Abstract
New donor-π-acceptor organic dyes K-1 and K-2 containing thieno[2,3-a]carbazole as an electron donor were designed and synthesized for dye-sensitized solar cells (DSCs). Photophysical and electrochemical properties of K-dyes were investigated. DSCs based on K-dyes showed a high conversion efficiency of 6.6-6.7% with a Jscof 12.40-12.49 mA cm-2and a Vocof 0.70-0.71 V. The molecular geometry calculation indicated that the existence of thienocarbazole donor in K-dyes enhanced the molecular planarity compared to the carbazole analogue dye MK-3. As a result, DSCs based on K-dyes showed high IPCEs, perhaps due to efficient intramolecular charge transfer and electron injection from excited dye to TiO2conduction band.
Original language | English |
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Pages (from-to) | 6211-6216 |
Number of pages | 6 |
Journal | Tetrahedron |
Volume | 70 |
Issue number | 36 |
DOIs | |
Publication status | Published - 2014 |
Keywords
- Charge transfer
- Donor-π-acceptor dye
- Dye-sensitized solar cell
- Molecular planarity
- Thieno[2 3-A]carbazole
ASJC Scopus subject areas
- Biochemistry
- Drug Discovery
- Organic Chemistry