Naslov
Nanostructured Organic Layers via Polymer Demixing for Interface-Enhanced Photovoltaic Cells

Autori
Castro, F. A. ; Benmansour, H. ; Graeff, C. F. O. ; Nueesch, F. ; Tutiš, Eduard ; Hany, R. ;

Izvornik
Chemistry of Materials (0897-4756) 18 (2006), 23; 5504 - 5509

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
demixing; polymers; organic heterjunction; roughness; efficiency

Sažetak
Significant progress is being made in the photovoltaic energy conversion using organic semiconducting materials. One of the focuses of attention is the morphology of the donor-acceptor heterojunction at the nanometer scale, to ensure efficient charge generation and loss-free charge transport at the same time. Here, we present a method for the controlled, sequential design of a bilayer polymer cell architecture that consists of a large interface area with connecting paths to the respective electrodes for both materials. We used the surface-directed demixing of a donor conjugated/guest polymer blend during spin coating to produce a nanostructured interface, which was, after removal of the guest with a selective solvent, covered with an acceptor layer. With use of a donor poly(p-phenylenevinylene) derivative and the acceptor C60 fullerene, this resulted in much-improved device performance, with external power efficiencies more than 3 times higher than those reported for that particular material combination so far.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA