Improving the performance of QDSSCs based on Tio(2)/CdS (Silar)/CdSe(Colloid)/Zns(Silar) photoanodes

摘要

In this study, CdSe quantum dots (QDs) were prepared using colloidal trioctylphosphine (TOP) with an organic ligand layer and oleic acid as a capping agent, and a photoelectrode anode was prepared using CdS/CdSe QDs/ZnS thin film deposition on a TiO2 electrode via the successive ionic layer adsorption and reaction (SILAR) method. The results indicated that the short current density increased from 4.79 mA/cm(2) to 13.97 mA/cm(2) because the conduction band of the CdSe (size approximate to 3 nm) QDs became higher than that of both TiO2 and CdS. As a result, the stimulated electrons were efficiently injected into the conduction band of TiO2 and CdS. In addition, the dynamic resistance and the lifetime of stimulated electrons in the QDSSCs were investigated using Nyquist and Bode plots. (c) 2015 American Institute of Chemical Engineers Environ Prog, 34: 1774-1779, 2015