Interconnected TiO2 Nanowire Networks for PbS Quantum Dot Solar Cell Applications

Figure 4

Comparison of the current density-voltage (J-V) characteristics under illumination for a standard PbS quantum-dot-sensitized TiO₂ heterojunction solar cell using a planar TiO₂ film formed by conventional sol-gel chemistry with the same solar cell using our thick nanoporous interconnected TiO₂ nanowire network previously deposited on a thin planar TiO₂ film. Both devices are measured under a uniform 8.5 mW/cm² white-light illumination. The inset shows the dark I-V characteristics for both devices.