| Popis: |
As advanced semiconductor materials, Ga1-xAlxN alloys are widely used. In order to research the optical properties of Ga1-xAlxN with different Al component, we built models of GaN, Ga0.875Al0.125N, Ga0.750Al0.250N, Ga0.625Al0.375N, and AlN, and calculated the optical properties of the five crystals based on first principle calculations. Results show that the static dielectric constant decreases when the Al component increases, and the absorption peak shifts to higher energy. The threshold wavelength of Ga1-xAlxN is lower and lower when the Al component increases, and the Ga1-xAlxN material owns “solar blind” property when the Al component is higher than 0.25. |
