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.
References
1.
S. F.
Wang
and G. O.
Dayton
, J. Am. Ceram. Soc.
82
, 2677
(1999
).2.
D.
Hennings
, M.
Klee
, and R.
Waser
, Adv. Mater.
3
, 334
(1991
).3.
A. F.
Yildirim
, C.
Ucurum
, R. R.
Schliewe
, W.
Bauhofer
, M. R.
Meixner
, H.
Goebel
, and W.
Krautschneider
, Appl. Phys. Lett.
90
, 083501/1
(2007
).4.
P.
Tang
, J. D.
Towner
, L. A.
Meier
, and W. B.
Wessels
, IEEE Photon. Tech. Lett.
16
, 1837
(2004
).5.
A.
Petraru
, J.
Schubert
, M.
Schmid
, and C.
Buchal
, Appl. Phys. Lett.
81
, 1375
(2002
).6.
E. P.
Pevtsov
, E. G.
Elkin
, and M. A.
Pospelova
, Proc. SPIE-Int. Soc. Opt. Am.
3200
, 179
(1997
).7.
H.
Funakoshi
, A.
Okamoto
, and J. K.
Sato
, Mod. Opt.
52
, 1511
(2005
).8.
H. J.
Queisser
and D. E.
Theodorou
, Phys. Rev. Lett.
43
, 401
(1979
).9.
J. Z.
Li
, J. Y.
Lin
, H. X.
Jiang
, M. Asif
Khan
, and Q.
Chen
, J. Appl. Phys.
82
, 1227
(1997
).10.
R.
Calarco
, M.
Marso
, T.
Richter
, I. A.
Aykanat
, R.
Meijers
, A. v. d.
Hart
, T.
Stoica
, and H.
Lüth
, Nano Lett.
5
, 981
(2005
).11.
P.
Feng
, I.
Monch
, S.
Harazim
, G.
Huang
, Y.
Mei
, and G. O.
Schmidt
, Nano Lett.
9
, 3453
(2009
).12.
A.
Tebano
, E.
Fabbri
, D.
Pergolesi
, G.
Balestrino
, and E.
Traversa
, ACS Nano
6
, 1278
(2012
).13.
M. C.
Tarun
, F. A.
Selim
, and M. D.
McCluskey
, Phys. Rev. Lett.
111
, 187403
(2013
).14.
A.
Dixit
, R. P.
Panguluri
, C.
Sudakar
, P.
Kharel
, P.
Thapa
, I.
Avrutsky
, R.
Naik
, G.
Lawes
, and B.
Nadgorny
, Appl. Phys. Lett.
94
, 252105
(2009
).15.
T.
Tanabe
, M.
Notomi
, S.
Mitsugi
, A.
Shinya
, and E.
Kuramochi
, Opt. Lett.
30
, 2575
(2005
).16.
Y. M.
Liu
, E.
Chen
, and Y. S.
Chou
, Appl. Phys. Lett.
65
, 887
(1994
).17.
K. A.
Sharma
, C. P.
Logofãtu
, S. C.
Mayberry
, J. R. S.
Brueck
, and J. N. E.
Islam
, Appl. Phys.
101
, 104914
(2007
).18.
S.
Cai
, G.
Parish
, J. M.
Dell
, and B. D.
Nener
, J. Appl. Phys.
96
, 1019
(2004
).19.
K.
Rasool
, M. A.
Rafiq
, M.
Ahmad
, Z.
Imran
, and M. M.
Hasan
, Appl. Phys. Lett.
101
, 253104
(2012
).20.
A.
Tighineanu
, T.
Ruff
, S. P.
Albu
, R.
Hahn
, and P.
Schmuki
, Chem. Phys. Lett.
494
, 260
(2010
).21.
P.
Roy
, D.
Kim
, K.
Lee
, E.
Spiecker
, and P.
Schmuki
, Nanoscale
2
, 45
(2010
).22.
S.
Manafi
, M. R.
Rahimipour
, I.
Mobasherpour
, and A.
Soltanmoradi
, Int. J. Nano Dimension
3
, 163
(2010
).23.
N. J.
Joshi
, G. S.
Grewal
, V.
Shrinet
, A.
Pratap
, and N. J.
Buchi
, Int. Ferroelectrics
115
, 142
(2010
).24.
G. A.
Tompsett
, G. A.
Bowmaker
, R. P.
Cooney
, J. B.
Metson
, K. A.
Rodgers
, and J. M.
Seakins
, J. Raman Spectrosc.
26
, 57
(1995
).25.
L. R.
Brutchey
and E. D.
Morse
, Angew. Chem. Int. Ed.
45
, 6564
(2006
).26.
A.
Gajović
, J. V.
Pleština
, K.
Žagar
, M.
Plodinec
, S.
Šturm
, and M.
Čeh
, J. Raman Spectrosc.
44
, 412
(2013
).27.
R.
Li
, Q.
Li
, L.
Zong
, X.
Wang
, and J.
Yang
, Electrochim. Acta
91
, 30
(2013
).28.
S.
Burnside
, J.-E.
Moser
, K.
Brooks
, and M.
Grätzel
, J. Phys. Chem. B
103
, 9328
(1999
).29.
30.
N.
Chan
, K. R.
Sharma
, and M. D.
Smyth
, Am. Ceram. Soc.
64
, 556
(1981
).31.
M.
Cardona
, Phys. Rev.
140
, A651
(1965
).32.
P.
Buchmant
, Solid State Elec.
11
, 767
–772
(1968
).33.
S. J.
Chung
, O. H.
Cha
, Y. S.
Kim
, M. S.
Jeong
, C.-H.
Hong
, H. J.
Lee
, M. S.
Jeong
, J. O.
White
, and E.-K.
Suh
, J. Appl. Phys.
89
, 5454
(2001
).34.
J.
Luo
, A. U.
Adler
, T. O.
Mason
, D. B.
Buchholz
, R. P. H.
Chang
, and M.
Grayson
, J. Appl. Phys.
113
, 153709
(2013
).© 2014 AIP Publishing LLC.
2014
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