A polymerized ionic liquid of poly((1-(4-ethenylphenyl)methyl)-3-butyl- imidazolium iodide) was synthesized and employed as a solid electrolyte for I2-free solid-state dye-sensitized solar cells. The electrode/electrolyte interfaces were significantly improved using a graft copolymer-directed, organized mesoporous TiO2 thin film. The conversion efficiency reached 5.93% at 100 mW/cm2, one of the highest observed values, due to decreased interfacial resistance and enhanced electron lifetime.
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation (NRF) grant funded by the Korea government (MEST) through the Korea Center for Artificial Photosynthesis (KCAP) ( NRF-2009-C1AAA001-2009-0093879 ) and the Advanced Biomass R&D Center (ABC) ( ABC-2010-0029737 ). This work was also supported by the Low Observable Technology Research Center program of Defense Acquisition Program Administration and Agency for Defense Development .
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