Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 4, Issue 6, Pages 2186-2192Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1ee01141c
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Funding
- New Energy and Industrial Technology Development Organization of Japan (NEDO) [09B39011d]
- Japan Science and Technology Agency (JST) [07-81-021, AS221Z01941D]
- Japan Society for the Promotion of Science (JSPS) [22234567]
- Koshiyama Foundation
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A novel near-infrared-absorbing heptamethine-cyanine dye (KFH-3) that contains four n-butyl groups was synthesized for use in highly efficient dye-sensitized solar cells with porous zinc oxide (ZnO) prepared at low temperature, and resulted in remarkable performance characteristics, such as a conversion efficiency of 1.23% (AM 1.5) with an incident photon-to-current conversion efficiency (800 nm) of 33%, a short-circuit photocurrent density of 3.34 mA, an open-circuit photovoltage of 0.49, and a fill factor of 0.76, using almost solely the near-infrared region of sunlight.
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