Fig. 2: Binding energy of different ligands and properties of synthesized CsPbI3 QDs. | Nature Communications

Fig. 2: Binding energy of different ligands and properties of synthesized CsPbI3 QDs.

From: Stable and efficient CsPbI3 quantum-dot light-emitting diodes with strong quantum confinement

Fig. 2

a Calculated binding energy of oleic acid (OA), oleylamine (OA), 2-naphthalenesulfonic acid (NSA) and hexafluorophosphate (NH4PF6) ligands through DFT (b) schematic diagram of NH4PF6 ligand exchange process during purification including comparison of TEM image (scale bar 50 nm), absorption spectra and photoluminescence (PL) spectra of different QDs (c) Time-resolved photoluminescence (TRPL) decay of OA/OAm QDs and NSA-NH4PF6 QDs films. d Photoluminescence quantum yield (PLQY) variation of QDs solution after different storage times.

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