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Spatially Resolved Photodetection in Leaky Ferroelectric BiFeO 3
Author(s) -
Lee WonMo,
Sung Ji Ho,
Chu Kanghyun,
Moya Xavier,
Lee Donghun,
Kim CheolJoo,
Mathur Neil D.,
Cheong S.W.,
Yang C.H.,
Jo MoonHo
Publication year - 2012
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201102816
Subject(s) - ferroelectricity , photocurrent , photodetection , materials science , polarization (electrochemistry) , optoelectronics , photovoltaic effect , piezoresponse force microscopy , photoconductivity , optics , condensed matter physics , photodetector , physics , chemistry , dielectric , photovoltaic system , ecology , biology
Potential gradients due to the spontaneous polarization of BiFeO 3 yield asymmetric and nonlinear photocarrier dynamics. Photocurrent direction is determined by local ferroelectric domain orientation, whereas magnitude is spectrally centered around charged domain walls that are associated with oxygen vacancy migration. Photodetection can be electrically controlled by manipulating ferroelectric domain configurations.