A Voc value of 750 mV in these nanotube solar cells is higher than the value of 620 mV for the CdS nanopillar solar cells reported earlier [14]. However it is lower than 845 mV, which is the Voc of one of the bestperforming planar solar cells [32].
A Voc value of 750 mV in these nanotube solar cells ishigher than the value of 620 mV for the CdS nanopillarsolar cells reported earlier [14]. However it is lowerthan 845 mV, which is the Voc of one of the bestperformingplanar solar cells [32].