Macromolecular Chemistry and Physics
© WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
January 21, 2013
Functional Polymers: Thermochromic and Photovoltaic Properties of an Alternating Copolymer of Dithieno[3,2-b:2',3'-d]thiophene and Thieno[3,4-c]pyrrole-4,6-dione
Zhao Li,* Patrick Malenfant, Ye Tao, Jianfu Ding*
A new alternating conjugated polymer, PDTTTPD, based on electron-rich dithieno[3,2-b:2',3'-d]thiophene (DTT) and electron-deficient thieno[3,4-c]pyrrole-4,6-dione (TPD) building block is designed and synthesized. PDTTTPD shows strong thermochromic effect in chlorobenzene solution and modest PCE of 2.1% in organic solar cell devices due to the steric hindrance induced twisting of the conjugated main chain. A general design rule is then suggested to control the main chain conformation of polymer materials for photovoltaic applications.
Macromol. Chem. Phys., DOI: 10.1002/macp.201200468