Improvement of Conversion Efficiency of Inverted Organic Photovoltaic With PEDOT: PSS:WOx by Thermal Annealing

摘要

We report the effects of postannealing on the photovoltaic performance of ITO/LZO/P3HT:ICBA/PEDOT:PSS:WO /Al. The electrical characteristics of the PEDOT:PSS:WO film can be controlled through an annealing treatment, which exhibits a short-circuit current density of 9.37 mA/cm, an open-circuit voltage of 0.86 V, and a power conversion efficiency of 5.54% under AM1.5 illumination (100 mW/cm). By annealing the device at 150 °C, a favorable phase separation in the PEDOT:PSS:WO is obtained, and the PCE increases by 23.27% compared with that of the nonannealed device. The increases with the annealing temperature, and it is worth noting that the PEDOT:PSS device only experienced a 2.40% decrease in PCE after 150 °C annealing treatment.