Electron structure of TiO₂ composite films with noble metal nanoparticles

• Опубліковано в: : Semiconductor Physics Quantum Electronics & Optoelectronics
• Дата: 2014
• Автори: Busko, T.O., Kulish, M.P., Dmytrenko, O.P., Vityuk, N.V., Eremenko, A.M.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2014
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/118358
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Electron structure of TiO₂ composite films with noble metal nanoparticles / T.O. Busko, M.P. Kulish, O.P. Dmytrenko, N.V. Vityuk, A.M. Eremenko // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2014. — Т. 17, № 1. — С. 67-74. — Бібліогр.: 19 назв. — англ.

Thin nanocrystalline films of ТіО₂, TiO₂/ZrO₂, TiO₂/ZrO₂/SiO₂,
 TiO₂/ZrO₂/SiO₂/Ag and TiO₂/ZrO₂/SiO₂/Au were prepared using the sol-gel synthesis
 method. In this paper, we determined the bandgap for direct and indirect band-to-band
 transitions. Optical conductivity of the films was determined using the spectral
 ellipsometry method. Depending on the nanocomposite composition, optical conductivity
 is of different character due to light absorption caused by the presence of the structure
 intrinsic defects: oxygen vacancies (F²⁺, F, and F⁺
 centers), Ti³⁺ ions and interstitial Ti
 atoms. Rearrangement of the electron spectrum in these thin films due to the
 aforementioned defects can improve photocatalytic activity in the UV and visible
 spectral ranges.