[17p-W9_323-1~10] CS.7 Code-sharing Session of 6.5 & 7.5

4:00 PM - 4:15 PM JST(7:00 AM - 7:15 AM UTC)

[17p-W9_323-10] Solar 2-photon absorption rate change induced by O vacancy condensation in rutile TiO₂

〇Koichi Kato¹, Katsuyuki Fukutani¹ (1.IIS Tokyo Univ.)

Keywords:

TiO2,oxygen vacancy,2 photon excitations

O vacancies in rutile TiO2 tend to be condensed under the TiO2 surfaces. Photoabsorption in the rutile TiO2 with condensed O vacancies is studied with DFT theoretical calculations. Photoabsorption is found be proportional to the number of O vacancies, and does not correlate with O vacancy interactions. The photoabsorption is, however, influenced by the reduction of defect electrons because the energy levels change with the electron reduction.