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http://dx.doi.org/10.5012/bkcs.2014.35.10.2895

Improved Performance of CdS/CdTe Quantum Dot-Sensitized Solar Cells Incorporating Single-Walled Carbon Nanotubes  

Shin, Hokyeong (Department of Chemistry, College of Natural Science, Hanyang University)
Park, Taehee (Department of Chemistry, College of Natural Science, Hanyang University)
Lee, Jongtaek (Department of Chemistry, College of Natural Science, Hanyang University)
Lee, Junyoung (Department of Chemistry, College of Natural Science, Hanyang University)
Yang, Jonghee (Department of Chemistry, College of Natural Science, Hanyang University)
Han, Jin Wook (Department of Chemistry, College of Natural Science, Hanyang University)
Yi, Whikun (Department of Chemistry, College of Natural Science, Hanyang University)
Publication Information
Bulletin of the Korean Chemical Society / v.35, no.10, 2014 , pp. 2895-2900 More about this Journal
Abstract
We fabricated quantum dot-sensitized solar cells (QDSSCs) using cadmium sulfide (CdS) and cadmium telluride (CdTe) quantum dots (QDs) as sensitizers. A spin coated $TiO_2$ nanoparticle (NP) film on tin-doped indium oxide glass and sputtered Au on fluorine-doped tin oxide glass were used as photo-anode and counter electrode, respectively. CdS QDs were deposited onto the mesoporous $TiO_2$ layer by a successive ionic layer adsorption and reaction method. Pre-synthesized CdTe QDs were deposited onto a layer of CdS QDs using a direct adsorption technique. CdS/CdTe QDSSCs had high light harvesting ability compared with CdS or CdTe QDSSCs. QDSSCs incorporating single-walled carbon nanotubes (SWNTs), sprayed onto the substrate before deposition of the next layer or mixed with $TiO_2$ NPs, mostly exhibited enhanced photo cell efficiency compared with the pristine cell. In particular, a maximum rate increase of 24% was obtained with the solar cell containing a $TiO_2$ layer mixed with SWNTs.
Keywords
Quantum dot-sensitized solar cell; CdTe; CdS; Single-walled carbon nanotube;
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