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The Congreve Lab is moving to Stanford!

11/11/2019

 
We're moving west! Dan has accepted a position as Assistant Professor of Electrical Engineering starting in Fall 2020. We will be accepting graduate students and postdocs for the lab - interested students should get in touch with congreve@rowland.harvard.edu and see the Apply tab for more information. 
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Upconversion Photochemistry published in Nature!

2/2/2019

 
Our recent work studying the application of upconversion to photochemistry has been published in Nature! In collaboration with the Campos and Rovis groups at Columbia, we show that you can run a number of photochemistry reactions powered by near infrared light instead of visible by adding upconversion to the process. The addition of upconversion allows for a deeper penetration depth and opens the door towards in vivo applications, as evidenced by driving a reaction through bacon with a near infrared laser. Congrats to Andrew and Ben on the excellent work!

The work can be found here: ​https://www.nature.com/articles/s41586-018-0835-2
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New Blue and White LEDs Published in Joule

9/13/2018

 
Our new LEDs are published in Joule! Perovskite materials have the potential to be great LEDs, as very efficient red and green devices have been developed. Yet in order to be used in applications such as TVs and phones, blue LEDs are also required, and these have lagged far behind. We have figured out a surprising way to fix these materials: by adding a dopant, their brightness and efficiency counter-intuitively increase, leading to the highest efficiency blue perovskite LEDs yet demonstrated for lighting applications and showing that these blue materials can be competitive with their red and green cousins. Finally, we also used downconverters at the front of the LED to build an all-perovskite white LED that could someday be used for room lighting.

This work is published in Joule: https://doi.org/10.1016/j.joule.2018.08.005

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Outreach at the Museum of Science

7/19/2018

 
The Congreve Lab joined others from the Rowland Institute to take part in scientific outreach at the Museum of Science. This entailed presenting scientific demos introducing concepts about nanotechnology and the nanoscale to museum visitors. It was a great time for all involved! Kids already have such a passion for science - we're excited to see them in the lab soon!

Welcome Sam Sanders!

7/12/2018

 
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The Congreve Lab continues to grow! Sam Sanders from Columbia University has joined our group to work on upconversion materials and applications. Sam graduated from the University of North Carolina at Chapel Hill in 2013 with a BS in polymer chemistry, and received his Ph.D. in chemistry from Columbia University in 2018 where he worked for professor Luis Campos and Dr. Matt Sfeir from Brookhaven National Lab. His research focuses on the control and application of excitons. Welcome Sam!

Kealan Fallon wins Fulbright Award

5/22/2018

 
Kealan Fallon, a postdoctoral research associate from the University of Cambridge has received a Lloyd’s of London Fulbright Award to enable him to research at Columbia University and in the Congreve Lab at the Rowland Institute at Harvard University on one of the most well-regarded and impactful scholarship programs in the world.

As a participant, Kealan has been selected to undertake pioneering interdisciplinary research on improving the efficiency of solar energy technologies. High energy light that is typically wasted in traditional solar cells can be split in half by some materials, creating two excitations of useable energy from a single photon. Only a handful of materials are known to be able to do this, and Kealan’s research will investigate the complex mechanisms of the process with the aim to construct design rules to direct the creation of next-generation solar devices.

Kealan grew up in London where he studied his undergraduate masters degree at University College London (2013). He stayed at UCL for his doctoral studies where he researched novel conjugated organic materials for applications in plastic electronics under Dr Hugo Bronstein. After receiving his PhD in 2017, Kealan moved to the University of Cambridge with the Bronstein group for a postdoc before being awarded a Lloyd’s of London – Fulbright Scholar Award by the UK-US Fulbright Commission and Lloyd’s Tercentenary Research Foundation. His interdisciplinary fellowship will focus on multi-excitonic processes in solar devices and will be split between materials synthesis at Columbia University and device fabrication at the Rowland Institute.

Kealan will start in July 2018. Congratulations and welcome, Kealan!

New Research Published in Advanced Materials

3/25/2018

 
Our most recent work has been published in Advanced Materials! Focusing on blue nanocrystal pervoskite LEDs, we demonstrate that the surrounding transport layers play a crucial role in nanocrystal luminescence. By fixing the transport layers, we can increase the external quantum efficiency of the device from 0.03% to 0.50%. More can be found at the link, and pretty pictures can be found at right! 
​https://onlinelibrary.wiley.com/doi/abs/10.1002/adma.201706226
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Welcome Abdeljaleel Ismail!

1/17/2018

 
Jaleel Ismail is joining the Congreve Lab as an undergraduate researcher. He is a freshman at Harvard University studying Biomedical Engineering and English. He is from Marietta, Ohio, where he was the Editor in Chief of the Original Paper and Team Captain of the Varsity Crew team. His current interests include writing and poetry, film, and working at the Harvard Crimson. ​

Jaleel will be studying perovskite crystal formation and kinetics. See ​https://www2.rowland.harvard.edu/news/congreve-lab-receives-2018-rowland-foundation-postdoctoral-fellow-and-undergraduate for more!
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Mahesh is awarded theĀ 2018 Rowland Foundation Postdoctoral Fellow and Undergraduate Program Award

1/1/2018

 
Mahesh Gangishetty, a postdoc in our lab, has been awarded the 2018 Rowland Foundation Postdoctoral Fellow and Undergraduate Program Award! Mahesh will work directly with an undergraduate student to provide mentorship and training in opto-electronic devices. Congrats Mahesh!
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