Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells

Jin Soo Kang, Hyelim Choi, Jin Kim, Hyeji Park, Jae Yup Kim, Jung Woo Choi, Seung-Ho Yu, Kyung Jae Lee, Yun Sik Kang, Sun Ha Park, Yong Hun Cho, Jun Ho Yum, David C. Dunand, Heeman Choe, Yung Eun Sung

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Mesoscopic solar cells based on nanostructured oxide semiconductors are considered as a promising candidates to replace conventional photovoltaics employing costly materials. However, their overall performances are below the sufficient level required for practical usages. Herein, this study proposes an anodized Ti foam (ATF) with multidimensional and hierarchical architecture as a highly efficient photoelectrode for the generation of a large photocurrent. ATF photoelectrodes prepared by electrochemical anodization of freeze-cast Ti foams have three favorable characteristics: (i) large surface area for enhanced light harvesting, (ii) 1D semiconductor structure for facilitated charge collection, and (iii) 3D highly conductive metallic current collector that enables exclusion of transparent conducting oxide substrate. Based on these advantages, when ATF is utilized in dye-sensitized solar cells, short-circuit photocurrent density up to 22.0 mA cm−2 is achieved in the conventional N719 dye-I3 /I redox electrolyte system even with an intrinsically inferior quasi-solid electrolyte.

Original languageEnglish
Article number1701458
JournalSmall
Volume13
Issue number34
DOIs
Publication statusPublished - 2017 Sep 13
Externally publishedYes

Keywords

  • anodization
  • metal foams
  • solar cells
  • titanium dioxide

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

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  • Cite this

    Kang, J. S., Choi, H., Kim, J., Park, H., Kim, J. Y., Choi, J. W., Yu, S-H., Lee, K. J., Kang, Y. S., Park, S. H., Cho, Y. H., Yum, J. H., Dunand, D. C., Choe, H., & Sung, Y. E. (2017). Multidimensional Anodized Titanium Foam Photoelectrode for Efficient Utilization of Photons in Mesoscopic Solar Cells. Small, 13(34), [1701458]. https://doi.org/10.1002/smll.201701458