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Performance improvement of zinc oxide photoanode-based dye-sensitized solar cells by multi-walled carbon nanotube.
MedLine Citation:
PMID:  21137901     Owner:  NLM     Status:  PubMed-not-MEDLINE    
Abstract/OtherAbstract:
Unique electrical and surface-to-volume properties of carbon nanotubes have made these conductive molecules highly attractive in many applications. In this work, the influence of multi-walled carbon nanotubes into a zinc oxide active layer of dye-sensitized zinc oxide solar cell has been investigated. With this method, a significant improvement in the performance of the solar cell has been achieved. Compared to the typical zinc oxide photoelectrochemical cells, the photocurrent-voltage characteristics of the fabricated cell containing 0.05 percent by weight of carbon nanotubes in the metal oxide film displayed a higher short-circuit photocurrent, consequently caused an increase of the solar-to-electricity conversion efficiency by a factor of approximately 1.4. Further increase of the conductive carbon material resulted in a decrease of the energy conversion of the photovoltaic cell. The enhancement of the energy conversion at this optimum carbon nanotube loading may be attributed to the dye-adsorption ability and the electrochemical activity of the composite photoanodes. The fabricated photovoltaic cells with the highest efficiency exhibited the maximum dye adsorption intensity and the minimum charge transfer resistance, as measured by ultraviolet-visible spectroscopy and electrochemical impedance spectroscopy, respectively.
Authors:
Anon Chindaduang; Pattasuda Duangkaew; Sirapat Pratontep; Gamolwan Tumcharern
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of nanoscience and nanotechnology     Volume:  10     ISSN:  1533-4880     ISO Abbreviation:  J Nanosci Nanotechnol     Publication Date:  2010 Nov 
Date Detail:
Created Date:  2010-12-08     Completed Date:  2010-12-30     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088195     Medline TA:  J Nanosci Nanotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  7217-20     Citation Subset:  -    
Affiliation:
National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathumthani 12120, Thailand.
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