Journal
NANO LETTERS
Volume 9, Issue 6, Pages 2487-2492Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl901246g
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Funding
- Taiwan Merit Scholarships Program [TMS-094-2A-026]
- MIUR-FIRB
- INSTM-PRISMA
- National Research Foundation of Korea [과06B1510] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Solid-state dye-sensitized solar cells were fabricated using an organic dye, 2-cyanoacrylic acid-4-(bis-dimethylfluoreneaniline)dithiophene (JK2), which exhibits more than 1 V open-circuit potential (V-oc). To scrutinize the origin of high voltage in these cells, transient V-oc decay measurements and density functional theroy calculations of the interacting dye/semiconductor surface were performed. A negative conduction band shift was observed due to the favorable dipolar field exerted by the JK2 sensitizer to the TiO2 surface, at variance with heteroleptic Ru(II)-dyes for which an opposite dipole effect was found, providing an increased V-oc.
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