Efficient all polymer solar cells from layer-evolved processing of a bilayer inverted structure†
Abstract
A new electron acceptor poly(indacenodiselenophene-difluorobenzothiadiazole) was used to fabricate bilayer all-polymer solar cells with a high power conversion efficiency (2.5%). By using the layer-evolved bilayer structure with interfacial modification, it alleviates unbalanced charge carrier mobility and reduces bimolecular recombination within the BHJ device.