Abstract
Electrical conductivity, edge absorption and infrared transmission have been measured for Sb 2S 3Tl 2S and Sb 2S 3As 2S 3Tl 2S chalcogenide glasses as a function of glass composition. The electrical conductivity of the glasses of the two systems ranges from 10 −6 to 10 −9 Ω −1 cm −1 at 200 °C which indicates that these glasses are semiconductors. The variation of the activation energy indicates a change in the conduction mechanism. The optical gap values are 1.65 to 2.16 eV which class these glasses among wide-gap materials. These glasses possess a wide optical window that is maximum (12.66 μm) for the 0.8 Sb 2S 3−0.2 Tl 2S glass. As 2S 3 additions cause an infrared cut-off decrease from 13.3 to 11.36 μm.
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