Fig. 2: Characterization of CsPbI3 QDs.
From: Excitonic Bloch–Siegert shift in CsPbI3 perovskite quantum dots
a A representative transmission electron microscopy (TEM) image. b Steady–state absorption spectrum, with the band-edge exciton peak at ~1.98 eV. c Broadband transient absorption (TA) spectra at varying delay times, pumped at 2.64 eV (470 nm), displaying negligible photoinduced absorption in the near infrared region. Inset is a scheme showing the forbidden nature of the intra-CB transition from band-edge spin-orbit split-off states to higher-energy light and heavy electron states.
