The latest development of photoactive thin film often resulting in the anisotropic formation of wide ban gap oxide nanostructure on the flat surface. Although there are obvious advantages from this non-even surface provided through more surface area contact, it is a great challenge to introduce inorganic sensitizer as secondary component of the thin film using conventional electrodeposition, moreover if it involved ternary semiconductor.

This article demonstrated the use of pulsing electrodeposition technique as an effective tool to regulate the uniform coating of ZnO nanorod arrays with visible light active CuInS2 nanoparticles. The frequency tuning has demonstrated its effectiveness in balancing the diffusion and deposition of the CuInS2 on the ZnO substrate. The high quality heterojunction between CuInS2 and ZnO2 together with its intimate interaction facilitated efficient charge shuttling from CuInS2 to ZnO to yield four-fold visible light response compared with the traditionally made CuInS2-ZnO nanostructures.

Read more  (J. Materials Chemistry A, 2015, advanced article, doi:10.1039/C5TA03255E)

High quality coating of vertically aligned ZnO nanorods with CuInS2 nanoparticles is