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The Effect of Surface, Morphology, and Composition of Semiconductor Layer on the Back Reaction of Electrons in Dye Sensithized Solar Cells:Theoritical and Experimental Investigation
, Ph.D. Dissertation Sharif University of Technology ; Taghavinia, Nima (Supervisor) ; Nafari, Nasser (Supervisor)
Abstract
This thesis deals with a theoretical and experimental investigation of different approaches for reduction of electronic recombination in the semiconductor/Dye interface of dye sensitized solar cells (DSSC) including dye coverage, core-shell structures and energy level distributions. Interface of ZnO/TiO2 in the core-shell structure have been studied by density functional theory and the energy level distribution of surface atoms, recombination and Fermi level changes, open circuit voltage and surface dipole distributions have been discussed.
The presence of TiO2 shell increases the ZnO surface dipole moment, and shifts the ZnO conduction and valence bands to higher energies. Also, it...
The presence of TiO2 shell increases the ZnO surface dipole moment, and shifts the ZnO conduction and valence bands to higher energies. Also, it...