Solution processed ITO-free organic photovoltaic devices

ITO-free organic photovoltaic (OPV) devices with all solution processed transparent anodes of PEDOT:PSS/inkjet printed Ag grid were demonstrated. Through process control, the polymer/metal grid hybrid electrode films are of transparency close to 80% and sheet resistance of 48 ohms/sq. A power efficiency of 1.73% was achieved for the OPV device. The performance can be further improved by process optimization. The technology shows great potential for low-cost manufacturing of OPV solar cells.