Enhancement of device efficiency in CuPc/C60 based organic photovoltaic cells by inserting an InCl3 layer

An InCl3 dipole layer is inserted into a copper phthalocyanine (CuPc) and fullerene (C60) based organic photovoltaic cell (OPV) to modify the indium-tin-oxide (ITO) anode surface. The work function of the ITO is improved from 4.63 eV to 5.47 eV. In addition, a 30% enhancement in absorption coefficient is achieved due to the strong interaction between CuPc and InCl3 molecules, which induces a configuration change of the CuPc stacks from perpendicular to parallel along the ITO substrate. Therefore, the power conversion efficiency of the OPV devices has a 30% improvement because of the improved work function of the ITO anode and the enhanced absorption coefficient of the devices.

Figure optionsDownload as PowerPoint slideHighlights
► The work function of InCl3 modified ITO can be increased from 4.63 eV to 5.47 eV.
► Optical absorption enhancement can be obtained from a CuPc film grown on the ITO.
► 30% improvement in performance of the OPV devices can be then achieved.