Synthesis and Characterization of Isoindigo-Based Polymers with Thermocleavable Side Chains
| Autor: | Xiaofeng Xu, Ergang Wang, Kim Bini, Mats Andersson |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic solar cell Organic Chemistry Crystal growth 02 engineering and technology Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Polymer solar cell 0104 chemical sciences chemistry Polymer chemistry Materials Chemistry Side chain Copolymer Thermal stability Physical and Theoretical Chemistry Solubility 0210 nano-technology |
| Zdroj: | Macromolecular Chemistry and Physics. 219:1700538 |
| ISSN: | 1022-1352 |
| Popis: | Stability of bulk heterojunction films for organic solar cells is a critical factor for commercial viability. One method to stabilize these films is to include cleavable side chains, which reduce the solubility of the polymers when removed. In order to study the stabilizing effect of cleavable side chains, a series of random copolymers using isoindigo with 0, 10, 20, 50, and 100% thermally cleavable side chains based on the tert-butyloxycarbonyl (t-BOC) group are synthesized. The polymers show a distinct one-step thermal cleavage of the side chains, with no separable dealkylation and decarboxylation steps. The thermal stability in film is studied with transmission electron microscopy and atomic force microscopy. The polymer with all t-BOC side chains on isoindigo significantly improves thermal stability with regard to crystal growth and phase separation in film. These results suggest BOC-substitution can be used for large scale processing to produce insoluble polymer films with a high degree of thermal stability. |
| Databáze: | OpenAIRE |
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