◽  
Gabriel D. Orebi Gann ◽  
...  
Keyword(s):  
Decay Time ◽  
Liquid Scintillator ◽  
Luminescence Decay ◽  
Time Response ◽  
Luminescence Decay Time ◽  
X Ray ◽  
Water Based ◽  
The Impact

The impact of PPO concentration in LAB micelles on the luminescence decay time is determined.

scholarly journals Luminescent and Scintillation Properties of CeAlO3 Crystals and Phase-Separated CeAlO3/CeAl11O18 Metamaterials

Crystals ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 296
Author(s):  
Oleg Sidletskiy ◽  
Pavlo Arhipov ◽  
Serhii Tkachenko ◽  
Iaroslav Gerasymov ◽  
Georgy Trushkovsky ◽  
...  
Keyword(s):  
Decay Time ◽  
Growth Process ◽  
Uv Light ◽  
Light Yield ◽  
Luminescence Decay ◽  
Crystalline Film ◽  
Time Value ◽  
Light Excitation ◽  
Single Crystalline Film ◽  
Α Particles

This work is dedicated to the growth process and investigation of luminescent and scintillation properties of CeAlO3 single crystals and CeAlO3/CeAl11O18 metamaterials under e-beam and α-particles excitation. It has been shown that cathodoluminescence and radioluminescence spectra of CeAlO3 crystals contain two bands, peaking at 440 and 500 nm, and caused by the Ce3+ 5d–4f transitions into CeAl11O18 phase, which is present in these crystals as an admixture. Under 270 nm ultraviolet (UV) light excitation, a CeAlO3 crystal possesses complicated non-exponential luminescence decay, with the average decay time of 16 ns. The light yield of CeAlO3 crystals under α-particle excitation is about 16% and 12%, in respect to the standard Bi4Ge3O12 (BGO) crystal and Y3Al5O12:Ce (YAG:Ce) single crystalline film samples, respectively. The CeAlO3 scintillation decay is quite fast, with the decay time value t1/e in the 54–56 ns range.

Lithium and lithium-carbon isoelectronic complexes in silicon: Luminescence-decay-time, absorption, isotope-splitting, and Zeeman measurements

1984 ◽  
Vol 29 (8) ◽  
pp. 4517-4523 ◽  
Author(s):  
E. C. Lightowlers ◽  
L. T. Canham ◽  
G. Davies ◽  
M. L. W. Thewalt ◽  
S. P. Watkins
Keyword(s):  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time

Enabling luminescence decay time-based sensing using integrated organic photodiodes

2013 ◽  
Vol 405 (18) ◽  
pp. 5975-5982 ◽  
Author(s):  
Martin Sagmeister ◽  
Andreas Tschepp ◽  
Elke Kraker ◽  
Tobias Abel ◽  
Bernhard Lamprecht ◽  
...  
Keyword(s):  
Decay Time ◽  
Luminescence Decay ◽  
Luminescence Decay Time
Sign in / Sign up

Export Citation Format

Share Document