Device Performance of P3HT7C_(70)-Methanofullerene Bulk-Heterojunction Polymer Photovoltaic Cells

摘要

In order to more improve the performance of the existing P3HT:C_(60) polymer photovoltaic cells, we adopted soluble C_(70) insteade of C_(6o). The absorption spectra of soluble C_(70) showed a significant increase of visible range absorption, resulting in the enhanced photocurrent. To optimize the device fabrication, we controlled the solvent, concentration of polymer solution and the thickness of photo-active layer. The best power conversion efficiency obtained in our P3HT:C_(70) photovoltaic cells was about 3.0 % under AM 1.5G condition.