Journal ArticleDOI
Polycrystalline thin film ZnSexTe1-x: preparation and properties
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TLDR
ZnSexTe1-x films were prepared by co-evaporating ZnSe and ZnTe powders from a two-zone hot wall evaporation jig onto glass substrates.Abstract:
ZnSexTe1-x films were prepared by co-evaporating ZnSe and ZnTe powders from a two-zone hot wall evaporation jig onto glass substrates. The optical band gaps for different x were determined and this showed a bowing behaviour. The refractive indices and extinction coefficients have been determined as a function of wavelength. Variations of surface roughness with composition and microstructural details were also reported. Grain boundary scattering effects were found to be a dominant factor controlling electron transport processes in these films.read more
Citations
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Microstructure and optical studies of electron beam evaporated ZnSe1−xTex nanocrystalline thin films
TL;DR: In this paper, the structure and optical properties of nanocrystalline thin films of ZnSe 1− x Te x (0.0, x ǫ ≥ 1.0) were examined using X-ray diffraction technique and revealed that the deposited films have polycrystalline zinc blend structure with lattice constant, a, increasing linearly from 0.55816 to 0.59989 nm as x varies from 0 to 1.
Journal ArticleDOI
Thickness-dependent nonlinear absorption behaviors in polycrystalline ZnSe thin films
TL;DR: In this paper, the life time of localized defect states on grain boundary was found to be ~ 3 ns from ultrafast pump-probe spectroscopy for polycrystalline ZnSe thin films.
Journal ArticleDOI
Optical characterization of polycrystalline ZnSe1−xTex thin films using variable angle spectroscopic ellipsometry and spectrophotmetery techniques
TL;DR: In this article, the optical properties of polycrystalline ZnSe1−xTex (0.0≤x≤1.0) thin films were compared using variable angle spectroscopic ellipsometry (VASE) and spectrophotometry.
Journal ArticleDOI
Metalorganic chemical vapor deposition of ZnSe films on glass and GaAs(111) substrates
TL;DR: In this paper, the authors studied the low-temperature growth and doping of polycrystalline ZnSe by MOCVD using ditertiary-butylselenide (DtBSe) and dimethylzinc-triethylamine (DMZn-TEN) precursors.
Journal ArticleDOI
Structural and optical analyses of polycrystalline Zn1−xSbxSe thin films prepared by resistive heating technique
Rashad Rashid,Arshad Mahmood,U. Aziz,A. Shah,Zahid Ali,Q. Raza,Abdul Malik,Muhammad Asim Rasheed +7 more
TL;DR: In this paper, the influence of Sb doping on the structural and optical properties of Zn 1− x Sb x Se (0,⩽, x ǫ⩾ 0.15) thin films prepared by thermal evaporation technique on glass substrate was reported.
References
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Journal ArticleDOI
The variation of energy gap with composition in ZnS-Te alloys
R Hill,D Richardson +1 more
TL;DR: In this paper, the optical energy gap and the lattice parameters of ZnSxTe1-x have been measured, and the energy gap bowing is compared with previous theoretical estimates.
Journal ArticleDOI
Evolution of the band gap and the dominant radiative recombination center versus the composition for ZnSe1−xTex alloys grown by molecular beam epitaxy
TL;DR: In this paper, the optoelectronic properties of ZnSe1−xTex alloys grown by molecular beam epitaxy over the entire range of compositions were investigated and the main luminescence emission observed at 5 K becomes narrower and closer to the band-gap energy as the Te content increases.
Journal ArticleDOI
Grain boundary scattering in CuInSe2 films
TL;DR: In this paper, the effects of grain boundary scattering on electron transport properties were studied carefully and it was observed that scattering at the grain boundaries is a predominant factor controlling the electron transport at lower temperatures while complex scattering mechanisms become operative at higher temperatures.
Journal ArticleDOI
Localization of excitons and Anderson transition in ZnSe1-xTex solid solutions
A. Reznitsky,S.A. Permogorov,S. Verbin,A. Naumov,Yu. V. Korostelin,V. Novozhilov,S. Prokov'ev +6 more
TL;DR: In this paper, low temperature luminescence spectra of ZnSe1-xTex mixed crystals with Te concentration up to 22 at % have been studied for the first time and strong exciton localization by the aggregates composed by several Te atoms has been observed.
Journal ArticleDOI
Energy gap variations and structural phase changes in CdSTe alloy thin films
R. Hill,D. Richardson +1 more
TL;DR: In this paper, thin films of CdSx Te1−x have been prepared by electron-beam evaporation throughout the composition range, and optical energy gaps have been measured, and observed variation of energy gap with composition is compared with previous results and with theoretical prediction.