Dye-Sensitized Solar Cells with a High Absorptivity Ruthenium Sensitizer Featuring a 2-(Hexylthio)thiophene Conjugated Bipyridine
摘要：
We conjugated 2-(hexylthio)thiophene with bipyridine to construct a new heteroleptic polypyridyl ruthenium sensitizer exhibiting a charge-transfer band at 550 nm with a molar extinction coefficient of 18.7 × 103 M1 cm1. In contrast to its analogues Z907 and C101, a mesoporous titania film stained with this new sensitizer featured a short light absorption length, allowing for the use of a thin photoactive layer for efficient light-harvesting and conversion of solar energy to electricity. With a preliminary testing, we have reached 11.4% overall power conversion efficiency measured at the air mass 1.5 global conditions. Transient photoelectrical decays and electrical impedance spectra were analyzed to picture the intrinsic physics of temperature-dependent photovoltage and photocurrent.
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关键词：
EXTINCTION COEFFICIENT SENSITIZER IONIC LIQUID ELECTROLYTES NANOCRYSTALLINE TIO2 PHOTOVOLTAIC CELLS HIGH-EFFICIENCY CHARGE-TRANSPORT LIGHT RECOMBINATION COMPLEXES FILMS
DOI：
10.1021/jp9006872
被引量：
年份：
2009
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