期刊
SYNTHETIC METALS
卷 160, 期 13-14, 页码 1438-1441出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2010.05.001
关键词
Conjugated polymers; Low band gap; Donor-acceptor copolymer; Electrochemistry; Fused ring
资金
- AasterickSTAR, Singapore [SERC 052, 1170029]
Poly{[N-dodecyl-dithieno(3,2-b:2',3'-d)pyrrole-2,6-diyl 1-alt-[2,1,3-benzothiadiazole-4,7-diyl]} (PBT-DTP) was successfully prepared via Stille coupling. The new polymer is soluble in common organic solvents such as chloroform (CHCl3), tetrahydrofuran (THF) and o-dichlorobenzene. Compared with N-alkyl dithieno[3,2-b:2',3'-d]pyrrole (DTP) homopolymer, the maximum absorption of PBTDTP was red-shifted approximately 40 nm. The optical band gap of the polymer in film state is 1.55 eV calculated from the onset of absorption spectrum. The cyclic voltammetry measurements of the polymer depicted a HOMO energy level of -5.0 eV and a LUMO energy level of -3.3 eV of PBTDTP. This work demonstrates that this newly synthesized polymer is a promising p-type material for application in bulk hetero-junction organic solar cells. (C) 2010 Elsevier B.V. All rights reserved.
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