Template-directed fabrication of vertically aligned Cu2ZnSnS4nanorod arrays for photoelectrochemical applications via a non-toxic solution process

Jimin Kim, Wooseok Yang, Yunjung Oh, Joosun Kim, Jooho Moon

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Cu2ZnSnS4(CZTS), which is non-toxic and abundantly available, is a promising material for fabricating inexpensive large-scale photoelectrochemical (PEC) devices. With the current rapid developments in nanotechnology, one-dimensional (1D) semiconductor nanostructures have been widely investigated because of their short transport distance for photogenerated carriers, large specific surface areas, and efficient optical absorption, all of which are advantageous features. However, PEC devices based on vertical arrays of 1D CZTS nanostructures have not yet been realized. In this study, we report the fabrication of vertically aligned CZTS nanorod arrays using an anodic aluminum oxide template-assisted solution process. The nanorods exhibit a relatively pure phase with a CZTS kesterite structure and cathodic photocurrent response. The surfaces of the CZTS nanorod arrays were decorated with either ZnS or CdS via chemical bath deposition to increase the photocurrent with a positive flat band potential. By analyzing the photocurrent and flat band potential, we gained an insight into the effect of band alignment between the p-type CZTS and the n-type material.

Original languageEnglish
Pages (from-to)457-465
Number of pages9
JournalJournal of Alloys and Compounds
Volume691
DOIs
Publication statusPublished - 2017 Jan 1

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All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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