Monodispersed CdS nanoparticles (NP) are dip coated on porous ZnO thin film deposited by inkjet printing.
Optical absorption characteristics of the composite films show that the composite exhibits two main peaks centered at
355 nm due to the absorption at UV region from ZnO, and 433 nm arising from CdS NP. On UV radiations the electrical
conductivity of CdS/ZnO composite thin film with 5 dip cycles is found to be enhanced more than three orders
magnitude compared with that of the ZnO which we attribute to be the effect of interfacial charge transfer. Also, the UV
photoresponse of ZnO shows pronounced enhancement after CdS capping.
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