Cellulose-based organic solar cells via spray deposition

In this project, we use spray deposition to fabricate cellulose-based, flexible organic solar cells. We use TEMPO-cellulose nanofibrils (TEMPO-CNF) as sustainable substrate material, flexible silver- or copper-nanowires (AgNW-/CuNW) as electrode material, conductive poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as electron blocking layer, and a mixture of poly(3 hexylthiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methylester (PCBM) as photoactive layer. For this, we especially focus on the production and development of sustainable spray-inks: e.g. we aim to replace toxic standard solvents of P3HT:PCBM with green alternatives, and explore the beneficial impact of adding TEMPO-CNF to AgNW-/CuNW dispersion.