Solution-processed silver opaque electrode for organic solar devices

A way to upscale the manufacture of organic solar cells is through roll-to-roll processing in which is required to develop fully solution-processed devices. However, deposition via solution of opaque electrodes as final layer on top of the device stack has shown to still be challenging. In this work we present a simple method to develop such electrode based on silver plate-shaped micro-particles. We demonstrate that this electrode do not affect the underlying device structure while providing an optimal performance in terms of low sheet resistance and electrical stability. The final fabricated devices achieved up to 2.2% efficiency and very low device series resistance values. (C) 2014 Elsevier B.V. All rights reserved.