Fig. 3: Evidence for the photo-induced free charges in PTI-LiCa.
From: Spontaneous dissociation of excitons in polymeric photocatalysts for overall water splitting
a, b Temperature-dependent photoluminescence (TD-PL) spectra from 10 K to 300 K of PTI-LiK and PTI-LiCa. c Photoconductivity dynamics comparison between PTI-LiK and PTI-LiCa. d, f 2D contour plots of femtosecond transient absorption spectra (fs-TAS) illustrating the photocatalytic dynamic process of PTI-LiK and PTI-LiCa. e, g fs-TAS spectra of PTI-LiK and PTI-LiCa, of which the time scale varies from femtoseconds to picoseconds. h Schematic diagram of exciton dissociation in the bulk of PTI-LiK and PTI-LiCa. i Comparison of reported exciton binding energy of typical polymer materials in recent years. Source data are provided as a Source Data file.
