Figure 4 (a) Transmittance spectra of CdS nanotubes embedded
in the AAO membrane. (b) Simulated photon flux that is absorbed
by the nanotube CdS-CdTe solar cell. (c) Relative EQE of the 3D
nanostructured CdS-CdTe solar cells.
This beneficial effect is further elucidated through the
use of the AM 1.5D spectrum to measure the absorption
spectrum of the CdS nanotubes by simulating a photon
flux (P), which can be converted to carriers in the
nanotube solar cells.