Photoluminescence Excitation Spectroscopy of Cd SxSe(1-x) Nanoparticles

1992 ◽  
Vol 283 ◽  
Author(s):  
Edward B. Stokes ◽  
Peter D. Persans
Keyword(s):  
Simple Model ◽  
Band Structure ◽  
Excitation Energy ◽  
Emission Spectrum ◽  
Energy Flux ◽  
Emission Intensity ◽  
Photoluminescence Excitation ◽  
Excitation Spectra ◽  
Photoluminescence Emission

ABSTRACTWe present photoluminescence excitation spectra for glasses doped with CdSxSe(1-x). The peak of the emission spectrum is blue shifted toward the bandgap as excitation energy flux is increased. Total photoluminescence emission intensity is observed to be significantly enhanced and blue shifted by exciting with photon energies greater than ∼4 eV. A simple model of the nanoparticle band structure is presented to account for the observed spectra.

scholarly journals PHOTOLUMINESCENCE EMISSION OF Cu DOPED ZnS MICROSTRUCTURES SYNTHESIZED BY THERMAL EVAPORATION

2018 ◽  
Vol 34 (2) ◽  
Author(s):  
Nghia Nguyen Van
Keyword(s):  
Thermal Evaporation ◽  
Hexagonal Phase ◽  
Green Emission ◽  
Blue Shift ◽  
Xrd Analysis ◽  
Photoluminescence Excitation ◽  
Excitation Spectra ◽  
Thermal Evaporation Method ◽  
Photoluminescence Emission ◽  
Green Emission Band

Cu doped ZnS microstructures were prepared by the thermal evaporation method using ZnS powder and CuCl2.2H2O powder as precusor materials. The microstructures was characterized by using X-ray diffraction (XRD) analysis. The XRD studies indicated that there are two phases (ZnS and ZnO) at the undoped sample, but  most of the samples are only having wurtzite (hexagonal) phase of ZnS after doping. The photoluminescence emission and photoluminescence excitation of ZnS and Cu2+ doped ZnS microstructures have been studied. The photoluminescence excitation spectra of  ZnS microstructures is present around 374 nm. After doping of Cu2+ ion the absorption wavelength shifted towards the lower wavelength, this blue shift in the absorption edge is a measure of increased band gap. The emission spectrum of pure ZnS has a green emission band centred at around 520 nm. After doping with Cu2+ ion the luminescence centers were transferred to 516 nm and a strong blue peak at 440 nm appears. The reasons of these will be discussed in this paper.

Discussion of the band structure effects on thermoemission as deduced from a simple model

1976 ◽  
Vol 37 (2) ◽  
pp. 149-158 ◽  
Author(s):  
A.K. Bhattacharjee ◽  
B. Caroli ◽  
D. Saint-James
Keyword(s):  
Simple Model ◽  
Band Structure

scholarly journals Effects of selenisation temperature on photoluminescence and photoluminescence excitation spectra of ZnO/CdS/Cu2ZnSnSe4/Mo/glass

2019 ◽  
Vol 672 ◽  
pp. 146-151 ◽  
Author(s):  
M.A. Sulimov ◽  
M.V. Yakushev ◽  
J. Márquez-Prieto ◽  
I. Forbes ◽  
P.R. Edwards ◽  
...  
Keyword(s):  
Photoluminescence Excitation ◽  
Excitation Spectra

A study of the nuclear disintegrations produced by 950 MeV protons

1955 ◽  
Vol 231 (1186) ◽  
pp. 368-378 ◽  
Keyword(s):  
Simple Model ◽  
Excitation Energy ◽  
Residual Nucleus ◽  
Parent Nucleus ◽  
Heavy Nuclei ◽  
Substantial Fraction ◽  
Photographic Emulsions ◽  
Mev Protons

Nuclear disintegrations produced in the heavy nuclei of Ilford G 5 photographic emulsions by 950 MeV protons have been analyzed in detail. The characteristics of the disintegrations observed can be explained in terms of a simple model which assumes that a substantial fraction of the π mesons created is reabsorbed in the parent nucleus and that the energy of these mesons contributes mainly to the excitation energy of the residual nucleus.

The Relation of Thin Film Electroluminescence and Photoluminescence Excitation Spectra

1989 ◽  
pp. 105-108
Author(s):  
Zhilin Zhang ◽  
Zhuotong Li ◽  
Biao Mei ◽  
Xueyin Jiang ◽  
Peifang Wu ◽  
...  
Keyword(s):  
Thin Film ◽  
Photoluminescence Excitation ◽  
Excitation Spectra

Band structure and spontaneous emission spectrum of InGaAsSb/GaSb quantum well

2014 ◽  
Vol 26 (11) ◽  
pp. 111008
Author(s):  
安宁 An Ning ◽  
李占国 Li Zhanguo ◽  
何斌太 He Bintai ◽  
芦鹏 Lu Peng ◽  
方铉 Fang Xuan ◽  
...  
Keyword(s):  
Band Structure ◽  
Quantum Well ◽  
Emission Spectrum ◽  
Spontaneous Emission ◽  
Spontaneous Emission Spectrum

scholarly journals Probing the valence band structure of wurtzite InP nanowires by photoluminescence excitation spectroscopy

2011 ◽  
Author(s):  
H. E. Jackson ◽  
S. Perera ◽  
K. Pemasiri ◽  
L. M. Smith ◽  
J. Yarrison-Rice ◽  
...  
Keyword(s):  
Band Structure ◽  
Valence Band ◽  
Photoluminescence Excitation ◽  
Valence Band Structure
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