Adjusting the Anisotropy of 1D Sb2Se3 Nanostructures for Highly Efficient Photoelectrochemical Water Splitting

Wooseok Yang, Jihoon Ahn, Yunjung Oh, Jeiwan Tan, Hyungsoo Lee, Jaemin Park, Hyeok Chan Kwon, Juran Kim, William Jo, Joosun Kim, Jooho Moon

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Sb2Se3 has recently spurred great interest as a promising light-absorbing material for solar energy conversion. Sb2Se3 consists of 1D covalently linked nanoribbons stacked via van der Waals forces and its properties strongly depend on the crystallographic orientation. However, strategies for adjusting the anisotropy of 1D Sb2Se3 nanostructures are rarely investigated. Here, a novel approach is presented to fabricate 1D Sb2Se3 nanostructure arrays with different aspect ratios on conductive substrates by simply spin-coating Sb-Se solutions with different molar ratios of thioglycolic acid and ethanolamine. A relatively small proportion of thioglycolic acid induces the growth of short Sb2Se3 nanorod arrays with preferred orientation, leading to fast carrier transport and enhanced photocurrent. After the deposition of TiO2 and Pt, an appropriately oriented Sb2Se3 nanostructure array exhibits a significantly enhanced photoelectrochemical performance; the photocurrent reaches 12.5 mA cm−2 at 0 V versus reversible hydrogen electrode under air mass 1.5 global illumination.

Original languageEnglish
Article number1702888
JournalAdvanced Energy Materials
Volume8
Issue number14
DOIs
Publication statusPublished - 2018 May 15

All Science Journal Classification (ASJC) codes

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

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