Development of a Healable Bulk Heterojunction Using Conjugated Donor Polymers Based on Thymine-Functionalized Side Chains
Autor: | Sungmin Park, Keun Jun Lee, Taehee Kim, Hae Jung Son, Hyungju Ahn, Sang Hyuk Im, Seongwon Yoon |
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Rok vydání: | 2021 |
Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic solar cell Organic Chemistry 02 engineering and technology Polymer Conjugated system 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Acceptor Polymer solar cell 0104 chemical sciences Thymine Inorganic Chemistry chemistry.chemical_compound chemistry Chemical engineering Materials Chemistry Side chain Molecule 0210 nano-technology |
Zdroj: | Macromolecules. 54:3478-3488 |
ISSN: | 1520-5835 0024-9297 |
Popis: | Developing intrinsically self-healable semiconducting polymers is particularly important for realizing stretchable electronic devices which can spontaneously recover their mechanical damage. We synthesized a series of conjugated donor polymers (PTO2-tm series) functionalized with a thymine group at the terminal of the side chain. Bulk heterojunction (BHJ) films of PTO2-tm polymers blended with an IT-4F acceptor achieved power conversion efficiencies up to 11.9% from the BHJ-based organic photovoltaics, which are comparable with that of unfunctionalized PTO2 and, however, exhibited much improved stretchability by virtue of stress dissipation in the BHJ films during mechanical deformation. More importantly, the corresponding BHJ film prepared with a melamine additive efficiently recovered their packing structures after being mechanically damaged by stretching. As a result, reversible multiple hydrogen bonding of the melamine molecule with thymine in PTO2-tm polymers showed much improved crack onset strain and maximum recoverable strain compared with PTO2. |
Databáze: | OpenAIRE |
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