Dependence of Polymer Hybrid Photovoltaic Performance on Donor-Acceptor Morphology

In this paper, we present our experimental and numerical studies on polymer-polymer and polymer-inorganic hybrid photovoltaic cells as the donor-acceptor morphology evolves from sharply defined layers, to partial blends and finally homogeneous blends. Results are compared for polyphenylene-vinylene (PPV) polymer donors and a variety of electron accepting materials, including CN-ether PPV, PCBM, and titanium dioxide. We show that optimal device performance is achieved by combining blended and layered structures and by tuning exciton generation rate position by controlling thickness