Self-oriented Sb2Se3 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, Jooho Moon

Research output: Contribution to journalArticle

40 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 Sb2Se3 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 Sb2Se3 occurs during the first spin-coating, but interfacial defects are generated upon subsequent spin-coating iterations, resulting in annual-ring-like growth of Sb2Se3 nanoneedles. After sequential surface modification with TiO2 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 VRHE (4.5 mA cm-2 at -0.2 VRHE).

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

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All Science Journal Classification (ASJC) codes

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

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