Indium-Tin-Oxide Nanowire Array Based CdSe/CdS/TiO2 One-Dimensional Heterojunction Photoelectrode for Enhanced Solar Hydrogen Production

Hyun Soo Han; Gill Sang Han; Ju Seong Kim; Dong Hoe Kim; Jung Sug Hong; Salim Caliskan; Hyun Suk Jung; In Sun Cho; Jung Kun Lee

doi:10.1021/acssuschemeng.5b01229

Indium-Tin-Oxide Nanowire Array Based CdSe/CdS/TiO₂ One-Dimensional Heterojunction Photoelectrode for Enhanced Solar Hydrogen Production

Hyun Soo Han, Gill Sang Han, Ju Seong Kim, Dong Hoe Kim, Jung Sug Hong, Salim Caliskan, Hyun Suk Jung, In Sun Cho, Jung Kun Lee

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

31 Citations (Scopus)

Abstract

For photoelectrochemical (PEC) hydrogen production, low charge transport efficiency of a photoelectrode is one of the key factors that largely limit PEC performance enhancement. Here, we report a tin-doped indium oxide (In₂O₃:Sn, ITO) nanowire array (NWs) based CdSe/CdS/TiO₂ multishelled heterojunction photoelectrode. This multishelled one-dimensional (1D) heterojunction photoelectrode shows superior charge transport efficiency due to the negligible carrier recombination in ITO NWs, leading to a greatly improved photocurrent density (∼16.2 mA/cm² at 1.0 V vs RHE). The ITO NWs with an average thickness of ∼12 μm are first grown on commercial ITO/glass substrate by a vapor-liquid-solid method. Subsequently, the TiO₂ and CdSe/CdS shell layers are deposited by an atomic layer deposition (ALD) and a chemical bath deposition method, respectively. The resultant CdSe/CdS/TiO₂/ITO NWs photoelectrode, compared to a planar structure with the same configuration, shows improved light absorption and much faster charge transport properties. More importantly, even though the CdSe/CdS/TiO₂/ITO NWs photoelectrode has lower CdSe/CdS loading (i.e., due to its lower surface area) than the mesoporous TiO₂ nanoparticle based photoelectrode, it shows 2.4 times higher saturation photocurrent density, which is attributed to the superior charge transport and better light absorption by the 1D ITO NWs.

Original language	English
Pages (from-to)	1161-1168
Number of pages	8
Journal	ACS Sustainable Chemistry and Engineering
Volume	4
Issue number	3
DOIs	https://doi.org/10.1021/acssuschemeng.5b01229
Publication status	Published - 2016 Mar 7
Externally published	Yes

Bibliographical note

Funding Information:
J.-K.L. acknowledges the support from National Science Foundation (Grant No. CMMI-1333182, EPMD-1408025) and the Global Frontier R&D Program on Center for Multiscale Energy System, Korea (2012M3A6A7054855). I.S.C. also acknowledges the support from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2015R1C1A1A01053785).

Publisher Copyright:
© 2016 American Chemical Society.

Keywords

1D transparent conducting oxides
CdSe/CdS/TiO heterojunction
Charge transport
InO:Sn nanowire array
Photoelectrochemical hydrogen production

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry
Chemical Engineering(all)
Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acssuschemeng.5b01229

Cite this

@article{c563270bdb20436b818c62aaf858bd7a,

title = "Indium-Tin-Oxide Nanowire Array Based CdSe/CdS/TiO2 One-Dimensional Heterojunction Photoelectrode for Enhanced Solar Hydrogen Production",

abstract = "For photoelectrochemical (PEC) hydrogen production, low charge transport efficiency of a photoelectrode is one of the key factors that largely limit PEC performance enhancement. Here, we report a tin-doped indium oxide (In2O3:Sn, ITO) nanowire array (NWs) based CdSe/CdS/TiO2 multishelled heterojunction photoelectrode. This multishelled one-dimensional (1D) heterojunction photoelectrode shows superior charge transport efficiency due to the negligible carrier recombination in ITO NWs, leading to a greatly improved photocurrent density (∼16.2 mA/cm2 at 1.0 V vs RHE). The ITO NWs with an average thickness of ∼12 μm are first grown on commercial ITO/glass substrate by a vapor-liquid-solid method. Subsequently, the TiO2 and CdSe/CdS shell layers are deposited by an atomic layer deposition (ALD) and a chemical bath deposition method, respectively. The resultant CdSe/CdS/TiO2/ITO NWs photoelectrode, compared to a planar structure with the same configuration, shows improved light absorption and much faster charge transport properties. More importantly, even though the CdSe/CdS/TiO2/ITO NWs photoelectrode has lower CdSe/CdS loading (i.e., due to its lower surface area) than the mesoporous TiO2 nanoparticle based photoelectrode, it shows 2.4 times higher saturation photocurrent density, which is attributed to the superior charge transport and better light absorption by the 1D ITO NWs.",

keywords = "1D transparent conducting oxides, CdSe/CdS/TiO heterojunction, Charge transport, InO:Sn nanowire array, Photoelectrochemical hydrogen production",

author = "Han, {Hyun Soo} and Han, {Gill Sang} and Kim, {Ju Seong} and Kim, {Dong Hoe} and Hong, {Jung Sug} and Salim Caliskan and Jung, {Hyun Suk} and Cho, {In Sun} and Lee, {Jung Kun}",

note = "Funding Information: J.-K.L. acknowledges the support from National Science Foundation (Grant No. CMMI-1333182, EPMD-1408025) and the Global Frontier R&D Program on Center for Multiscale Energy System, Korea (2012M3A6A7054855). I.S.C. also acknowledges the support from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2015R1C1A1A01053785). Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

year = "2016",

month = mar,

day = "7",

doi = "10.1021/acssuschemeng.5b01229",

language = "English",

volume = "4",

pages = "1161--1168",

journal = "ACS Sustainable Chemistry and Engineering",

issn = "2168-0485",

publisher = "American Chemical Society",

number = "3",

}

TY - JOUR

T1 - Indium-Tin-Oxide Nanowire Array Based CdSe/CdS/TiO2 One-Dimensional Heterojunction Photoelectrode for Enhanced Solar Hydrogen Production

AU - Han, Hyun Soo

AU - Han, Gill Sang

AU - Kim, Ju Seong

AU - Kim, Dong Hoe

AU - Hong, Jung Sug

AU - Caliskan, Salim

AU - Jung, Hyun Suk

AU - Cho, In Sun

AU - Lee, Jung Kun

N1 - Funding Information: J.-K.L. acknowledges the support from National Science Foundation (Grant No. CMMI-1333182, EPMD-1408025) and the Global Frontier R&D Program on Center for Multiscale Energy System, Korea (2012M3A6A7054855). I.S.C. also acknowledges the support from Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (2015R1C1A1A01053785). Publisher Copyright: © 2016 American Chemical Society.

PY - 2016/3/7

Y1 - 2016/3/7

N2 - For photoelectrochemical (PEC) hydrogen production, low charge transport efficiency of a photoelectrode is one of the key factors that largely limit PEC performance enhancement. Here, we report a tin-doped indium oxide (In2O3:Sn, ITO) nanowire array (NWs) based CdSe/CdS/TiO2 multishelled heterojunction photoelectrode. This multishelled one-dimensional (1D) heterojunction photoelectrode shows superior charge transport efficiency due to the negligible carrier recombination in ITO NWs, leading to a greatly improved photocurrent density (∼16.2 mA/cm2 at 1.0 V vs RHE). The ITO NWs with an average thickness of ∼12 μm are first grown on commercial ITO/glass substrate by a vapor-liquid-solid method. Subsequently, the TiO2 and CdSe/CdS shell layers are deposited by an atomic layer deposition (ALD) and a chemical bath deposition method, respectively. The resultant CdSe/CdS/TiO2/ITO NWs photoelectrode, compared to a planar structure with the same configuration, shows improved light absorption and much faster charge transport properties. More importantly, even though the CdSe/CdS/TiO2/ITO NWs photoelectrode has lower CdSe/CdS loading (i.e., due to its lower surface area) than the mesoporous TiO2 nanoparticle based photoelectrode, it shows 2.4 times higher saturation photocurrent density, which is attributed to the superior charge transport and better light absorption by the 1D ITO NWs.

AB - For photoelectrochemical (PEC) hydrogen production, low charge transport efficiency of a photoelectrode is one of the key factors that largely limit PEC performance enhancement. Here, we report a tin-doped indium oxide (In2O3:Sn, ITO) nanowire array (NWs) based CdSe/CdS/TiO2 multishelled heterojunction photoelectrode. This multishelled one-dimensional (1D) heterojunction photoelectrode shows superior charge transport efficiency due to the negligible carrier recombination in ITO NWs, leading to a greatly improved photocurrent density (∼16.2 mA/cm2 at 1.0 V vs RHE). The ITO NWs with an average thickness of ∼12 μm are first grown on commercial ITO/glass substrate by a vapor-liquid-solid method. Subsequently, the TiO2 and CdSe/CdS shell layers are deposited by an atomic layer deposition (ALD) and a chemical bath deposition method, respectively. The resultant CdSe/CdS/TiO2/ITO NWs photoelectrode, compared to a planar structure with the same configuration, shows improved light absorption and much faster charge transport properties. More importantly, even though the CdSe/CdS/TiO2/ITO NWs photoelectrode has lower CdSe/CdS loading (i.e., due to its lower surface area) than the mesoporous TiO2 nanoparticle based photoelectrode, it shows 2.4 times higher saturation photocurrent density, which is attributed to the superior charge transport and better light absorption by the 1D ITO NWs.

KW - 1D transparent conducting oxides

KW - CdSe/CdS/TiO heterojunction

KW - Charge transport

KW - InO:Sn nanowire array

KW - Photoelectrochemical hydrogen production

UR - http://www.scopus.com/inward/record.url?scp=84960172435&partnerID=8YFLogxK

U2 - 10.1021/acssuschemeng.5b01229

DO - 10.1021/acssuschemeng.5b01229

M3 - Article

AN - SCOPUS:84960172435

SN - 2168-0485

VL - 4

SP - 1161

EP - 1168

JO - ACS Sustainable Chemistry and Engineering

JF - ACS Sustainable Chemistry and Engineering

IS - 3

ER -