Enhanced photoresponse of large-sized photoactive graphene composite films based on water-soluble conjugated polymers.

Composite films of chemically converted graphene (CCG) and water-soluble polythiophenes (P3TOPS and P3TOPA) were prepared by a LBL method using a suspension of negatively charged CCG–P3TOPS sheets and a solution of positively charged P3TOPA. The composite films show enhanced photoresponse due to photoinduced electron transfer from the polythiophenes to CCG. [ABSTRACT FROM AUTHOR]