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Giant persistent photoconductivity in BaTiO3/TiO2 heterostructures


Plodinec, Milivoj; Šantić, Ana; Zavašnik, Janez; Čeh, Miran; Gajović, Andreja
Giant persistent photoconductivity in BaTiO3/TiO2 heterostructures // Applied physics letters, 105 (2014), 152101-1 doi:10.1063/1.4897999 (međunarodna recenzija, članak, znanstveni)


Naslov
Giant persistent photoconductivity in BaTiO3/TiO2 heterostructures

Autori
Plodinec, Milivoj ; Šantić, Ana ; Zavašnik, Janez ; Čeh, Miran ; Gajović, Andreja

Izvornik
Applied physics letters (0003-6951) 105 (2014); 152101-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Persistent photoconductivity; BaTiO3/TiO2 heterostructures; FEG-SEM; Raman spectroscopy; impedance spectroscopy

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 hours. The PPC effect 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, FEG-SEM, and impedance spectroscopy.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Ustanove
Institut "Ruđer Bošković", Zagreb

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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