Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 19, Issue 27, Pages 4829-4836Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b905831a
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Funding
- New Energy and Industrial Technology Development Organization (NEDO) of Japan
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We designed and synthesized new substituted carbazole dyes, MK-14 and -16, for dye-sensitized solar cells (DSSCs) employing the I-/I-3(-) redox couple. By the addition of a hexyloxyphenyl substituent to previously reported carbazole dyes MK-1 and -2, the electron lifetime and open circuit voltage of the DSSCs employing these dyes were increased, showing comparable values with those using a conventional Ru complex dye. This result was achieved by the retardation of the charge recombination, caused by more effective blocking of the I-3(-) ion in the electrolyte than that in the cases of MK-1 and -2. The result shows the importance of the position of alkyl chains attached to the main framework of dye molecules.
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