Airbrush spray-coating of polymer bulk-heterojunction solar cells |
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Authors: | Gianpaolo SusannaLuigi Salamandra Thomas M. BrownAldo Di Carlo Francesca BrunettiAndrea Reale |
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Affiliation: | CHOSE (Centre for Hybrid and Organic Solar Energy), Department of Electronic Engineering, University of Rome Tor Vergata, via del Politecnico 1, 00133 Rome, Italy |
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Abstract: | We report on the fabrication of efficient polymer solar cells via airbrush coating as a promising method for low cost and large area production. We used a dual action airbrush for deposition of the active layer from a poly(3-hexylthiophene):[6,6]-Phenyl C61 butyric acid methyl-ester (P3HT:PCBM) blend dissolved in a co-solvent mixture. The resulting devices were measured under AM1.5G conditions and compared with spin-coated ones in air and nitrogen atmosphere. High power conversion efficiencies (η=4.1%) were obtained by optimizing the parameters of the spray system (i.e. film thickness, time of spray, distance between sample and airbrush, substrate temperature, etc.). The measurements also showed good repeatability and uniformity despite a relatively rougher surface. |
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Keywords: | Bulk-heterojunction solar cells Airbrush Spray-coating Polymer solar cells |
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