Photovoltaics of interconnected networks

All three types of organic solar cells i.e. sensitised photoelectrochemical cells, molecular organic and polymeric "plastic" cells, work best when utilising interpenetrating networks. Although the basic construction is equal, the current understanding and the modelling of devices by different groups are contradictory. Whereas photoelectrochemists use classical models based on the solid/electrolyte junctions, the polymeric, organic device community seems to prefer to treat the network system as an intrinsic material sandwiched between metals of different work function (metal-insulator-metal MIM devices). Both approaches will be discussed with recent experiments performed with molecular organic solar cells.