Over 1500 PPI quantum dot color conversion array by lift‐off

Abstract This study explores the application of lift‐off process for the patterning of quantum dot (QD) pixels using CdSe/ZnS core‐shell colloidal QDs. The evaluation of the influence of different solvent and binder systems on the effectiveness of the pixelation is detaily discussed. By optimizing the solvent and binder combination, the fabrication of multi‐color QD patterns with pixel sizes ranging from 5 to 200 μm were demonstrated, achieving blue light conversion efficiencies exceeding 18% and 25% for red and green pixels. It is also improved pixel uniformity, stability, and resolution, lying the foundation for the development of ultra‐high‐resolution, QD Micro‐LED display. However, challenges remain in maximizing the utilization of blue light and packaging of QD layers. Future research will aim to develop high‐quality QD inks suitable for photoresist lift‐off and optimize the QD Micro‐LED system to further enhance the performance and stability of QD‐based displays.