Comparative Study on the Photoanode Nanoarchitectures for Photovoltaic Application

Jin Ah Lee, Jae Yup Kim, Woong Kim, Soon Hyung Kang, Min Jae Ko

Research output: Contribution to journalArticle

Abstract

Vertically-aligned TiO2 nanotube (NT) arrays prepared by electrochemical anodization are considered promising alternatives to the conventional nanoparticle (NP)-based electrodes for photovoltaic devices. Recently, such NT arrays have been employed in dye-sensitized solar cells (DSSCs) by transferring them onto NP-based electrodes, to obtain multi-layered nanoelectrodes. Here, we comparatively evaluate the photovoltaic and photoelectrochemical properties of TiO2 NP-only electrodes and multi-layered electrodes comprising NP and NT arrays at the same thickness of 15 μm. Although the multi-layered electrodes have a smaller surface area compared to the NP-only electrodes, they show much higher transmittance. In addition, impedance studies reveal that the multi-layered electrodes have lower charge recombination with the electrolyte as well as enhanced electrolyte diffusion when applied as a photoanode in DSSCs. As a result, the multi-layered electrodes exhibit a photovoltaic conversion efficiency (η = 5.37%) comparable to that of the NP-only electrodes (η = 5.80%), despite 36.6% lower dye loading.

Original languageEnglish
Pages (from-to)69-76
Number of pages8
JournalInternational Journal of Precision Engineering and Manufacturing - Green Technology
Volume7
Issue number1
DOIs
Publication statusPublished - 2020 Jan 1

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Keywords

  • Dye-sensitized solar cells
  • Electrochemical anodization
  • TiO nanotube

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Management of Technology and Innovation

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