Naslov
Giant persistent photoconductivity in BaTiO3/TiO2 heterostructures

Autori
Plodinec, Milivoj ; Šantić, Aana ; Zavašni, Janez ; Čeh, Miran ; Gajović, Andreja

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
TO-BE Spring Meeting 2015 / Ferreira, Paula ; Tatiana Fittipaldi, Rosalba - Aveiro : University of Aveiro, Materials and Ceramic Engineering, CICECO, 2016, 02-02

Skup
TO-BE Spring Meeting 2015

Mjesto i datum
Aveiro, Portugal, 30.03.2015. - 02.04.2015

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
heterojunctions; photoconductivity; vacancies; nanotubes; surface conductivity

Sažetak
The persistent photoconductivity (PPC) effect in nanotube arrays of barium titanate and TiO2 (BTO/TiO2NT) was studied at room temperature under daylight illumination. The BTO/TiO2NT heterostructures exhibited a giant PPC effect that was six orders of magnitude higher than the dark conductivity, followed by a slow relaxation for 3 h. The PPC in this material was explained by the existence of defects at the surfaces and the interfaces of the investigated heterostructures. The sample was prepared using a two- step synthesis: the anodization of a Ti-foil and a subsequent hydrothermal synthesis. The structural and electrical characteristics were studied by micro-Raman spectroscopy, field-emission-gun scanning electron microscopy, and impedance spectroscopy.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA