期刊
ACS NANO
卷 4, 期 6, 页码 3503-3509出版社
AMER CHEMICAL SOC
DOI: 10.1021/nn100574g
关键词
carbon nanotubes; water-soluble carbon nanotubes; dye-sensitized solar cell; electrospray; counter electrode
类别
资金
- KIST Program
- Korea Research Council of Fundamental Science & Technology (KRCF)
- KIST
- Ministry of Knowledge Economy, Republic of Korea
- Korea Evaluation Institute of Industrial Technology (KEIT) [K0006031] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Water-soluble, polyelectrolyte-grafted multiwalled carbon nanotubes (MWCNTs), MWCNT-g-PSSNa, were synthesized using a grafting to route. MWCNT-g-PSSNa thin films fabricated by an electrostatic spray (e-spray) technique were used as the counter electrode (CE) for dye-sensitized solar cells (DSSCs). The e-sprayed MWCNT-g-PSSNa thin-film-based CEs (MWCNT-CE) were uniform over a large area, and the well-exfoliated MWCNTs formed highly interconnected network structures. The electrochemical catalytic activity of the MWCNT-CE at different thicknesses was investigated. The MWCNT-g-PSSNa thin film showed high efficiency as a CE in DSSCs. The power conversion efficiency (PCE) of the DSSCs using the MWCNT-g-PSSNa thin-film-based CE (DSSC-MWCNT) was >6% at a CE film thickness of similar to 0.3 mu m. The optimum PCE was >7% at a film thickness of similar to 1 mu m which is 20-50 times thinner than conventional carbon-based CE. The charge transfer resistance at the MWCNTCE/electrolyte interface was 1.52 Omega cm(2) at a MWCNT-CE thickness of 0.31 mu m, which is lower than that of a Pt-CE/electrolyte interface, 1.78 Omega cm(2). This highlights the potential for the low-cost CE fabrication of DSSCs using a facile deposition technique from an environmentally friendly solution at low temperatures.
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