Effect of Out-of-Plane Alkyl Group's Position in Dye-Sensitized Solar Cell Efficiency: A Structure-Property Relationship Utilizing Indoline-Based Unsymmetrical Squaraine Dyes
| Autor: | Ananthan Alagumalai, Manik Chandra Sil, Punitharasu Vellimalai, M K Munavvar Fairoos, Jayaraj Nithyanandhan |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Carboxylic acid 02 engineering and technology Chromophore 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry Electrochemistry 01 natural sciences 0104 chemical sciences Out of plane chemistry.chemical_compound Dye-sensitized solar cell chemistry Group (periodic table) Indoline General Materials Science 0210 nano-technology Alkyl |
| Zdroj: | ACS applied materialsinterfaces. 8(51) |
| ISSN: | 1944-8252 |
| Popis: | Squaraine dyes are promising chromophores to harvest visible and near-infrared (NIR) photons. A series of indoline-based unsymmetrical squaraine (SQ) dyes that contain alkyl chains at sp3 C- and N- atoms of indoline moieties with a carboxylic acid anchoring group were synthesized. The optical and electrochemical properties of the SQ dyes in solution were nearly identical as there was no change in the D–A–D SQ framework; however, remarkable changes with respect to the power conversion efficiencies (PCE) were observed depending upon the position of alkyl groups in the dye. Introduction of alkyl groups to the indoline unit that was away from anchoring unit were helped in more dye loading with controlled organization of dyes on surface, increased charge transfer resistance, long electron lifetime, and hence higher PCE than that of the corresponding isomer in which the alkyl groups funtionalized indoline unit contains the carboxylic acid anchoring group. Careful analysis of incident photon-to-current conversio... |
| Databáze: | OpenAIRE |
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