Transparent-conducting-oxide nanowire arrays for efficient photoelectrochemical energy conversion

Sangwook Lee, Sangbaek Park, Gill San Han, Dong Hoe Kim, Jun Hong Noh, In Sun Cho, Hyun Suk Jung, Kug Sun Hong

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We report one dimensional (1-D) transparent-conducting-oxide arrays coated with light-absorbing semiconductors to simultaneously maximize light harvesting and charge collection in a photoelectrochemical (PEC) system. Tin-doped indium oxide (ITO) nanowire (NW) arrays are prepared on ITO thin-film substrates as the transparent-conducting-oxide, and TiO 2 or CdSe/CdS/TiO 2 thin layers were coated on the ITO NW arrays as the solar light-absorbing layers. The optimal PEC performance, 0.85% under 100 mW cm -2 of light illumination, is obtained from ∼30 μm-long ITO NW, which is covered with ∼20 nm-thick TiO 2 nanoshell. We finally demonstrate that the ITO NW-based photoelectrode is also compatible with one of the most efficient visible-light sensitizers, the CdS/CdSe quantum dot. Our approach using the transparent conducting 1-D array has wide potential to improve the PEC performances of conventional semiconducting materials through liberation from the poor charge transport. This journal is

Original languageEnglish
Pages (from-to)8649-8655
Number of pages7
JournalNanoscale
Volume6
Issue number15
DOIs
Publication statusPublished - 2014 Aug 7
Externally publishedYes

ASJC Scopus subject areas

  • Materials Science(all)

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    Lee, S., Park, S., Han, G. S., Kim, D. H., Noh, J. H., Cho, I. S., Jung, H. S., & Hong, K. S. (2014). Transparent-conducting-oxide nanowire arrays for efficient photoelectrochemical energy conversion. Nanoscale, 6(15), 8649-8655. https://doi.org/10.1039/c4nr02298j