Journal
DYES AND PIGMENTS
Volume 81, Issue 3, Pages 224-230Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2008.10.012
Keywords
Dye-sensitized solar cells; Bis-TPA substituted dyes; Mono-TPA substituted dyes; Donor-acceptor; Higher open-circuit voltage (V-oc); Nanocrystallite TiO2 film
Funding
- NSF of China [20774099, 20673141, 20834006, 50521302]
- 863 Program [2006AA03Z341, 2008AA05Z425]
- Open Project of State Key Laboratory of Supramolecular Structure and Materials [SKLSSM200706]
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Three, novel dyes carrying bis-triphenylamine donor groups were designed and synthesized, and their optical and electrochemical properties were characterized. TiO2-based dye-sensitized solar cells fabricated with the dyes as photosensitizers displayed higher open-circuit voltage and power conversion efficiency than the corresponding mono-TPA substituted donor-acceptor dyes. The two, hydrophobic bis-triphenylamine donor groups within the dyes effectively inhibited the approach of I-3(-) to the surface of nanocrystallite TiO2 film. The most promising of the novel dyes displayed a power conversion efficiency of 5.06%, short circuit photocurrent density of 10.25 mA cm(-2), open circuit photovoltage of 0.678 V and fill factor of 0.73. (C) 2008 Elsevier Ltd. All rights reserved.
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