Extended Data Fig. 6: Optical properties of the Sn perovskite films.
From: Tautomeric mixture coordination enables efficient lead-free perovskite LEDs
a, PL spectra of the Sn perovskite films with various CA content. b, Logarithm curves of absorption coefficient (α) versus photon energy, the EU for the pristine and the treated sample are estimated. c, Visible absorption spectra of the Sn perovskite films with various CA content. d, TRPL spectra of the TEA2SnI4 films prepared with and without 5% CA. e, Non-radiative recombination coefficients B for the single-carrier devices with and without CA treatment, the dashed line indicates the condition of room temperature. f, Excitation-intensity-dependent PLQYs of the perovskite films with different CA content.
