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 language | English |
|---|---|
| Pages (from-to) | 69-76 |
| Number of pages | 8 |
| Journal | International Journal of Precision Engineering and Manufacturing - Green Technology |
| Volume | 7 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 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
Cite this
Comparative Study on the Photoanode Nanoarchitectures for Photovoltaic Application. / Lee, Jin Ah; Kim, Jae Yup; Kim, Woong; Kang, Soon Hyung; Ko, Min Jae.
In: International Journal of Precision Engineering and Manufacturing - Green Technology, Vol. 7, No. 1, 01.01.2020, p. 69-76.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Comparative Study on the Photoanode Nanoarchitectures for Photovoltaic Application
AU - Lee, Jin Ah
AU - Kim, Jae Yup
AU - Kim, Woong
AU - Kang, Soon Hyung
AU - Ko, Min Jae
PY - 2020/1/1
Y1 - 2020/1/1
N2 - 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.
AB - 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.
KW - Dye-sensitized solar cells
KW - Electrochemical anodization
KW - TiO nanotube
UR - http://www.scopus.com/inward/record.url?scp=85077316940&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85077316940&partnerID=8YFLogxK
U2 - 10.1007/s40684-019-00089-2
DO - 10.1007/s40684-019-00089-2
M3 - Article
AN - SCOPUS:85077316940
VL - 7
SP - 69
EP - 76
JO - International Journal of Precision Engineering and Manufacturing - Green Technology
JF - International Journal of Precision Engineering and Manufacturing - Green Technology
SN - 2288-6206
IS - 1
ER -