Particularities of estimating the optical band gap of the phase change memory thin films

Lazarenko, Petr; Vorobyov, Yu. V.; Fedyanina, M. E.; Шерченков, А. А.; Kozyukhin, S. A.; Yakubov, A. O.; Kukin, A. V.; Sybina, Yu. S.; Sagunova, I. V.

doi:10.30791/1028-978x-2019-10-14-25

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2021

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“…(1) where, A is a constant depending on the nature of optical transitions. Previously, this approach has been successfully used in particular in (Lazarenko et al 2019) to study a compound of Ge-Sb-Te system.…”

Section: Experimental Methodsmentioning

confidence: 99%

Effect of doping of molybdenum on the optical properties of glasses of the As—S system

Provotorov

Avanesyan

Krbal

et al. 2021

Physics of Complex Systems

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This article discusses the spectral dependences of the absorption coefficient of thin arsenic sulphide films obtained by spin-coating, identified using a single-beam spectrophotometer in the wavelength range of 400-1000 nm. The effect of doping of molybdenum on the optical band gap is studied. While for a pure glass the band gap decreases with higher sulphur concentration, the opposite trend is observed in glass doped with molybdenum. Molybdenum doping also leads to an increase in Urbach energy. The obtained experimental curves are compared with theoretical ab-initio calculations.

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Section: Experimental Methodsmentioning

confidence: 99%