Solution-Processed Nanostructured Benzoporphyrin with Polycarbonate Binder for Photovoltaics

Ku, S.Y.; Liman, C.D.; Cochran, J.E.; Toney, M.F.; Chabinyc, M.L.; Hawker, C.J.
Adv. Mater.
2011
23, 2289-2294.

A new method to aid large-area solution processing of organic small molecule semiconductors is reported. A thermally degradable poly(propylene carbonate) (PC) binder is added to a solution of soluble precursor to a tetrabenzoporphyrin to increase its viscosity, allowing for the use of large-area methods such as inkjet printing, slot coating, or blade coating. This method is used to make bulk heterojunction solar cells with a p-i-n type structure.