Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 112, Issue 44, Pages 17046-17050Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp808018h
Keywords
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Funding
- National Key Scientific Program-Nanoscience and Nanotechnology [2007CB936700]
- National Science Foundation of China [50773078]
- Chinese Academy of Sciences
- U.S. Air Force [8655-08-C4003]
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We report a high molar extinction coefficient heteroleptic polypyridyl ruthenium sensitizer, featuring an electron-rich 3,4-ethylenedioxythiophene unit in its ancillary ligand. A nanocrystalline titania film stained with this sensitizer shows an improved optical absorption, which is highly desirable for practical dye-sensitized solar cells with a thin photoactive layer, facilitating the efficient charge collection. In conjunction with low-volatility and solvent-free electrolytes, we achieved 9.6-10.0% and 8.5-9.1% efficiencies under the air-mass 1.5 global solar illumination. These dye-sensitized solar cells retain over 90% of the initial performance after 1000 h full sunlight soaking at 60 degrees C.
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