fulltext.study @t Gmail

Enhancing in the performance of dye-sensitized solar cells by the incorporation of functionalized multi-walled carbon nanotubes into TiO2 films: The role of MWCNT addition

Paper ID Volume ID Publish Year Pages File Format Full-Text
26158 43937 2013 7 PDF Available
Title
Enhancing in the performance of dye-sensitized solar cells by the incorporation of functionalized multi-walled carbon nanotubes into TiO2 films: The role of MWCNT addition
Abstract

TiO2–MWCNT composite electrodes were prepared by a direct mixing method. The presence of acid-treated multi-wall carbon nanotubes (MWCNT–COOH) into the titanium dioxide (TiO2) photoanode was investigated by Raman spectroscopy and X-ray diffraction (XRD). The morphological properties of the composite photoanodes were analyzed by field emission scanning electron microscopy (FEG-SEM) and atomic force microscopy (AFM). The performance of quasi-solid state dye-sensitized solar cells (DSSC) using TiO2–MWCNT photoanodes was dependent on the MWCNT loading. Compared with a DSSC based on conventional TiO2 electrodes, the TiO2–MWCNT film containing 0.02 wt.% of carbon nanotubes provided an increase of ca. 30% in device's efficiency, which was attributed to an enhanced short-circuit current density (Jsc). The improvement on Jsc was correlated with an enhanced interconnectivity between MWCNT–COOH and TiO2 nanoparticles. The carbonaceous materials introduced an alternative electrical conduction pathway which facilitates rapid electron transport in the photoelectrode, as suggested from Kelvin probe force microscopy (KPFM) measurements. At high MWCNT loading, we observed that the energy conversion efficiency decreased due to energy losses from the optical absorption of carbonaceous materials, and also due to an increase in charge recombination.

► TiO2–MWCNT nanocomposites were prepared by a direct mixing method. ► The performance of DSSC using TiO2–MWCNT photoanodes was dependent on the MWCNT–COOH loading. ► The MWCNT introduced an alternative electrical conduction pathway which facilitates rapid electron transport in the photoelectrode. ► The TiO2 electrode containing 0.02 wt.% of MWCNT provided the best electrical parameters in this work, Jsc of 8.88 mA cm−2, Voc of 0.65 V, and a η of 3.05%.

Keywords
Dye-sensitized solar cells; Multi-walled carbon nanotubes; Gel polymer electrolytes
First Page Preview
Enhancing in the performance of dye-sensitized solar cells by the incorporation of functionalized multi-walled carbon nanotubes into TiO2 films: The role of MWCNT addition
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 251, 1 January 2013, Pages 78–84
Authors
, , , , , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us