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| Content Provider | Royal Society of Chemistry (RSC) |
|---|---|
| Author | Jenekhe, Samson A. Subramaniyan, Selvam Earmme, Taeshik Murari, Nishit M. |
| Copyright Year | 2014 |
| Abstract | New n-type conjugated polymer semiconductors bearing an electron-deficient naphthobisthiazole diimide (NBTDI) moiety have been synthesized and their electronic energy levels, solid-state morphology, field-effect charge transport and photovoltaic properties were investigated. Stille coupling polymerization of the new monomer 5,11-bis(4-bromophenyl)-2,8-bis(2-decyltetradecyl)-benzothiazolo[4,5,6,7-lmn]thiazolo[5,4-f][3,8]phenanthroline-1,3,7,9(2H, 8H)-tetrone with distannyl derivatives of the arylene moiety (1,4-phenylene/2,5-thienylene/vinylene) yielded poly(naphthobisthiazole diimide)s (PNBTDIs) with number-average molecular weights of 73–89 kDa and polydispersity indexes of 2.46–3.08. Thin films of the PNBTDIs have strong absorption bands in the visible region, resulting in an absorption edge optical band gap of 1.73–2.02 eV. X-ray diffraction analysis of neat films of PNBTDIs revealed lamellar crystalline materials with a rather short intermolecular π–π stacking distance of 0.34–0.35 nm. In thin film transistors, the PNBTDIs showed unipolar n-channel transport with electron mobility as high as 1.5 × 10−2 cm2 V−1 s−1. All-polymer solar cells incorporating the PNBTDIs as an electron acceptor and thiazolothiazole copolymer (PSEHTT) as a donor had power conversion efficiencies of 1.1–1.5%. The results demonstrate that poly(naphthobisthiazole diimide)s are promising n-type materials for field-effect transistors and all-polymer solar cells. |
| Starting Page | 5707 |
| Ending Page | 5715 |
| Page Count | 9 |
| File Format | HTM / HTML PDF |
| ISSN | 17599954 |
| Volume Number | 5 |
| Issue Number | 19 |
| Journal | Polymer Chemistry |
| DOI | 10.1039/c4py00566j |
| Language | English |
| Publisher | Royal Society of Chemistry |
| Access Restriction | Open |
| Subject Keyword | Dispersity Extrinsic semiconductor Polymerization Electronvolt Polymer Stille Stille reaction Solar cell X-ray crystallography Vinylene group Electron mobility Diazene Phenanthroline Band gap Copolymer Monomer Electron acceptor |
| Content Type | Text |
| Resource Type | Article |
| Subject | Organic Chemistry Biochemistry Bioengineering Biomedical Engineering Polymers and Plastics |
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