TiO₂/silver/carbon nanotube nanocomposite working electrodes for high-performance dye-sensitized solar cells
- Authors
- Hwang, Hyun-Jun; Kim, Hak-Sung
- Issue Date
- Jun-2014
- Publisher
- SAGE PUBLICATIONS LTD
- Keywords
- Dye-sensitized solar cell; surface plasmon effect; TiO2; silver nanoparticles; carbon nanotube
- Citation
- JOURNAL OF COMPOSITE MATERIALS, v.48, no.14, pp.1679 - 1690
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF COMPOSITE MATERIALS
- Volume
- 48
- Number
- 14
- Start Page
- 1679
- End Page
- 1690
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/25864
- DOI
- 10.1177/0021998313490215
- ISSN
- 0021-9983
- Abstract
- In this study, we developed a new way to increase the efficiency of dye-sensitized solar cells by using TiO2/silver/carbon nanotube composites as the working electrode. Silver nanoparticles and multi-walled carbon nanotubes were mixed with TiO2 nanoparticles and used as working electrodes in a dye-sensitized solar cell. The effect of the silver nanoparticles and multi-walled carbon nanotubes on the efficiency of the dye-sensitized solar cell was studied as function of their volume fractions using several microscopic and spectroscopic characterization techniques such as scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, ultra-violet-vis and electrochemical impedance spectroscopy. It was found that the silver nanoparticles could induce surface plasmonic phenomena, where the light absorption was enhanced in the ultra-violet wavelength range. Additionally, the carbon nanotubes could increase the electron mobility in the working electrode due to their high surface-to-volume ratio and superior electrical conductivity. The efficiency of the silver/carbon nanotube/TiO2 nanocomposite working electrode was compared with that of a conventional TiO2 working electrode under one-sun illumination (100mWcm(-2), AM 1.5 G). The TiO2/Ag/carbon nanotube nanocomposite working electrode had a two-fold higher efficiency (3.76%) than the conventional pure TiO2 working electrode (1.88%).
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