Toward tightly bound carboxylic acid-based organic dyes for DSCs: relative TiO2 binding strengths of benzoic acid, cyanoacrylic acid, and conjugated double carboxylic acid anchoring dyes
| Autor: | Adithya Peddapuram, Jared H. Delcamp, Phillip Brogdon, Nathan I. Hammer, Louis E. McNamara |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Mechanical Engineering Carboxylic acid Metals and Alloys 02 engineering and technology Conjugated system 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Fluorescence Acceptor Combinatorial chemistry 0104 chemical sciences Electronic Optical and Magnetic Materials Hydrolysis Dye-sensitized solar cell chemistry.chemical_compound Quinoxaline chemistry Mechanics of Materials Materials Chemistry Organic chemistry 0210 nano-technology Benzoic acid |
| Zdroj: | Synthetic Metals. 222:66-75 |
| ISSN: | 0379-6779 |
| DOI: | 10.1016/j.synthmet.2016.03.031 |
| Popis: | Strong anchoring groups are essential in the fabrication of the highest efficiency dye-sensitized solar cell (DSC) devices and for promoting long-term stability of photosensitizers in DSCs. While many metal-based sensitizers frequently make use of multiple anchors, synthesizing purely organic dyes with multiple anchors, especially those with anchors in direct conjugation with donor structures, has proved challenging. Novel quinoxaline-based dyes utilizing double donor/double acceptor structures can fill this gap in dye design understanding through a novel double donor-π-bridge-double acceptor (DD-π-AA) dye. These dyes have been synthesized with the optical and electrochemical properties, electron injection efficiencies, and relative binding strengths characterized. Fluorescence lifetime measurements show favorable electron injections from all dyes. Submersing dye-sensitized TiO 2 plates in a hydrolytic solution reveals desorption rates up to 180 times slower for dyes containing multiple carboxylic acid anchors compared to single acid anchors. |
| Databáze: | OpenAIRE |
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