CoAl2O4-Fe2O3 p-n Nanocomposite Electrodes for Photoelectrochemical Cells

Kwang Soon Ahn; Yanfa Yan; Moon Sung Kang; Jin Young Kim; Sudhakar Shet; Heli Wang; John Turner; Mowafak Al-Jassim

doi:10.1063/1.3183585

CoAl2O4-Fe2O3 p-n Nanocomposite Electrodes for Photoelectrochemical Cells

Kwang Soon Ahn, Yanfa Yan, Moon Sung Kang, Jin Young Kim, Sudhakar Shet, Heli Wang, John Turner, Mowafak Al-Jassim

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

48 Scopus Citations

Abstract

CoAl₂O₄ - Fe₂ O₃ p-n nanocomposite electrodes were deposited on Ag-coated stainless-steel substrates and annealed at 800 °C. Their photoelectrochemical (PEC) properties were investigated and compared with that of p -type CoAl₂ O₄ films. We found that the nanocomposite electrodes exhibit much improved PEC photoresponse as compared to the reference p -type CoAl₂ O ₄ electrodes. We speculate that the enhancement is due to the formation of a three-dimensional junction between p -type CoAl₂ O₄ and n -type Fe₂ O₃ nanoparticles, which improves electron-hole separation, thus reducing charge recombination upon light illumination.

Original language	American English
Article number	Article No. 022116
Number of pages	3
Journal	Applied Physics Letters
Volume	95
Issue number	2
DOIs	https://doi.org/10.1063/1.3183585 https://doi.org/10.1063/1.3183585
State	Published - 2009

NREL Publication Number

NREL/JA-520-45838

Keywords

coal
electrodes
nanocomposites
nanoparticles
ozone

Access to Document

Cite this

@article{9ab46c8bb3e346b9ae5588137900a409,

title = "CoAl2O4-Fe2O3 p-n Nanocomposite Electrodes for Photoelectrochemical Cells",

abstract = "CoAl2O4 - Fe2 O3 p-n nanocomposite electrodes were deposited on Ag-coated stainless-steel substrates and annealed at 800 °C. Their photoelectrochemical (PEC) properties were investigated and compared with that of p -type CoAl2 O4 films. We found that the nanocomposite electrodes exhibit much improved PEC photoresponse as compared to the reference p -type CoAl2 O 4 electrodes. We speculate that the enhancement is due to the formation of a three-dimensional junction between p -type CoAl2 O4 and n -type Fe2 O3 nanoparticles, which improves electron-hole separation, thus reducing charge recombination upon light illumination.",

keywords = "coal, electrodes, nanocomposites, nanoparticles, ozone",

author = "Ahn, {Kwang Soon} and Yanfa Yan and Kang, {Moon Sung} and Kim, {Jin Young} and Sudhakar Shet and Heli Wang and John Turner and Mowafak Al-Jassim",

year = "2009",

doi = "10.1063/1.3183585",

language = "American English",

volume = "95",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "2",

}

TY - JOUR

T1 - CoAl2O4-Fe2O3 p-n Nanocomposite Electrodes for Photoelectrochemical Cells

AU - Ahn, Kwang Soon

AU - Yan, Yanfa

AU - Kang, Moon Sung

AU - Kim, Jin Young

AU - Shet, Sudhakar

AU - Wang, Heli

AU - Turner, John

AU - Al-Jassim, Mowafak

PY - 2009

Y1 - 2009

N2 - CoAl2O4 - Fe2 O3 p-n nanocomposite electrodes were deposited on Ag-coated stainless-steel substrates and annealed at 800 °C. Their photoelectrochemical (PEC) properties were investigated and compared with that of p -type CoAl2 O4 films. We found that the nanocomposite electrodes exhibit much improved PEC photoresponse as compared to the reference p -type CoAl2 O 4 electrodes. We speculate that the enhancement is due to the formation of a three-dimensional junction between p -type CoAl2 O4 and n -type Fe2 O3 nanoparticles, which improves electron-hole separation, thus reducing charge recombination upon light illumination.

AB - CoAl2O4 - Fe2 O3 p-n nanocomposite electrodes were deposited on Ag-coated stainless-steel substrates and annealed at 800 °C. Their photoelectrochemical (PEC) properties were investigated and compared with that of p -type CoAl2 O4 films. We found that the nanocomposite electrodes exhibit much improved PEC photoresponse as compared to the reference p -type CoAl2 O 4 electrodes. We speculate that the enhancement is due to the formation of a three-dimensional junction between p -type CoAl2 O4 and n -type Fe2 O3 nanoparticles, which improves electron-hole separation, thus reducing charge recombination upon light illumination.

KW - coal

KW - electrodes

KW - nanocomposites

KW - nanoparticles

KW - ozone

UR - http://www.scopus.com/inward/record.url?scp=67650714657&partnerID=8YFLogxK

U2 - 10.1063/1.3183585

DO - 10.1063/1.3183585

M3 - Article

AN - SCOPUS:67650714657

SN - 0003-6951

VL - 95

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - Article No. 022116

ER -

CoAl2O4-Fe2O3 p-n Nanocomposite Electrodes for Photoelectrochemical Cells

Abstract

NREL Publication Number

Keywords

Access to Document

Other files and links

Fingerprint

Cite this