Author:
Tiwari Vandana,Duan Hong-Guang,Jha Ajay,Nayak Pabitra K.,Thorwart Michael,Snaith Henry J.,Miller R. J. Dwayne
Abstract
We have employed ultrafast transient-grating and two- dimensional electronic spectroscopy to probe dynamics of photo-excited CH3NH3PbI3 thin films with 16-fs temporal resolution. We distinctly capture the 30-fs decay of excitons, weakly coupled to the phonons.