| 초록 |
We have reported siloxane-encapsulated QD (Cd-based QD passivated oleic acid) resin via in situ sol-gel reaction of silane precursors in the presence of QDs, where QDs are chemically encapsulated by siloxane matrix. Photo-curable (for On-Surface) and thermal-curable (for On-Chip) QD/siloxane hybrid without ligand exchange and additional protective layers is developed for BLU application in LCD. These resins have permanent dispersion stability of QD in siloxane matrix and its cured film shows high thermal- (＞85 ℃ and 85 ℃/85 % RH) and chemical-(in acid, base, alcohol) stability. Using them, we demonstrated white light-emitting diode (LED) with wide color gamut and excellent reliability. Also, silica-modified QD through ligand-exchange improves the stabilities. Finally, we synthesized photo-patternable (~ 10 um) high QD concentration (＞ 10 wt%) in siloxane matrix. The photo-lithography of the QD ink photo-resist can fabricate QD color filters in various display applications. |
