Synthesis of transparent mesoporous tungsten trioxide films with enhanced photoelectrochemical response: Application to unassisted solar water splitting

Jung Kyu Kim, Kahee Shin, Sung M. Cho, Tae Woo Lee, Jong Hyeok Park

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

Tungsten trioxide (WO3) films with a mesoporous morphology, high transparency, and monoclinic phase crystallinity were prepared using polyethyleneglycol (PEG) as a surfactant and their photoelectrochemical properties were measured. By controlling the weight ratio of the tungsten precursor to PEG, a sphere-like WO3 nanoparticle film with high transparency can be synthesized. The photocurrent responses of the films under 1 sun solar light illumination were measured. Due to the high transparency of the WO3 photoanode, it is possible to fabricate a tandem cell composed of a WO3/Pt bipolar electrode connected with a dye-sensitized solar cell. Unassisted water splitting from the tandem cell was demonstrated but the maximum current density was exhibited at around +0.4 V (vs. Pt).

Original languageEnglish
Pages (from-to)1465-1470
Number of pages6
JournalEnergy and Environmental Science
Volume4
Issue number4
DOIs
Publication statusPublished - 2011 Apr

All Science Journal Classification (ASJC) codes

  • Environmental Chemistry
  • Renewable Energy, Sustainability and the Environment
  • Nuclear Energy and Engineering
  • Pollution

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