Properties of Photovoltaic Cell using ZnPc/C60 Double Layer Devices

Abstract

It has been a long time since organic solar cells were expected as a low-cost energy-conversion device. Although practical use of them has not been achieved, technological progress continues. Morphology of the materials, organic/inorganic interface, metal cathodes, molecular packing and structural properties of the donor and acceptor layers are essential for photovoltaic response. We have fabricated solar cell devices based on zinc-phthalocyanine(ZnPc) as donor(D) and fullerene(C60) as electron acceptor(A) with doped charge transport layers, and BCP and Alq3 as an exciton blocking layer(EBL). We have measured the photovoltaic characteristics of the solar cell devices using the Xe lamp as a light source. We were use of Alq3 layer leads to external power conversion efficiency was 2.65 % at illumination intensity 100 mW/cm2. Also we confirmed the optimum thickness ratio of the DA hetero-junction is about 1:2.