Fig. 3: Photosensitive molecules to initiate ligand cross-linking reactions.
From: Direct ambient photopatterning of RGB quantum dots for light-emitting diodes with EQE exceeding 20%
a EPR spectra of TPP without (black curve) and with (red curve) 254 nm UV irradiation. The dashed lines represent the simulated spectra of diphenylphosphine (blue dashed curve) and phenyl radicals (green dashed curve). b 1H NMR spectra of OA mixed with TPP without (black curve) and with (red curve) 254 nm UV irradiation. c Changes in the PL spectrum of probe terephthalic acid solution as the concentration of •OH is increased upon excitation at 315 nm (from down to top: 0, 0.5, 1, 3, 5, and 10 min, respectively). d Potential mechanism of the photo cross-linking between ligands of QDs.
