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Characteristics of arsenic selenide

2019-02-01
Arsenic selenide which chemical formula is As2Se3. 

Synthetic crystals of
arsenic triselenide are adult by vapour part technique in vacuum sealed tubes moreover as in tubes sealed below trditonal air pressure. In each the cases nucleation and growth were applied at 2 totally different temperatures. Crystals in vacuum grew within the sort of platelets of most size 5*1*0.2 mm3; within the second case, skinny isolated platelets and whiskers of most size 10×1 metric linear unit 2 and twelve mm length, severally grew within the tube. Crystals adult in each cases were known as ratio arsenic triselenide by diffraction powder patterns. Current-voltage characteristics showed resistance unit behaviour up to a field of four × 104 V/cm. The spectral dependence of the photocurrent exhibited the most response at zero.69 μm reminiscent of the band gap of one.79 eV.


The steady-state eletrical conduction has been measured and analysed for vitreous a-As2Se3 and gaseous a-As2Se3 films, and for non-stoichiometric vitreous As-Se alloys. Special attention was paid to the dependence on illumination energy and intensity, and to the temperature dependence of the photocurrent.

The structures of Ge-doped arsenic selenide glasses with Se contents variable between twenty five and nenity at. you are studied employing a combination of high-resolution, two-dimensional 77Se nuclear resonance(NMR) and Raman spectrum analysis. The results indicate that, in distinction to the traditional knowledge, the integrative volution of the structural property in Se-excess glasses doesn't follow the chain-crossing model, and chemical order is probably going profaned with the formation of atiny low however vital fraction of As–As bonds.