Extended Data Fig. 7: Photophysical characterization of TEA2SnI4 films.
From: Tautomeric mixture coordination enables efficient lead-free perovskite LEDs
a, The fitted curves of the integrated PL intensity as a function of 1/T for the perovskites with and without CA. b, Kinetic traces at a probing wavelength of 615 nm for the Sn perovskite films with and without CA. c, d, Pseudo-color maps of femtosecond-transient absorption spectra of the pristine (c) and the sample with 5% CA (d) under an excitation wavelength of 400 nm.
