Bulkheterojunctions (blended junctions) are indispensable for organic solar cells. However, the fabrication of electron and hole transport routes in bulkheterojunction remains quite challenging. Here, a lateral alternating multilayered junction having an ability to collect both excitons and carriers almost completely, which can be regarded as an alternative bulkheterojunction, is successfully demonstrated. The present new concept paves the way to exceed the conversion efficiency of organic solar cells above 20 percent.
