Abstract
based on Density Functional Theory, we investigated the electronic structures and the optical properties of Sb doped SnO2 with density of 12.5%.including band structure ,the density of state (dos),dielectric function and optical absorption spectrum. The results show that Fermi level access valence band gradually with the doped density. And this can attributed to the increased folded state. Which have enhanced the electrical and metal property of material ;The peaks of absorption Spectrum and dielectric spectrum correspond, Optical absorption edge decrease and the absorption peaks show blue shift.
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