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- W1982849185 abstract "Optical measurements of fundamental absorption edge of bismuth–vanadate glass films containing 70 to 95 mol% V2O5 are made in the wavelength range 200 to 700 nm. The absorption edge in these glasses obeys the relation α ∼ (hω – Eopt)2/hω. The optical band gap, (Eopt) is determined to be 2.30 to 2.15 eV, depending on compositions of the glass and is found to decrease with increase of V2O5 content in the glass. The absorption coefficient is found to depend exponentially on the photon energy, which is explained to be due to the exponential distribution of the localized states in the optical gap.Im Wellenlangenbereich von 200 bis 700 nm werden optische Messungen der Grundgitterabsorptionskante von Wismutvanadatglasschichten mit 70 bis 95 Mol% V2O5 durchgefuhrt. Die Absorptionskante dieser Glaser befolgt die Beziehung α ∼ (hω – Eopt)2/hω. Die optische Bandlucke (Eopt) wird zu 2,30 bis 2,15 eV bestimmt, abhangig von der Zusammensetzung der Glaser, und es wird gefunden, das sie mit steigendem V2O5-Gehalt der Glaser abnimmt. Der Absorptionskoeffizient hangt exponentiell von der Photonenenergie ab, was durch die exponentielle Verteilung der lokalisierten Zustande in der optischen Bandlucke erklart wird." @default.
- W1982849185 created "2016-06-24" @default.
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- W1982849185 date "1988-12-16" @default.
- W1982849185 modified "2023-09-27" @default.
- W1982849185 title "Fundamental absorption edge in bismuth–vanadate glasses" @default.
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- W1982849185 doi "https://doi.org/10.1002/pssa.2211100238" @default.
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