Professor Kelley's research uses the laser light scattering techniques of resonance Raman and hyper-Raman spectroscopy to study the atomic-level details of how materials interact with light. These studies reveal the detailed mechanisms of fast photochemical reactions such as those involved in human vision, photography, xerography, and solar energy conversion. Her group carries out experiments and also develops theoretical and computational tools for analyzing the data. Currently, her work focuses on using these techniques to understand how the vibrations (phonons) of semiconductor nanocrystals influence and are influenced by, absorption and emission of light in these materials.