Abstract
The properties of chalcogenides that are most important for applications as infrared transmitting materials are reported and their mutual relationships are given. Si5Se80In15 films were produced by means of thermal evaporation. The refractive index and the optical energy gap were determined by transmission measurements. Parameters considered in this study are density, molar volume, transition temperatures, electrical properties, infrared transmission, extinction coefficient and refractive index. This composition has no extrinsic and intrinsic absorption between 14 and 20μm and the value of absorption coefficient is estimated lower than 10−3cm−1 at 10.6μm. This glass is also suitable for infrared optical elements. A p–n junction is observed due to evaporated thin film of alloy on p-type Ge substrate.
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