Indium-free multilayer semi-transparent electrodes for polymer solar cells

Alexander T. Barrows, Rob Masters, Andrew J. Pearson, Cornelia Rodenburg, David G. Lidzey
2016 Solar Energy Materials and Solar Cells  
We have explored the fabrication of indium-free electrodes for use in a PCDTBT:PC 70 BM organic photovoltaic (OPV) device, and compare different multilayer electrodes as the device anode. Two oxide/ metal/oxide structures were investigated that consisted of MoO 3 /Ag/MoO 3 (MAM) and TeO 2 /Ag/MoO 3 (TAM) multilayers. Using scanning electron microscopy measurements, we find that the electrode utilising a TeO 2 seed layer encouraged the growth of a more continuous silver layer at low film
more » ... at low film thickness relative to an MoO 3 seed layer, and thus combines enhanced optical transmission (by around 7%) with low sheet resistance (14 Ω/□). This enhanced optical transmittance results in an increased short-circuit current in photovoltaic cells, with TAM-based devices having a power conversion efficiency around 6% higher than those fabricated using a comparable MAM electrode.
doi:10.1016/j.solmat.2015.10.010 fatcat:wzicgthpbbhyxa2kwesvj3d6mi