Enhanced photo-collection in single BiFeO3 nanowire due to carrier separation from radial surface field

K. Prashanthi; P. Dhandharia; N. Miriyala; R. Gaikwad; D. Barlage; T. Thundat

doi:10.1016/j.nanoen.2015.02.014

Enhanced photo-collection in single BiFeO₃ nanowire due to carrier separation from radial surface field

K. Prashanthi
, P. Dhandharia
, N. Miriyala
, R. Gaikwad
, D. Barlage
, T. Thundat

Department of Chemical and Biological Engineering

University at Buffalo

University of Alberta

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Enhanced photo-collection and increased carrier lifetimes in semiconductor BiFeO₃ (BFO) single nanowire under visible illumination have been reported in this paper. As a direct result of radial surface potential due to Fermi level pinning caused by high density of surface states in BFO nanowire, a highly efficient carrier separation has been observed. The measured carrier lifetimes in BFO nanowire are three orders magnitude higher than the reported values in bulk. We have obtained the equilibrium carrier concentration ~5.4×10¹⁷/cm³ and assumed a mobility value ~3cm²(V/s) at room temperature in the BFO nanowire. We believe that BFO nanowires with visible photo-response and long carrier life time are promising for nanoscale optoelectronic applications.

Original language	English
Pages (from-to)	240-248
Number of pages	9
Journal	Nano Energy
Volume	13
DOIs	https://doi.org/10.1016/j.nanoen.2015.02.014
State	Published - Apr 1 2015

Keywords

BiFeO
Carrier lifetime
Fermi-level pinning
Nanowires
Photoresponse
Surface states

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10.1016/j.nanoen.2015.02.014

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title = "Enhanced photo-collection in single BiFeO3 nanowire due to carrier separation from radial surface field",

abstract = "Enhanced photo-collection and increased carrier lifetimes in semiconductor BiFeO3 (BFO) single nanowire under visible illumination have been reported in this paper. As a direct result of radial surface potential due to Fermi level pinning caused by high density of surface states in BFO nanowire, a highly efficient carrier separation has been observed. The measured carrier lifetimes in BFO nanowire are three orders magnitude higher than the reported values in bulk. We have obtained the equilibrium carrier concentration \textasciitilde{}5.4×1017/cm3 and assumed a mobility value \textasciitilde{}3cm2(V/s) at room temperature in the BFO nanowire. We believe that BFO nanowires with visible photo-response and long carrier life time are promising for nanoscale optoelectronic applications.",

keywords = "BiFeO, Carrier lifetime, Fermi-level pinning, Nanowires, Photoresponse, Surface states",

author = "K. Prashanthi and P. Dhandharia and N. Miriyala and R. Gaikwad and D. Barlage and T. Thundat",

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T1 - Enhanced photo-collection in single BiFeO3 nanowire due to carrier separation from radial surface field

AU - Prashanthi, K.

AU - Dhandharia, P.

AU - Miriyala, N.

AU - Gaikwad, R.

AU - Barlage, D.

AU - Thundat, T.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Enhanced photo-collection and increased carrier lifetimes in semiconductor BiFeO3 (BFO) single nanowire under visible illumination have been reported in this paper. As a direct result of radial surface potential due to Fermi level pinning caused by high density of surface states in BFO nanowire, a highly efficient carrier separation has been observed. The measured carrier lifetimes in BFO nanowire are three orders magnitude higher than the reported values in bulk. We have obtained the equilibrium carrier concentration ~5.4×1017/cm3 and assumed a mobility value ~3cm2(V/s) at room temperature in the BFO nanowire. We believe that BFO nanowires with visible photo-response and long carrier life time are promising for nanoscale optoelectronic applications.

AB - Enhanced photo-collection and increased carrier lifetimes in semiconductor BiFeO3 (BFO) single nanowire under visible illumination have been reported in this paper. As a direct result of radial surface potential due to Fermi level pinning caused by high density of surface states in BFO nanowire, a highly efficient carrier separation has been observed. The measured carrier lifetimes in BFO nanowire are three orders magnitude higher than the reported values in bulk. We have obtained the equilibrium carrier concentration ~5.4×1017/cm3 and assumed a mobility value ~3cm2(V/s) at room temperature in the BFO nanowire. We believe that BFO nanowires with visible photo-response and long carrier life time are promising for nanoscale optoelectronic applications.

KW - BiFeO

KW - Carrier lifetime

KW - Fermi-level pinning

KW - Nanowires

KW - Photoresponse

KW - Surface states

UR - https://www.scopus.com/pages/publications/84924545701

U2 - 10.1016/j.nanoen.2015.02.014

DO - 10.1016/j.nanoen.2015.02.014

M3 - Article

SN - 2211-2855

VL - 13

SP - 240

EP - 248

JO - Nano Energy

JF - Nano Energy

ER -

Enhanced photo-collection in single BiFeO₃ nanowire due to carrier separation from radial surface field

Abstract

Keywords

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