Charge transport characteristics in P3HT:PCBM organic blends under illumination: Influence of metal work functions

► Carrier transport property in P3HT:PCBM blend is investigated under illumination. ► Schottky thermal emission current is dominant in devices using Au or AlLi as electrode. ► SCLC with traps (filled and unfilled) is observed in devices using Al as electrode. ► The bulk trap density in P3HT:PCBM blend is evaluated by differential method.