Different Device Architectures for Bulk-Heterojunction Solar Cells

We report different solar cell designs which allow a simple electrical connection of subsequent devices deposited on the same substrate. By arranging the so-called standard and inverted solar cell architectures next to each other, a serial connection of the two devices can easily be realized by a single compound electrode. In this work, we tested different interfacial layer materials, such as polyethylenimine and PEDOT:PSS, and silver as a non-transparent electrode material. We also built organic light-emitting diodes applying the same device designs demonstrating the versatility of applied layer stacks. The proposed design should allow the preparation of organic bulk-heterojunction modules with minimized photovoltaically inactive regions at the interconnection of individual devices.