The XYZ Lab at Columbia University

Light-matter interaction, solar energy conversion, ultrafast spectroscopy

Group members | Publications

Research highlights

We are interested in the general problem of light-condensed matter interaction. A main research thrust is to establish new photophysical mechanisms that may be utilized to revolutionize solar energy conversion or light emission. As examples, recent discoveries in our lab showed how an electron and a hole is bound by the Coulomb potential across an organic semiconductor interface, how an exciton can split into two via the singlet fission process, and how hybrid semiconductors can yield the highest possible quantum efficiency in light emission.

perovskite nanowire lasers

time resolved SHG

NOPA lasers
Hybrid semiconductor for efficient light absorption/emission

J. Am. Chem. Soc. 137, 2089 (2015).
Nature Mater.
14,  (2015). published online 4/13/2015.

Singlet fission in organic semiconductors

Nature Chem. 4 , 840 (2012).
Science
334, 1541 (2011).

Hot carrier & manybody interaction in  quantum confined semiconductors:

Nano Lett. 13 , 6091 (2013).
Science
328, 1543 (2010).

Charge transfer excitons at van der Waals interfaces:

Nature Mater. 12, 66 (2013).
Phys. Rev. Lett. 101,
196403 (2
008).

XYZ Lab News

4/2014: Congratulations to Dr. Wesker Lei who successfully defended his PhD thesis.

5/2014: Dr. Haiming Zhu joins the group as a postdoctoral fellow. He comes to us with a PhD in Chemistry from Emory University.

7/2014: Congratulations to Dr. Loren Kaake who joins Simon Fraser University in Canada as an Assistant Professor of Chemistry.

7/2014: Congratulations to Dr. Josh Morris. who joins Georgia Gwinnett College as an Assistant Professor of Chemistry.

9/2014: Congratulations to Dr. Martin Gustafsson whose groundbreaking paper just came out in Science 346, 207 (2014).

10/2014: Congratulations to Xinjue Zhong, who was awarded the prestigious Rutgers Fellowship for her outstanding performance in graduate studies in physical chemistry.

11/2014: Prakriti Joshi, Jue Wang, and Kihong Lee joined the group.

4/1/2015: Dr. Kiyoshi Miyata joins the group as a postdoc. Kiyoshi comes to us from Kyoto University.