Infrared spectra of glassy Se containing small amounts of S,Te, As,or Ge |
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Authors: | Toshiaki Ohsaka |
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Institution: | National Institute for Research in Inorganic Materials, Sakura-mura, Niihari-gun, Ibaraki, Japan |
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Abstract: | The infrared transmission spectra of glassy Se containing 2.5 and 5.0 at % S, Te, As or Ge as well as pure Se were measured in the wavenumber region 400-60 cm?1 at room temperature. Besides the absorption bands reported already for pure Se, well-defined bands were founds at 355 cm?1 and 168 cm?1 for the addition of S, and at 205 cm?1 for Te. These new absorption bands attributed to Se3S5 and Se5Te3 mixed rings, respectively. For As, a strong absorption band appeared at 240 cm?1. The band near 135 cm?1 began to broaden and shift to lower frequency with As content. Two shoulder bands near 307 cm?1 and 278 cm?1 and a separated band at 195 cm?1 were found for Ge. With increasing Ge concentration the band at 135 cm?1 broadened and shifted to lower frequency. An interpretation for the new bands is presented on the basis of a molecular model. |
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