Fig. 2: Surface ligands to passivate QDs via surface protection.
From: Direct ambient photopatterning of RGB quantum dots for light-emitting diodes with EQE exceeding 20%
a Photos of red, green, and blue-emitting QDs-TPP under visible light and UV light. b Absorption (solid lines) and PL (dashed lines) spectra of red, green, and blue-emitting QDs-TPP. c Comparison of PLQYs of red (d), green (e), and blue (f)-emitting QDs and QDs-TPP. Time-resolved PL decay profiles of red, green, and blue-emitting QDs solution before and after treatment with TPP. g A TEM image of CdSe/ZnS QDs-TPP. Scale bar, 100 nm. h FTIR spectra of pristine CdSe/ZnS QDs (red curve), TPP (green curve), and CdSe/ZnS QDs-TPP (blue curve). i 31P NMR spectra of free TPP (black curve), TPP-Se (red curve), bare CdSe QDs-TPP (blue curve).
