"Welcome to The Prashant Kamat lab at the University of Notre Dame! With the help of internal and external collaborations we have established a successful multidisciplinary research program in nanostructure architectures and energy conversion processes." - Prashant Kamat


Kamat Lab News


Friday, February 5, 2016Posted by Christian Talavera

Dr. Catherine Murphy Delivers Inorganic Seminar at Notre Dame

Dr. Murphy Visits Notre Dame

Dr. Catherine J. Murphy is the Peter C. and Gretchen Miller Markunas Professor of Chemistry at The University of Illinois at Urbana-Champaign. She delivered the Inorganic Chemistry seminar today at Notre Dame titled "Gold Nanocrystals: Physics, Chemistry, Biology and Ecology." Pictured from left to right are Christian Talavera, Rabeka Alam, Dr. Catherine J. Murphy, and Yong-Siou Chen. We had the pleasure of having lunch with Prof. Murphy. Make sure to visit her website to learn more about her exciting research!

Friday, January 29, 2016Posted by Christian Talavera

Evolution of Chemical Composition, Morphology, and Photovoltaic Efficiency of CH3NH3PbI3 Perovskite under Ambient Conditions

Read the latest paper from the Kamat Lab!

Evolution of Chemical Composition, Morphology, and Photovoltaic Efficiency of CH3NH3PbI3 Perovskite under Ambient Conditions

Evolution of Chemical Composition, Morphology, and Photovoltaic Efficiency of CH3NH3PbI3 Perovskite under Ambient Conditions

Abstract: The surface composition and morphology of CH3NH3PbI3 perovskite films stored for several days under ambient conditions were investigated by X-ray photoelectron spectroscopy, scanning electron microscopy, and X-ray diffraction techniques. Chemical analysis revealed the loss of CH3NH3+ and I- species from CH3NH3PbI3 and its subsequent decomposition into lead carbonate, lead hydroxide, and lead oxide. After long-term storage under ambient conditions, morphological analysis revealed the transformation of randomly distributed defects and cracks, initially present in the densely packed crystalline structure, into relatively small grains. In contrast to PbI2 powder, CH3NH3PbI3 exhibited a different degradation trend under ambient conditions. Therefore, we propose a plausible CH3NH3PbI3 decomposition pathway that explains the changes in the chemical composition of CH3NH3PbI3 under ambient conditions. In addition, films stored under such conditions were incorporated into photovoltaic cells, and their performances were examined. The chemical changes in the decomposed films were found to cause a significant decrease in the photovoltaic efficiency of CH3NH3PbI3.

Wednesday, January 27, 2016Posted by Christian Talavera

Congratulations Jacob!

Jacob Wins Fellowship

Fourth-year graduate student Jacob Hoffman has been selected to receive the 2016 Patrick and Jana Eilers Graduate Student Fellowship for Energy Related Research. This was a competitive year for the fellowship, so congratulations Jacob on this outstanding achievement!






Thursday, January 21, 2016Posted by Christian Talavera

Congratulations Dr. Prashant V. Kamat!

Prashant belongs to the top 1 percent of highly cited scholars

Thomson Reuters has named our very own Dr. Prashant V. Kamat among the top 1 percent of highly cited scholars. He was also named in previous years including the 2014 list. Congratulations Prashant on another successful year!






Friday, January 8, 2016Posted by Sebastian Snowberger

Kamat Lab 2015 Annual Report

Kamat Lab Group 2015

Happy New Year! The 2015 Annual Report for the Kamat Lab has just been uploaded, highlighting our accomplishments in 2015. Thanks to all the graduate students, postdocs, undergrads, visiting scientists, and other collaborators for making this possible; and congratulations to everyone on their achievements and accomplishments! See the attached report for details, and here's hoping for an even better 2016!

Monday, November 30, 2015Posted by Sebastian Snowberger

Bill Gates Energy Innovation Paper references Kamat Lab!

Bill Gates Energy Innovation

While attending the international conference on climate change and energy, Bill Gates published a blog post detailing specifics on Mission Innovation and the Breakthrough Energy Coalition, two initiatives backed by Gates with the intent to invest in innovative ideas for renewable energy from the lab to the marketplace. Alongside the less formal post, he published a brief paper on Energy Innovation, which gave an overview of the current state of research and marketing in the field. The paper closed with three examples of "Promising Research", the last of which was the Kamat Lab's solar paint project! Follow the link below to read the blog post, which includes the Energy Innovation article.

Wednesday, June 24, 2015Posted by Sebastian Snowberger

LAB RATS WIN! LAB RATS WIN!

Summer 2015 Softball Game 1

After a grueling offseason full of chemistry, publishing and conferences, the Rad Lab Lab Rats shed their nitrile gloves and safety glasses for softball gloves and shades last night for the first game of the annual intramural softball season. The Lab Rats took on the formidable and reigning softball champs the Cap'n Crunch Cereal Killers. We got straight to work in the first inning with Kevin blasting our first home run of the night deep into right field going up by two runs. With bases loaded and butts out of seats, Joe took to home plate and cranked out yet another home run in the first for a grand slam putting the Lab Rats up 6-0. Our defense ran the field and held the Cereal Killers to just one run after some fancy acrobatics by our outfielders Steve and Mark. After all that excitement in the first, we kept quiet in the second inning and regrouped while holding the Cereal Killers to what would be their last run of the game. Top of the third saw our very own, Korean grown lefty allstar Joon take to home plate with Sooraj on base. While he may have been unsure which side of home plate to stand on or how to hold the bat, that didn't stop him from hitting a grounder to the infield and setting Ken up for our third homerun of the night putting the Lab Rats up 9-2. After we scored 4 more runs and had some fancy glove work by Maj-Britt at third base, the Cereal Killers admitted defeat after 5 innings giving the Lab Rats their second victory in franchise history at 13-2. We're happy to report that everyone in our batting line-up connected, even Tessa from Ireland confusing softball for Rounders, striking fear in the heart of all of our opponents. Come on out to the West Quad fields behind Hammes Bookstore next Tuesday at 6:30 as the Lab Rats take on Team EM!

Monday, June 1, 2015Posted by Sebastian Snowberger

Multifaceted Excited State of CH3NH3PbI3. Charge Separation, Recombination, and Trapping

Read the latest paper from the Kamat Lab!

Multifaceted Excited State of CH3NH3PbI3. Charge Separation, Recombination, and Trapping

Multifaceted Excited State of CH<sub>3</sub>NH<sub>3</sub>PbI<sub>3</sub>. Charge Separation, Recombination, and Trapping

Abstract: A need to understand the excited-state behavior of organic–inorganic hybrid perovskites, such as CH3NH3PbI3, has arisen due to the rapid development of perovskite solar cells. The photoinduced processes leading to the efficient charge separation observed in these materials remain somewhat elusive. This Perspective presents an overview of the initial attempts to characterize the excited-state and charge recombination dynamics in the prototypical material CH3NH3PbI3. While much has been accomplished in designing high-efficiency solar cells, the multifaceted nature of the CH3NH3PbI3 excited state offers ample challenges for the photovoltaic community to better comprehend. Building on this foundation may enable us to tackle the stability concerns that have shadowed the rise of perovskite solar cells. Furthermore, a better understanding of the excited-state properties can provide insight into the specific properties that have thrust this material to the forefront of photovoltaic research.

Thursday, May 7, 2015Posted by Sebastian Snowberger

Synergistic Effects in the Coupling of Plasmon Resonance of Metal Nanoparticles with Excited Gold Clusters

Read the latest paper from the Kamat Lab!

Synergistic Effects in the Coupling of Plasmon Resonance of Metal Nanoparticles with Excited Gold Clusters

Synergistic Effects in the Coupling of Plasmon Resonance of Metal Nanoparticles with Excited Gold Clusters

Abstract: When molecules or clusters are within the proximity of metal particles, their electronic transitions can be drastically enhanced. We have now probed the off-resonance excitation of molecule-like, glutathione-capped gold clusters (Au-GSH) in the close proximity of larger (plasmonic) Au and Ag nanoparticles. The excited state absorption spectrum of Au-GSH* is obtained with monophotonic excitation. The characteristic absorption of Au-GSH* allows us to probe the influence of excited plasmonic nanoparticles coupled with the clusters. Although infrared (775 nm) lasers pulses do not produce Au-GSH*, the excited states of these clusters are formed when coupled with metal (Au, Ag) nanoparticles. Interestingly, the coupled excitation of Au-GSH/AgNP with 775 nm laser pulses also results in an enhanced field effect, as seen from increased plasmon response of the metal nanoparticles. Transient absorption measurements confirm the synergy between these two inherently different nanomaterials, causing them to display greater excitation features. Better understanding of metal cluster–metal nanoparticle interactions will have important implications in designing light harvesting systems, and optoelectronic devices.

Thursday, April 23, 2015Posted by Sebastian Snowberger

Congratulations to Dr. Jeffrey Christians and Dr. Douglas Hines!

Congratulations to Dr. Jeffrey Christians and Dr. Douglas Hines!

Congratulations to graduate students Jeffrey Christians and Douglas Hines, who completed their Ph.D.s in Chemical and Biomolecular Engineering and Chemistry, respectively!

Jeff successfully defended his thesis entitled:

Mesostructured Thin Film Solar Cells: Examining Hole Transfer Mechanisms and Device Stability,

and was awarded the Eli J. and Helen Shaheen Graduate School Award in the Division of Engineering.

Doug successfully defended his thesis entitled:

Excited State Reactions at the Quantum Dot Surface,

and was awarded the Eli J. and Helen Shaeen Graduate School Award in the Division of Science.

Congratulations for completion of your Ph.D.s and having your excellent work recognized by the Graduate School!


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