Thin chalcogenide films prepared by pulsed laser deposition – new amorphous materials applicable in optoelectronics and chemical sensors

Frumar, M.; Frumarová, Božena; Němec, Petr; Wágner, T.; Jedelský, J.; Hrdlicka, M.

doi:10.1016/j.jnoncrysol.2005.11.043

Cited by 135 publications

(62 citation statements)

References 98 publications

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“…In particular, the energies of individual chemical bonds in organic molecules are around 400 kJ/mol (e.g C-C, E= 347 kJ/mol; H-H, E = 437 kJ/mol; N-N, E = 388 kJ/mol), which corresponds to the energy of near-ultraviolet (NUV) electromagnetic radiation. An NUV laser pulse with a sufficiently high energy density (i.e., intensity) will cause a large enough perturbation to break these chemical bonds [28,29].…”

Section: Introductionmentioning

confidence: 99%

Laser assisted solid state reaction for the synthesis of ZnS and CdS nanoparticles from metal xanthate

2014

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Nanoparticles of CdS and ZnS were produced by a nanosecond laser using zinc (II) and cadmium (II) complexes of ethyl xanthate. Laser pulses with a peak wavelength of 355 nm, pulse repetition rate of 10 Hz, and pulse duration of ~ 4 ns were used. The sample exposure times were 10 min and 30 min respectively. The obtained nanoparticles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet-visible spectroscopy (UV-vis) and photoluminescence (PL) spectroscopy. The morphology and optical property of the synthesized nanoparticles were investigated as a function of the time of exposure. Upon extensive irradiation, the crystallinity of the CdS nanoparticles increased while the crystallinity of the ZnS nanoparticles decreased. The average crystallite size of the CdS nanoparticles estimated from the TEM image was 4.8 nm, while the presence of aggregates with no crystalline edges impeded the size determination of the ZnS nanoparticles. The absorption spectra showed that the nanoparticles exhibit quantum confinement.

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Section: Introductionmentioning

confidence: 99%

Laser assisted solid state reaction for the synthesis of ZnS and CdS nanoparticles from metal xanthate

2014

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“…the development of amplifiers and laser sources, optical sensors and all-optical processing components based on non-linear properties [1][2][3][4][5]. In this frame, a special chalcogenide glasses class, namely gallium lanthanum sulphide (GLS), has been evidenced (in particular when doped with rare earth elements) as an attractive non-toxic alternative to arsenic-based glasses, with optical transparency from the visible to infrared wavelengths, thermal stability, high refractive indices, high rare-earth solubility, high transition temperature and large photoinduced effects [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…), yet synthesis of chalcogenide thin films of complex composition, desired stoichiometry, good homogeneity and adhesion to the substrate and other specific physico-chemical properties is often found to be a difficult task for these "classical" methods. Pulsed laser deposition (PLD) evolved as one of the prospective techniques in this field, due to the simplicity of its principle, the possibility to obtain stoichiometric transfer of target material to the substrate and to fabricate films of unusual composition [3]. Although the PLD technique has been employed for almost two decades [13] to grow chalcogenide thin films, the control and optimization of the deposition parameters are still generally done in an empirical manner.…”

Section: Introductionmentioning

confidence: 99%

Plasma diagnostics in pulsed laser deposition of GaLaS chalcogenides

Pompilian¹,

Gurlui²,

Němec³

et al. 2013

Applied Surface Science

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The aim of this work is to characterize the ejection plume obtained by laser ablation of GaLaS (GLS) samples in order to better understand the ablation phenomena for optimizing the pulsed laser deposition of chalcogenide thin films. The dynamics of the plasma between target and substrate was investigated through timeand space-resolved optical emission spectroscopy. High-resolution optical spectra have been recorded in the UV-VIS range using a 500-mm focal length monochromator and a fast gate ICCD camera. From the space-time evolution of the optical signals, the velocities of various species (including neutrals and ions) have been derived. Using the relative intensity method, the space-and time-evolution of the excitation temperature and electronic density have been determined. A complex behavior of the laser ablation plasma has been revealed.

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“…Nevertheless, the slight difference in composition of the two crystalline phases measured by EDS could also contribute to the discrepancy. 13 The upper inset in Figure 2 shows the dependence of electrical conductivity on the phase change between amorphous and crystalline states. The significant change of electrical conductivity between amorphous and crystalline phases is a typical phenomenon going with phase change in GeTe-based phase change material.…”

mentioning

confidence: 99%

Phase-change control of ferromagnetism in GeTe-based phase change magnetic thin-films by pulsed laser deposition

et al. 2011

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Thin chalcogenide films prepared by pulsed laser deposition – new amorphous materials applicable in optoelectronics and chemical sensors

Cited by 135 publications

References 98 publications

Laser assisted solid state reaction for the synthesis of ZnS and CdS nanoparticles from metal xanthate

Laser assisted solid state reaction for the synthesis of ZnS and CdS nanoparticles from metal xanthate

Plasma diagnostics in pulsed laser deposition of GaLaS chalcogenides

Phase-change control of ferromagnetism in GeTe-based phase change magnetic thin-films by pulsed laser deposition

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