Features of charge carrier transport in nanostructured  TiO2-C-Cu composite

Авторы: Konstantinova Elizaveta A., Martyshov Mikhail N., Kytina Ekaterina V., Savchuk Timofey P., Zaitsev Vladimir B., Ilin Alexander S., Lobacheva Viktoriia V., Forsh Pavel A.
Журнал: Materials
Том: 16
Год издания: 2023
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
DOI: 10.3390/ma12661810
Аннотация: Nanostructured titania (TiO2), due to its huge specific surface area, has a wide range of applications: from ordinary household dyes to sensors, solar cells and photocatalysts. Therefore, for the effective operation of TiO2-based devices, it is important to understand the patterns of electric charge transport. We have prepared the TiO2-C-Cu nanocomposites using electrochemical method. The band gap Eg of the all TiO2-C-Cu nanocomposites was approximately the same - 3.2 eV. There were found copper ions both substituting titanium ions, and copper ions in the composition of the CuO phase. The modification of TiO2-C nanotubes with Cu leads to a significant increase in conductivity. For the first time, the features of transport in theTiO2-C-Cu nanocomposites were revealed. The conductivity at DC current and at low frequencies of AC current is due to the movement of electrons along the conduction band, while at high frequencies, the hopping mechanism of conduction take place.
Добавил в систему: Константинова Елизавета Александровна

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