Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 164, Issue 1-3, Pages 61-66Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2003.12.026
Keywords
titanium oxide; polymers; solar cells; organic semiconductors
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Volatile solvent free quasi-solid solar cells were fabricated using acid-doped polyaniline (PANI) covalently grafted on surface-modified nanocrystalline TiO2 substrates via self assembled monolayer (SAM) of silane-bearing aniline compound (C6H5NHC3H6Si(OMe)(3)) (SAM) and investigated their photovoltaic performances with different additives. PANI was able to sensitize TiO2 efficiently in the presence of SAM. Introduction of ionic liquid 1-ethyl-3-methylimidazolium bis(trifluroromethyl)sulfonylamid and LiTf2N enhanced the photocurrent of TiO2/PANI/Au cell by more than two-fold. The cell treated with 1-methyl-3-n-hexylimidazolium iodide delivered a photocurrent of similar to450 muA cm(-2) with photovoltage of similar to565 mV, giving an efficiency of similar to0.12% (FF = 0.47). (C) 2004 Elsevier B.V. All rights reserved.
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