1. (D-π-)2D-π-A-Type Organic Dyes for Efficient Dye-Sensitized Solar Cells
- Author
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Vinich Promarak, Siriporn Jungsuttiwong, Pichaya Pattanasattayavong, Supawadee Namuangruk, Narid Prachumrak, Terdkait Kaewpuang, and Taweesak Sudyoadsuk
- Subjects
chemistry.chemical_classification ,Absorption spectroscopy ,Organic Chemistry ,Energy conversion efficiency ,Electron donor ,02 engineering and technology ,Electron acceptor ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Photochemistry ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,law.invention ,Dye-sensitized solar cell ,chemistry.chemical_compound ,chemistry ,law ,Solar cell ,Amine gas treating ,Physical and Theoretical Chemistry ,0210 nano-technology - Abstract
New (D–π–)2D–π–A-type dyes (CFTTnA, n = 2, 3) with a triarylamine as electron donor, a cyanoacrylic acid as both electron acceptor and anchoring group, and two π-conjugated 2-[7-(3,6-di-tert-butylcarbazol-9-yl)-9,9-dihexylfluoren-2-yl]thiophenes as N-aryl substituents on the amine donor as co-donors have been synthesized and characterized. Compared with a traditional D–π–A-type dye, these dyes exhibit broader absorption spectra and higher molar extinction coefficients as well as significantly enhanced photovoltaic performances. A power conversion efficiency of 6.64 % was achieved for a dye-sensitized solar cell (DSSC) based on CFTT3A. Theoretical calculations and electrochemical impedance spectroscopic investigations revealed the mechanism of the enhanced dye properties and cell performances.
- Published
- 2016