Improvement of photo-current density by alternative deposition method for organic photovoltaic cell

Recently, power conversion efficiency of organic photovoltaic cell (OPV) has been upgraded due to high photo current density. An aggregation of organic molecules causes a reduction of photovoltaic performance owning to decline in film uniformity of organic layer. Here, we investigate the effect of alternative deposition method on controlling the aggregation and crystallization of organic layers. Advantage of the alternative deposition method is to improve photo current density due to the improved quality of p-n heterojunction. We succeeded in improving the photo current density by our alternative deposition method of tetraphenyldibenzoperiflanthene/C60 OPV cells.