Self-oriented Sb 2 Se 3 nanoneedle photocathodes for water splitting obtained by a simple spin-coating method

Jimin Kim, Wooseok Yang, Yunjung Oh, Hyungsoo Lee, Seonhee Lee, Hyunjung Shin, Joosun Kim, Joo Ho Moon

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Synthesis of one-dimensional nanostructured chalcogenide compounds using nontoxic and abundant constituents provides an important pathway to the development of commercially feasible photoelectrochemical water splitting. In this study, grass-like Sb 2 Se 3 nanoneedle arrays are successfully fabricated on a substrate via a facile spin-coating method without any complicated processes such as templating, seed formation, or use of a vapor phase. Preferential [001] growth of the initial single-crystalline Sb 2 Se 3 occurs during the first spin-coating, but interfacial defects are generated upon subsequent spin-coating iterations, resulting in annual-ring-like growth of Sb 2 Se 3 nanoneedles. After sequential surface modification with TiO 2 and Pt, the resistance to charge transfer from the photoelectrode to the electrolyte decreases significantly, yielding a remarkable record-high photocurrent of 2 mA cm -2 at 0 V RHE (4.5 mA cm -2 at -0.2 V RHE ).

Original languageEnglish
Pages (from-to)2180-2187
Number of pages8
JournalJournal of Materials Chemistry A
Volume5
Issue number5
DOIs
Publication statusPublished - 2017 Jan 1

Fingerprint

Nanoneedles
Photocathodes
Spin coating
Water
Photocurrents
Electrolytes
Seed
Surface treatment
Charge transfer
Vapors
Crystalline materials
Defects
Substrates

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

Kim, Jimin ; Yang, Wooseok ; Oh, Yunjung ; Lee, Hyungsoo ; Lee, Seonhee ; Shin, Hyunjung ; Kim, Joosun ; Moon, Joo Ho. / Self-oriented Sb 2 Se 3 nanoneedle photocathodes for water splitting obtained by a simple spin-coating method In: Journal of Materials Chemistry A. 2017 ; Vol. 5, No. 5. pp. 2180-2187.
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Self-oriented Sb 2 Se 3 nanoneedle photocathodes for water splitting obtained by a simple spin-coating method . / Kim, Jimin; Yang, Wooseok; Oh, Yunjung; Lee, Hyungsoo; Lee, Seonhee; Shin, Hyunjung; Kim, Joosun; Moon, Joo Ho.

In: Journal of Materials Chemistry A, Vol. 5, No. 5, 01.01.2017, p. 2180-2187.

Research output: Contribution to journalArticle

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AU - Kim, Jimin

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AU - Lee, Seonhee

AU - Shin, Hyunjung

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AU - Moon, Joo Ho

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