| 초록 |
A new idea to architect photoanodes using known materials to enhance the photocurrent density for photoelectrochemical water splitting has been demonstrated by introducing the deposition of gold (Au) on reduced graphene oxide (rGO)-coated CdS thin films. Here, we have developed an optimized annealed CdS thin film in an inert atmosphere through modified chemical bath deposition (CBD), which was then followed by sequential deposition of rGO and Au by the spin-coating method. The morphology, structure and optical and vibrational properties, which were examined by SEM, XRD and UV-Vis, PL and Raman spectroscopy, were found to be in good correlation with the photoelectrochemical analysis of the CdS and Au-rGO@CdS samples. The Au-rGO-coated optimized annealed CdS thin film showed a high current density of 5 mA/cm2 at 0 V (vs SCE), which is approximately 3.5 times that of the as-prepared CdS thin film. The reason for the increase in the value of the highest photocurrent density has been investigated and discussed elaborately through extensive photoelectrochemical characterization. |
