Figure 4

I–V characteristics of the sandwiched Si-ncs/P3HT bulk-heterojunction in the dark and under illumination at AM1.5 after annealing at 140 °C. TheI–V characteristics were taken from the blend sandwiched on solid nonporous substrate (a) and within TiO₂nanotube arrays with the diameters of 50 nm (b) and 90 nm (c), respectively. TheI–V characteristics of pure polymer are shown for comparison