Journal
NANO LETTERS
Volume 11, Issue 8, Pages 3383-3387Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl201790w
Keywords
Dye-sensitized solar cell; photovoltaic wire; flexible photovoltaics; carbon nanotube
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Funding
- National Natural Science Foundation of China [90922004, 20821091]
- National Basic Research Program [2011CB933300]
- China Postdoctoral Science Foundation [20090460147]
- NSFC [51072005]
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Conventional fiber-shaped polymeric or dye-sensitized solar cells (DSSCs) are usually made into a double-wire structure, in which a secondary electrode wire (e.g., Pt) was twisted along the primary core wire consisting of active layers. Here, we report highly flexible DSSCs based on a single wire, by wrapping a carbon nanotube film around Ti wire-supported TiO(2) tube arrays as the transparent electrode. Unlike a twisted Pt electrode, the CNT film ensures full contact with the underlying active layer, as well as uniform illumination along circumference through the entire DSSC. The single-wire DSSC shows a power conversion efficiency of 1.6% under standard illumination (AM 1.5, 100 mW/cm(2)), which is further improved to more than 2.6% assisted by a second conventional metal wire (Ag or Cu). Our DSSC wires are stable and can be bent to large angles up to 90 degrees reversibly without performance degradation.
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