Model of PS/Ox/FTO heterojunction. Proposed equivalent circuit (a). Two opposite diodes with photocurrent sources are connected in parallel to another diode. Parallel and series resistance are also included. Schematics of PS/Ox/FTO heterojunction and the interfaces associated to each diode in the equivalent circuit (b).
Garcés et al. Nanoscale Research Letters 2012 7:419 doi:10.1186/1556-276X-7-419