Cd–Ne direct current glow discharge: An efficient source of ultraviolet radiation

Petrov, G. M.; Petrova, Ts.; Ogoyski, A.I.; Blagoev, A.

doi:10.1063/1.126870

Cited by 3 publications

(2 citation statements)

References 5 publications

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“…Most of the absorbance spectra in that region are perturbed by noise; however, in some cases, some optical absorption peaks are observed, which could be related with these PL bands. These emissions seem to be the intraatomic energy transitions of the Cd atom: (a) 5p 3 P 0 , (b) 5p 3 P 1 , and (c) 5p 3 P 2 to 5s 1 S 0 , with energy transitions 3.74, 3.80, and 3.95 eV, respectively [71]; these values have an average value of 0.06 eV. Then, the emissions reported in this work come from Cd atoms transitions.…”

Section: (Right)mentioning

confidence: 98%

Optical properties of CdS nanocrystalline thin films in the abrupt phase transition from zinc blende to wurtzite

Torres‐Castanedo

Márquez‐Marín²,

Castanedo‐Pérez³

et al. 2020

J Mater Sci: Mater Electron

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A set of cadmium sulfide (CdS) thin films was grown on glass substrates by the chemical bath deposition technique at different bath temperatures (T b ). A microwave oven was used to heat the precursor aqueous solution employed to prepare the films in the 60-97 °C interval. The average crystallite size of the CdS films lies in the 7-20 nm range, calculated from X-ray diffraction data. The diffraction patterns reveal that the crystalline structure of CdS nanoparticles is cubic zinc blende (ZB) for 60 ≤ T b ≤ 93 °C, hexagonal wurtzite (WZ) for 95 ≤ T b ≤ 97 °C, and ZB-WZ mix of phases for the critical temperature T b ≅ 94 °C (T bc ). The mixture of both phases is supported by Transmission Electron Microscopy. The CdS films show preferred orientation along ( 111) and ( 002) directions for ZB and WZ, respectively. The optical properties reveal significant changes at T bc , namely, the energy band gap, photoluminescence emission, and refractive index. The photoluminescence results show an additional band at the critical phase transition temperature due to the presence of a high-density Cd interstitial/vacancies, produced by the mix of phases. Furthermore, high-energy transitions above the conduction band also exhibit splitting due to the phase transition.

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Section: (Right)mentioning

confidence: 98%

Optical properties of CdS nanocrystalline thin films in the abrupt phase transition from zinc blende to wurtzite

Torres‐Castanedo

Márquez‐Marín²,

Castanedo‐Pérez³

et al. 2020

J Mater Sci: Mater Electron

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“…An obvious way of designing alternative fluorescent lamps involves the replacement of mercury with other metals of the same element group, which also show an efficient UV emission. In studies of a neon-cadmium dc column plasma an efficiency of about 80% has been reported for the 223 and 326 nm resonance radiation of Cd [2]. Here, a total pressure of 200 Pa, currents in the range from 100 to 300 mA in a tube of 30 mm in diameter and an admixture of 5% Cd have been applied.…”

Section: Introductionmentioning

confidence: 99%

Low-pressure mercury-free plasma light sources: experimental and theoretical perspectives

Uhrlandt

Bussiahn

Gorchakov

et al. 2005

J. Phys. D: Appl. Phys.

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The replacement of mercury in conventional fluorescent lamps by other components is highly desirable for environmental reasons. This paper gives a short review of new types of mercury-free plasma light sources operating at low pressure. In particular, the features of cylindrical glow discharges in rare-gas mixtures including xenon are discussed, focusing on the generation of the 147 nm resonance radiation of xenon and its transition into visible light by new phosphors with sufficient efficiency. Laser absorption and vacuum ultraviolet emission spectroscopy are applied for several rare-gas mixtures to reveal the contributions of the different gas components and their excited states to the power balance and radiation output. The experimental research is assisted by theoretical studies applying self-consistent hybrid models of the cylindrical column plasma. The good agreement between experimental and theoretical results obtained at selected discharge conditions makes it possible to predict optimum discharge parameters by means of extensive model calculations. It is demonstrated that about half of the efficacy of a mercury fluorescent lamp can be reached if the rare-gas discharge is operated at pressures below 100 Pa.

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Rotational profiles in the excitation spectrum recorded for the B31(53P1) ⿿ X10+(51S0) transition in CdNe van der Waals complex

Urbasczyk

Koperski

2016

Chemical Physics Letters

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Cd–Ne direct current glow discharge: An efficient source of ultraviolet radiation

Cited by 3 publications

References 5 publications

Optical properties of CdS nanocrystalline thin films in the abrupt phase transition from zinc blende to wurtzite

Optical properties of CdS nanocrystalline thin films in the abrupt phase transition from zinc blende to wurtzite

Low-pressure mercury-free plasma light sources: experimental and theoretical perspectives

Rotational profiles in the excitation spectrum recorded for the B31(53P1) ⿿ X10+(51S0) transition in CdNe van der Waals complex

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