| 초록 |
Precision patterning of quantum dot (QD) is a critical step to fabricate displays incorporating QD color filters and QD LED subpixels in form of RGB matrix. However, high-resolution patterning of solution-processed QD layers is fundamentally challenging because conventional patterning methods cannot simultaneously meet the requirements of high resolution, pattern uniformity, high throughput, and high photoluminescence quantum yield. We developed a direct, scalable, and nondestructive route for high-resolution patterning of QDs and QD LEDs. A specially designed nanocrystal ink, “photopatternable emissive nanocrystals", consists of core/shell QDs and organic photoacid generators which enable photochemically activated reactions leading to in-situ exchange of long-chain organic ligands on the QD surfaces. Uniform electroluminescence patterns of RGB QD LEDs with features size down to 1.5 µm were demonstrated while preserving the emissive properties of patterned QDs. |
