Advanced Full-Color Perovskite Nanocrystal Patterning for Next-Generation Ultrathin Skin-Attachable Displays
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We present a novel ultrahigh-resolution perovskite nanocrystal (PeNC) patterning technique for ultrathin wearable displays. Our method employs double-layer transfer printing to layer PeNCs and organic charge transport layers, preventing internal cracking and achieving RGB pixelated patterns at 2550 PPI and monochromatic patterns at 33,000 line pairs per inch. The resulting perovskite light-emitting diodes (PeLEDs) display exceptional electroluminescence, with quantum efficiencies significantly higher than previously reported printed PeLEDs. This technology enables the creation of flexible, multicolor PeLEDs that adhere to curvilinear surfaces, including human skin, supporting various mechanical deformations. These advancements suggest significant potential for PeLEDs in future high-definition wearable displays.