Abstract
N,N′-Di(1-nonadecyl)perylene-3,4:9,10-bis(dicarboximide) (PDI-C9) based bulk-heterojunction photovoltaic devices increased the power conversion efficiency (PCE) with increasing PDI-C9 concentration and showed the highest incident photon-to-current conversion efficiency (IPCE) of 19% at 495 nm and PCE of 0.18% under AM 1.5 (100 mW/cm2) have been achieved with 1:4 ratio of P3HT: PDI-C9. 1,7-Bis(N-pyrrolidinyl)-N,N′-dicyclohexyl-3,4:9,10-perylenebis(dicarboximide) (5-PDI-DI) based devices showed best performance of 9% IPCE at 525 nm and 0.18% (AM 1.5) PCE at 1:1 blend ratio of P3HT: 5-PDI-DI and the PCEs were drastically decreased by increasing 5-PDI-DI ratio.
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