Research proposalElena KhonThe development and optimizing the performance of high efficient prototype solar cells
Problem: Energy crisis I propose work that will target: • the development of colloidal chemistries for growing semiconductor nanocrystals onto substrate-bound oxides, • elucidating the nature of interfacial charge transfer and heterojunction stoichiometry though ultrafast optical spectroscopy, and advanced electron microscopy imaging techniques, • optimizing the performance of prototype solar cells comprising fabricated composite nanomaterials.
Highest efficiency of nano-composit solar cells known nowadays is 5.1%
Charge Separation in Nano-composites Conduction band Conduction and valence band Valence band
Schematics of photovoltaic device hetero-epitaxial NC/oxide nano-composites
Electronic energy level of each material layer in a NC-sensitized solar cell comprising a solid hole conductor. Vertical bars represent size-dependent band edge energies for several semiconductor NCs.
Primary goal and expected result The increasing of the efficiency of photovoltaic device achieved through understanding of growth kinetics of each nanocrystal/oxide system, the development of large-scale and well-controlled synthesis of durable nanostructures, and optimization of device performance
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