Fig. 2: The interaction mechanism between 5-AVA and perovskite. | Nature Communications

Fig. 2: The interaction mechanism between 5-AVA and perovskite.

From: Sequential layer-by-layer deposition for high-performance fully thermal-evaporated red perovskite light-emitting diodes

Fig. 2: The interaction mechanism between 5-AVA and perovskite.The alternative text for this image may have been generated using AI.

a FTIR spectra of pure 5-AVA and 5-AVA+PbI2 mixture, where the characteristic C=O stretching vibration peak is marked by gray squares. b, c XPS spectra of (b) Pb 4 f and (c) I 3d for perovskite thin films w/ 5-AVA and w/o 5-AVA. d 13C NMR spectra of pure 5-AVA and 5-AVA+PbI2 mixture. The gray squares highlight the characteristic peaks of 5-AVA. e SCLC measurements of the only-hole devices. f The trap density of states (tDOS) spectra of perovskite thin films.

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