| Title | A Facile Synthesis of Low-Band-Gap Donor-Acceptor Copolymers Based on Dithieno[3,2-b:2 `,3 `-d]thiophene |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | S.Y. Ku, C.D. Liman, Daniel J. Burke, N.D. Treat, J.E. Cochran, E. Amir, Louis A. Perez, M.L. Chabinyc, and C.J. Hawker |
| Journal | MACROMOLECULES |
| Volume | 44 |
| Pagination | 9533-9538 |
| Date Published | DEC 27 |
| ISSN | 0024-9297 |
| Abstract | A facile and scalable synthetic route to a soluble dithieno[3,2-b:2',3'-d]thiophene (DTT) unit has been developed, which utilizes a Stile coupling reaction to efficiently synthesize the bisthienyl sulfide intermediate. This simplifies the overall DTT synthesis to only four steps with a 44% yield and facilitates its use as a donor unit in low-band-gap polymers. Solution processable alternating D-pi-A-pi polymers (DTTBTO and DTTDPP) have been synthesized with DTT as the donor unit and either a benzothiodiazole derivative (BTO) or fused ring 1,4-diketopyrrolo[3,4-c]pyrrole (DPP) serving as the acceptor unit. The ability to tailor the structure of these donor-acceptor systems permits a detailed understanding of structure/property relationships for band-gap engineering, absorbance, V(oc), and efficiency to be developed and applied to the design of high-performance organic solar cells. |
| DOI | 10.1021/ma202095j |
