Bulk heterojunction PCPDTBT:PC71BM organic solar cells deposited by emulsion-based, resonant infrared matrix-assisted pulsed laser evaporation

Abstract

Organic solar cells based on poly[2,6-(4,4-bis-(2-ethylhexyl)-4H-cyclopenta[2,1-b;3,4-b′]dithiophene)-alt-4,7-(2,1,3-benzothiadiazole)] (PCPDTBT) and [6,6]-phenyl C71 butyric acid methyl ester (PC71BM) were fabricated by emulsion-based, resonant infrared matrix-assisted pulsed laser evaporation (RIR-MAPLE). Two different deposition modes, namely simultaneous deposition and sequential deposition, were investigated for fabricating bulk-heterojunction organic solar cells. This work demonstrates that the RIR-MAPLE sequential deposition mode provides precise ratio control for the fabrication of bulk-heterojunction organic solar cells.