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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Xu, Xiaofeng Wu, Bo Lu, Yong Zhu, Furong Ng, Siu Choon Lei, Yanlian Ong, Beng S. Hu, Xiao |
| Copyright Year | 2015 |
| Abstract | New π-conjugated alternating donor–acceptor polymers, BPD–DTT and PPD–DTT, based respectively on benzo[c]pyrrole-4,6-dione (BPD) and pyrrolo[3,4-c]pyrrole-4,6-dione (PPD) acceptor structures with the 2,5-dithienylthieno[3,2-b]thiophene (DTT) donor structure were synthesized via Stille cross-coupling polymerization to study their physical and optoelectronic properties. For comparison, an analogous polymer, TPD–DTT, derived from thieno[3,4-c]pyrrole-4,6-dione (TPD) was also prepared by the same approach. These polymers displayed reasonably good solubility in common organic solvents (e.g., THF, toluene, etc.), and were thermally stable to about 350 °C in nitrogen or air. Both BPD–DTT and PPD–DTT showed blue shifts in their UV-vis absorptions and photoluminescence compared with those of TPD–DTT, suggesting that both possess lower degrees of π-delocalization than TPD–DTT, and thus shorter effective π-conjugation lengths and higher air stability as evidenced from their lower HOMO energy levels. Optical band gaps of 1.61 eV, 1.82 eV, and 1.73 eV and HOMO levels of −5.06 eV, −5.32 eV, and −5.20 eV were estimated for TPD–DTT, BPD–DTT and PPD–DTT respectively from spectral and electrochemical measurements. Electrical characterization showed that all three polymers behaved predominantly as p-type semiconductors in organic field-effect transistor and bulk-heterojunction organic solar cell devices. |
| Starting Page | 2642 |
| Ending Page | 2650 |
| Page Count | 9 |
| File Format | HTM / HTML PDF |
| ISSN | 11440546 |
| Volume Number | 39 |
| Issue Number | 4 |
| Journal | New Journal of Chemistry |
| DOI | 10.1039/c4nj01810a |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Optoelectronics Extrinsic semiconductor HOMO\/LUMO DTT PPD Digital terrestrial television Toluene Organic solar cell Photoluminescence HOMO Polymerization Electronvolt Polymer Organic field-effect transistor Stille Thiophene Nitrogen P-Phenylenediamine THF Pyrrole Electrochemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Materials Chemistry Catalysis |
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