Nanoparticle-Enhanced\nUltrathin and Ultrahigh-Definition\nColor Converted Panchromatic Microarrays for Microlight-Emitting Diode\nDisplays

Microlight-emitting diodes (Micro-LEDs) are considered\nindispensable\nfor next-generation display technologies. However, their further development\nfaces numerous challenges, such as the difficulty in achieving high-yield\nmass transfer and the use of environmentally harmful quantum dot color\nconversion techniques with suboptimal efficiency. To address these\nissues, we propose several key solutions. First, we developed nontoxic\nand environmentally stable organic–inorganic hybrid materials,\nutilizing color conversion techniques integrated with photolithography\nto replace the time-consuming and costly mass transfer process. Additionally,\nwe refined the aspect ratio and color conversion efficiency of the\nmicroarray, and optimized the fabrication process to produce color\nconversion microarrays free from nanoparticle residue and without\nthe need for protective layer curing. We successfully fabricated monochromatic\n5080 PPI and panchromatic 2540 PPI, 4 × 4 μm ultrahigh-resolution\ncolor conversion microarrays. This color conversion layer is merely\n3 μm thick, achieving green and red conversion efficiencies\nof 84.14% and 71.20%, respectively. Furthermore, the overall color\ngamut coverage reached 99.11% in the DCI-P3 standard. Stability measurements\nat 60 °C and 90% relative humidity for 10 days showed that green\nand red color conversion efficiencies decreased by less than 2%. Our\nresearch results bring further technological innovation to the field\nof micro-LED display applications.