Organic photovoltaic devices based on polyazomethine and fullerene

The optical, structural and photovoltaic properties of a π-conjugated polyazomethine with siloxane linkages (PAZ1) were explored. Obtained poly (siloxane-azomethine) exhibited liquid crystalline properties and formed stable smectic A and nematic phases. PAZ1 was applied to organic solar cells construction as a donor, while [6,6]-phenyl C61 butyric acid methyl ester (PC61BM) was used as an acceptor. The optical energy gap of PAZ1 at 2.24 eV was found. Atomic Force Microscope and photovoltaic experiments for devices based on PAZ1 and PAZ1:PC 61BM as active layer were investigated. Power conversion efficiency of investigated devices were found in the range (0.1–1)⋅10−2%.