Photoinduced Absorption Spectroscopy as a Tool in the Study of Electron Injection and Recombination in CdS quantum Dots Sensitized ZnO Solar Cell | ||
| Egyptian Journal of Solids | ||
| Article 3, Volume 33, Issue 2, December 2010, Pages 201-209 PDF (412.1 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejs.2010.148695 | ||
| Abstract | ||
| Thin films of ZnO nanoparticulate films have been prepared and modified with CdS quantum dots via chemical bath deposition technique. Photoinduced absorption spectroscopy (PIA), where the excitation is provided by a square-wave modulated (on/off) monochromatic diode light source, is a multipurpose tool in the study of dye-sensitized solar cells. Here, we use PIA as a tool for the study of a quantum-dot modified metal oxide nanostructrued electrode. Oxidized quantum dots can easily be obtained from the spectra of transient species, and their kinetics can be explored using time-resolved techniques. ZnO based CdS photoelectrode has demonstrated best performances in both photoelectrical response and broadening response into visible with a maximum IPCE of 87% at 400 nm. Time constant for electron injection or hole transfer was relatively fast (44 s) and proves at least a well pore filling of ZnO film by ultra fine CdS particles. | ||
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