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2-Ethynyl-6-methylthieno[3,2- b ]thiophene as an efficient π spacer for porphyrin-based dyes
- Source :
- Dyes and Pigments. 122:168-176
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- In this study, three donor-π-acceptor (D-π-A) type unsymmetrical porphyrin-based dyes have been designed and synthesized for dye-sensitized solar cells (DSSCs). The photophysical, electrochemical and photovoltaic properties of the dyes were successfully adjusted by using functionalized arylamines (triphenylamine or N, N-dimethyl-4-(acetylene)-aniline) as donor, porphyrin derivatives as conjugated π bridge, ethynyl-thiophene or ethynyl-thiophthene as π spacer and carboxylic acid as anchor group. Compared with the dye containing ethynyl-thiophene as π spacer, the dyes containing 2-ethynyl-6-methylthieno[3,2-b]thiophene as π spacer between the porphyrin macrocycle and the carboxylic acid anchoring group show broadened absorption spectra on TiO2 films and red-shifted absorption spectra in solution. The dye based on triphenylamine and 2-ethynyl-6-methylthieno[3,2-b]thiophene exhibited a power conversion efficiency (PCE) of 4.53% under simulated air mass 1.5 global sunlight. These results indicate that the introduction of 2-ethynyl-6-methylthieno[3,2-b]thiophene in the meso-positions of porphyrin dyes is an effective approach to improve the photovoltaic performance.
- Subjects :
- chemistry.chemical_classification
Materials science
Absorption spectroscopy
Process Chemistry and Technology
General Chemical Engineering
Carboxylic acid
Conjugated system
Photochemistry
Triphenylamine
Porphyrin
chemistry.chemical_compound
Dye-sensitized solar cell
chemistry
Acetylene
Thiophene
Subjects
Details
- ISSN :
- 01437208
- Volume :
- 122
- Database :
- OpenAIRE
- Journal :
- Dyes and Pigments
- Accession number :
- edsair.doi...........79e83dd4ea0d8ced5617f8934ea41c5e