Ultrahigh-resolution full-color micro-LED array with enhanced efficiency based on a color conversion technique

Micro-light emitting diodes (mu LEDs) with remarkable advantages are becoming mainstream in next-generation display technologies such as augmented reality/virtual reality displays. However, further development of mu LEDs still faces significant challenges, including mass transfer yield. Here, we report color conversion layer (CCL)-based, fullcolor, highly efficient mu LED arrays as a solution to address this challenging issue. Further amalgamating CCL with color purity enhancement film enables us to realize 7 mu m x 7 mu m subpixel fluorescent arrays with a color gamut of 95.34% in DCI-P3, resulting in an overall 1588 PPI (pixel per inch). Our results provide a promising technique for fabricating higher PPI-based next-generation display technology. (c) 2023 Chinese Laser Press