![](https://sayre.sites.northeastern.edu/files/2020/09/Summary.png)
The Sayre Research Group designs and synthesizes broad-spectrum photocatalysts for high-energy reactions. We employ steady-state and time-resolved spectroscopy to investigate photocatalysis mechanisms. Mechanistic understanding informs design of the next generation of photocatalysts.
![](https://sayre.sites.northeastern.edu/files/2020/09/Solar-Spectrum.png)
Broad-spectrum light absorption is important for the advancement of photocatalysis. Red photons are lower energy than blue photons and are lower cost. The sun is a sustainable source of broad-spectrum light.
![](https://sayre.sites.northeastern.edu/files/2020/09/DSCF2743.jpg)
Time-resolved spectroscopy is a valuable tool to learn how light-activated chemistry occurs. We use time-resolved spectroscopy to follow the flow of energy and electrons upon light absorption.
![](https://sayre.sites.northeastern.edu/files/2020/09/CR.png)
We use our understanding of photocatalysis mechanisms to minimize deactivation pathways such as charge recombination (CR).
![](https://sayre.sites.northeastern.edu/files/2020/09/Timeline.png)
The Sayre Group designs, synthesizes, and investigates light-activated catalysts to improve photocatalysis efficiency through mechanistic understanding. We investigate photocatalysis mechanisms using a variety of spectroscopic techniques and apply mechanistic insight to design the next generation of photocatalysis systems.