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 journalArticlepeer-review

5 Citations (Scopus)


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
Issue number1
Publication statusPublished - 2020 Jan 1

Bibliographical note

Funding Information:
This work was supported by the Global Frontier R&D Program on Center for Multiscale Energy System (2012M3A6A7054856), Technology Development Program to Solve Climate Changes (2017M1A2A2087353), Research Program (2018R1A2B2006708) funded by the National Research Foundation under the Ministry of Science and ICT, Republic of Korea. This work was also supported by the Energy Demand Management Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry and Energy, Republic of Korea (No. 20173010013200 and No. 2018201010636A), Basic Science Research Program (2017R1D1A1B03035077) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Republic of Korea.

Publisher Copyright:
© 2019, Korean Society for Precision Engineering.


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

ASJC Scopus subject areas

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


Dive into the research topics of 'Comparative Study on the Photoanode Nanoarchitectures for Photovoltaic Application'. Together they form a unique fingerprint.

Cite this