Fig. 4: Photophysics characterization of the drop-cast films.
From: Crystallisation control of drop-cast quasi-2D/3D perovskite layers for efficient solar cells
a Time-resolved photoluminescence decay (excitation: 400 nm; emission: >700 nm) and b TA spectra at a delay time of 2 ps (excitation: 510 nm) for iso-BA-2D perovskite films on glass prepared by N2 blow-drying with and without MACl additive. For TRPL measurements, sample excitation and emission detection was from the glass (back) face. For TA, laser excitation was incident on the glass (back) face.
