Fig. 4From: Simulation Analysis on Photoelectric Conversion Characteristics of Silicon Nanowire Array PhotoelectrodesEnergy band diagrams. a Along the NW axial direction. b Along the NW radial direction. Solid (broken) lines are the energy levels of conduction (valence) bands. Along the arrow, the N d is 2.19 × 1014, 2.34 × 1015, 3.07 × 1016, 4.0 × 1017, and 1.31 × 1018 cm−3, respectivelyBack to article page