EFFICIENT ORGANIC SOLAR CELLS BASED ON A STACKED BULK HETEROJUNCTION STRUCTURE

摘要

Bulk generated charge carriers need to percolate within the bulk blend toward their specific electrodes. That may lead to reduced charge carrier mobility by the intermixing of two compounds which again limits the range of active layer thickness accessible without significant recombination losses. To overcome this limitation, we investigate the stacked structure of bulk heterojunction (BHJ) organic solar cells based on conjugated polymer and ZnO nanoparticles by the solution processing of spin-coating method. Poly[2-methoxy, 5-(2′ -ethyl-hexyloxy) -1,4-phenylene vinylene] (MEH-PPV) blend with ZnO nanoparticles (50nm) is used as a photoactive layer. The structure is ITO/PEDOT:PSS/ MEH-PPV /Ag/ MEH-PPV: ZnO /Al. VOC and JSC of the stacked cell has a significant improvement compared to individual organic solar cell (ITO/PEDOT:PSS/ MEH-PPV / Al).