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Abstract
Quantum dots' sensitized solar cells (QDSSCs) can create the high-performance and low-cost photovolta- ic in the future. In this study, we synthesized the film of TiO2/CdS/CdSe/ZnS photoanodes by successive ionic lay- er adsorption reaction (SILAR) method. The absorption spectra, photoluminescent spectra and electrochemical im- pedance spectra (EIS) of the film TiO2/CdS/CdSe/ZnS photoanodes show that the structure of energy levels in the conduction band (CB) of photoanode materials CdS, CdSe, and ZnS quantum dots (QDs) can absorb a great number of photons in each region and inject stimulated electrons quickly into the conduction band (CB) of TiO2. Furthermore, we also studied the influence of the SILAR cycles on the dynamic resistance, the lifetime of electrons in QDSSCs through Nyquist and Bode.
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