Prashant V. Kamat

Prashant V. Kamat

Karnatak University, B.S. (1972)
Bombay University, Indiana, M.S. (1974) Ph.D (1979)

view Dr. Kamat's webpage

Phone: (574) 631-5411
Email: Kamat.1@nd.edu
Office: 223B Radiation Research Building

Charge Transfer Processes and Energy Conversion


Scientific Interests

Kamat graphic

To develop fundamental understanding of energy harvesting and charge transfer processes in light harvesting assemblies with an objective to elucidate mechanistic and kinetic details and improve light energy conversion effciencies.

Quantum Dot Solar Cells

Excited state dynamics and surface chemistry of semiconductor quantum dots, designing semiconductor heterostructures for efficient charge separation and elucidation of photoelectrochemical mechanism.

Photocatalysis

Interfacial charge transfer at semiconductor and metal interface, role of metal nonoparticles as cocataysts in hotocatalysis and design of hybrid assemblies for light energy conversion.

Nanocarbon Chemistry

Electron storage and transport properties of graphene oxide and carbon nanotube based assemblies, design of multifunctional catalyst mat to improve selectivity and efficiency of photocatalytic processes.

Electrochemistry at Mesoscale

Nanostructure architectures for batteries, fuel cells and solar cells, evaluation of electrocatalytic processes and CO2 reduction.

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Recent Accomplishments

One of the possibilities to engineer the light harvesting features over a broader region and utilize the photons more effectively is to develop a tandem structure of semiconductor QDs such that the absorption of photons within the film is carried out in a systematic and gradient fashion. The photoactive anode prepared by depositing 4.5 nm CdSe quantum dots within the mesocopic film of TiO2 exhibited an increased power conversion efficiency of 3.2 - 3.0% in a two- and three-layered tandem QDSC as compared to 1.97% - 2.81% with single-layered CdSeS.

Electron and energy transfer rates from photoexcited CdSe collodial quantum dots (QDs) to grahpene oxide (GO) and reduced graphene oxide (RGO) were isolated by analysis of excited state deactivation lifetimes as a function of degree of oxidation and charging on GO. Apparent rate constants for energy and electron transfer determined for CdSe-graphene oxide composites were 5.5 x 108 s-1 and 6.7 x 108 s-1 respectively. Additionally, incorporation of graphene oxide in collodial CdSe QD films deposited on conducting glass electrodes was found to enhance the charge separation and electron conduction through the QD film, thus allowing three-dimensional sensitization.

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Selected Publications

Manser, J.S., M.I. Saidaminov, J.A. Christians, O.M. Bakr, P.V. Kamat. "Making and Breaking of Lead Halide Perovskites." Acc. Chem. Res. 49 (2016): 330-338. link

Alam, R., M. Labine, C. J. Karwacki, P.V. Kamat. "Modulation of Cu2-xS Nanocrystal Plasmon Resonance through Reversible Photoinduced Electron Transfer." ACS Nano 10 (2016): 2880-2886. link

Draguta, S., S. Thakur, Y.V. Morozov, Y. Wang, J.S. Manser, P.V. Kamat, M. Kuno. "Spatially Non-uniferm Trap State Densities in Solution-Processed Hybrid Perovskite Thin Films." J. Phys. Chem. Letter (2016): 715-721. link

Chen, Y.-S., J.S. Manser, P.V. Kamat. "All Solution-Processed Lead Halide Perovskite-BiVO4 Tandem Assembly for Photolytic Solar Fuels Production." Journal of the American Chemical Society 137 (2015): 974-981. link

Christians, J.A., P.A. Miranda Herrera, P.V. Kamat. "Transformation of the Excited State and Photovoltaic Efficiency of CH3NH3Pbl3." Journal of the American Chemical Society 137 (2015): 1530-38. link

Choi, H., Y.-S. Chen, K.G. Stamplecoskie, P.V. Kamat. "Boosting the Photovoltage of Dye-Sensitized Solar Cells with Thiolated Gold Nanoclusters." The Journal of Physical Chemistry Letters 6 (2015) 217-23. link

Manser, J.S., P.V. Kamat. "Band Filling with Charge Carriers in Organometal Halida Perovskites." Nature Photonics 8 (2014): 737-43. link

 

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