PGS Lab

Photovoltaic Devices

We demonstrate sensitive thermal imaging with HgTe colloidal quantum dot (CQD) photovoltaic detectors by integrating the HgTe CQDs with plasmonic structures. A detectivity of 4 E 11 Jones is achieved at 80 K.

Mid-Wave Infrared Photodetectors

Using a modified PV device architecture, we report up to 2 orders of magnitude improvement in the sensitivity of the HgTe CQD photodetectors

Slow Auger Relaxation in HgTe CQDs

The biexciton lifetimes in HgTe colloidal quantum dots are measured as a function of particle size.

Synthesis of HgTe CQDs

Nonaggregating HgTe colloidal quantum dots are synthesized without thiols as stabilizing ligands. The dots are spherical with a size tunability from 4.8 to 11.5 nm.

Electrochemistry of Colloidal Quantum Dot Films

The absolute positions of the energy levels of colloidal quantum dots of Hg(S, Se, Te), which are of interest as mid-infrared materials, are determined by electrochemistry.

News

Welcome to Xingyu Shen, who joins the group as a first year student!

Chris’s review article on many-body dynamics is published in Chemical Reviews!

Matt receives the William E. Spicer – Thomas N. Casselman Award

Congratulations to Matt for his award for best student paper at the U.S. Workshop on the Physics and Chemistry of II-VI Materials (a.k.a. the II-VI workshop)!

Xin and Matt’s paper highlighted as a “breakthrough for infrared camera technology”

Xin and Matt devised a detector using quantum dots tuned to detect different parts of the infrared spectrum, allowing dual-band infrared imaging. You can read more about it in this UChicago News article, and the technical paper was published in Nature Photonics.

Menglu Receives The Yodh Prize

Congratulations to Menglu! She has been awarded the Yodh Prize for outstanding graduate work in experimental physics.

Matt Receives The Elizabeth R. Norton Prize

Congratulations to Matt! He has received the Elizabeth R. Norton Prize for excellence in chemistry research.