Auger-electron spectroscopy investigation of thin Ag-As-S-Se films

Todorov, R.; Tasseva, J.; Spasov, G.; Petkov, K.

doi:10.1088/1742-6596/223/1/012040

Cited by 1 publication

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“…The Raman spectra of the photodoped thin Ag/As 40 S 60−x Se x films at the thickness ratio of Ag layer/chalgonide film 1:10 indicate that silver atoms have probably been incorporated in the glassy network in the form of AgAsS(Se) 2 structural units after exposure with white light [19]. The Auger-electron spectroscopy profiles investigation of Ag photo-doped film with composition As 32 S 34 Se 34 supports the assumption that silver has been uniformly distributed in the chalcogenide films [20].…”

Section: Introductionmentioning

confidence: 53%

“…The films were exposed to white (mercury lamp 20 mW cm −2 ) or monochromatic light at λ = 488, 514 nm (Ar + laser 100 mW cm −2 ) and 632.8 nm (He-Ne laser-40 mW cm −2 ). Following the deposition process, the double-layered structure, chalcogenide/silver, was illuminated with Hg lamp in portions through the chalcogenide side until a homogeneous Ag-doped layer was obtained [19,20]. The samples were exposed in air.…”

Section: Methodsmentioning

confidence: 99%

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Spectral properties of the silver photodoping process in thin As–S–Se layers

Todorov¹,

Atanasova²,

Petkov³

et al. 2012

Semicond. Sci. Technol.

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This paper deals with the optical properties of thin chalcogenide films from the ternary As 33 S 67−x Se x system depending on the composition and conditions of illumination using various light sources (white light, monochromatic light with λ = 481, 514 (Ar + -laser) and 632.8 nm (He-Ne laser), respectively). The spectral dependence of the changes of the optical properties of thin As 33 S 67−x Se x layers with thickness d ∼ 150-190 nm doped with silver were investigated. The optical constants (refractive index, n and extinction coefficient, k) were calculated applying double TR methods using both measured transmittance, T and reflectance, R spectra. The optical constants of single layers from chalcogenide glass and from silver have been used to calculate the reflectance spectrum of the unexposed As-S-Se/Ag bilayer system. Applying Tauc's law, the optical band gap, E g and the structural parameter, B, related to the slope of the absorption edge, were determined.

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Section: Introductionmentioning

confidence: 53%

Section: Methodsmentioning

confidence: 99%