The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 03, 2012
Filed:
Nov. 25, 2009
Changduk Yang, Goleta, CA (US);
Fred Wudl, Santa Barbara, CA (US);
Changduk Yang, Goleta, CA (US);
Fred Wudl, Santa Barbara, CA (US);
The Regents of the University of California, Oakland, CA (US);
Abstract
A method for the synthesis of well-defined rod-coil block copolymers consisting of P3HT donor and Cacceptor chromophores (P3HT-b-P(SA)-C) in a molecular architecture is reported for use in bulk-heterojunction (BHJ) solar cells. In thin films of the resulting block copolymer, reproducible self-assembly into well-defined 'nanofibrils' is observed. This is the first example of a block copolymer containing a Cderivative that shows exclusively a nanofibrilar structure. A substantial improvement in device performance is achieved when the block copolymer is used as a 'surfactant' for controlling the interface morphology of the P3HT:PCBM donor-acceptor phase domains within the composite.