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Research proposal Elena Khon The 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,

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Research proposalElena KhonThe development and optimizing the performance of high efficient prototype solar cells


Problem energy crisis
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
Highest efficiency of nano-composit solar cells known nowadays is 5.1%


Charge separation in nano composites
Charge Separation in Nano-composites

Conduction band

Conduction and

valence band

Valence band



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
Primary goal and expected result NC-sensitized solar cell comprising a solid hole conductor. Vertical bars represent size-dependent band edge energies for several semiconductor NCs.

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


References NC-sensitized solar cell comprising a solid hole conductor. Vertical bars represent size-dependent band edge energies for several semiconductor NCs.

Pattantyus-Abraham, A. G.; Kramer, I. J.; Barkhouse, A. R.; Wang, X.; Konstantos, G.; Debnath, R.; Levina, L.; Raabe, I.; Nazeeruddin, M. K.; Gratzel, M.; Sargent, E. H.: Depleted-Heterojunction Colloidal Quantum Dot Solar Cells. ACS Nano2010, 4, 3374.

Grätzel, M.: Conversion of Sunlight to Electric Power by Nanocrystalline Dye-Sensitized Solar Cells. J. Photochem. Photobiol. A2004, 164, 3.

Schmidt-Mende, L.; Grätzel, M.: TiO2 Pore-Filling and Its Effect on the Efficiency of Solid-State Dye-Sensitized Solar Cells. Thin Solid Films2006, 500, 296.

Acharya, K. P.; Hewa-Kasakarage, N. N.; O’Conner, T.; Nemitz, I.; Klinkova, A.; Anzenbacher, P.; Zamkov, M.: Nanocrystal-Sensitized Solar Cells Based on Hot-Injection Growth of PbSSensitizer Onto Mesoporous TiO2 Films. Submitted, 2010.

Casavola, M.; Buonsanti, R.; Caputo, G.; Cozzoli, P. D.: Colloidal Strategies for Preparing Oxide-Based Hybrid Nanocrystals. Eur. J. Inorg. Chem. 2008, 837.


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