In2O3:Sn/TiO2/CdS heterojunction nanowire array photoanode in photoelectrochemical cells

Ju Seong Kim, Hyun Soo Han, Sun Shin, Gill Sang Han, Hyun Suk Jung, Kug Sun Hong, Jun Hong Noh

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


The design of photoanode with highly efficient light harvesting and charge collection properties is important in photoelectrochemical (PEC) cell performance for hydrogen production. Here, we report the hierarchical In2O3:Sn/TiO2/CdS heterojunction nanowire array photoanode (ITO/TiO2/CdS-nanowire array photoanode) as it provides a short travel distance for charge carrier and long light absorption pathway by scattering effect. In addition, optical properties and device performance of the ITO/TiO2/CdS-nanowire array photoanode were compared with the TiO2 nanoparticle/CdS photoanode. The photocatalytic properties for water splitting were measured in the presence of sacrificial agent such as SO32- and S2- ions. Under illumination (AM 1.5G, 100 mW/cm2), ITO/TiO2/CdS-nanowire array photoanode exhibits a photocurrent density of 8.36 mA/cm2 at 0 V versus Ag/AgCl, which is four times higher than the TiO2 nanoparticle/CdS photoanode. The maximum applied bias photon-to-current efficiency for the ITO/TiO2/CdS-nanowire array and the TiO2 nanoparticle/CdS photoanode were 3.33% and 2.09%, respectively. The improved light harvesting and the charge collection properties due to the increased light absorption pathway and reduced electron travel distance by ITO nanowire lead to enhancement of PEC performance.

Original languageEnglish
Pages (from-to)17473-17480
Number of pages8
JournalInternational Journal of Hydrogen Energy
Issue number30
Publication statusPublished - 2014 Oct 13
Externally publishedYes

Bibliographical note

Funding Information:
This work was supported by the Global Frontier R&D Program on Center for Multiscale Energy System funded by the National Research Foundation under the Ministry of Education, Science and Technology, Korea ( 2012-054871 ) and the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) ( 2012-0008669 ). This work was also supported by the industrial strategic technology development program (10041031, Development of non-vacuum and non-lithography based 5 μm width Cu interconnect technology for TFT backplane) funded by the Ministry of Knowledge Economy (MKE, Korea).

Publisher Copyright:
© 2013 Hydrogen Energy Publications, LLC.


  • CdS
  • Charge collection
  • ITO nanowire (InO:Sn)
  • Light harvesting
  • Nanowire
  • Photoelectrochemical cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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