fig3
Figure 3. (A) Variation of (αhν)2 with photon energy (hν) of PEI and CdS. (B) UPS measurement of (b1) the cutoff region and (b2) the HOMO region for the PEI and CdS. (C) Schematic representation for band structure of PEI and CdS, with EAP denoting the electron affinity of PEI and EAC representing electron affinity of CdS. (D) The energy band diagrams on the interfaces of Electrode-PEI-CdS.
