Comparative Study on the Photoanode Nanoarchitectures for Photovoltaic Application
- Authors
- Lee, Jin Ah; Kim, Jae-Yup; Kim, Woong; Kang, Soon Hyung; Ko, Min Jae
- Issue Date
- 1월-2020
- Publisher
- KOREAN SOC PRECISION ENG
- Keywords
- TiO2 nanotube; Dye-sensitized solar cells; Electrochemical anodization
- Citation
- INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY, v.7, no.1, pp.69 - 76
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
- Volume
- 7
- Number
- 1
- Start Page
- 69
- End Page
- 76
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/58490
- DOI
- 10.1007/s40684-019-00089-2
- ISSN
- 2288-6206
- 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 mu m. 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 (eta = 5.37%) comparable to that of the NP-only electrodes (eta = 5.80%), despite 36.6% lower dye loading.
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