Efficiency Improvement of Organic Photovoltaic Using Ozone and PEDOT:PSS Modifications on Ag Anode

摘要

aWe demonstrated a fabrication process using UV-Ozone treatment to obtain a qualified silver oxide (AgOx) film to be anode, and then spinning the poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) layer on the Ag/AgOx anode to smooth the its surface, resulting to efficiency improvement of the organic photovoltaic (OPV). The basic OPV structure mainly contained with a high reflective Ag anode, a semitransparent Ag cathode and a planar heterojunction small molecular active layer. Surface morphologies, roughness, reflectivity and workfunction of Ag/AgOx anode with various UV-Ozone treatment times were investigated to affect the device performance. With 60 sec UV-Ozone treatment on Ag/AgOx anode, OPV showed a good power conversion efficiency (PCE) of 0.96%. The further PEDOT:PSS lamination on 60 sec Ag/AgOx anode, OPV exhibited an advanced PCE up to 1.42%.