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A monolithically integrated micro-LED display based on GaN-on-Silicon substrate
摘要： A monolithic micro-light-emitting-diode (LED) display technology was proposed using a gallium-nitride-on-silicon substrate. An active matrix (AM) display was realized by interconnecting nitride-based LEDs as display pixels with silicon (Si) thin-film-transistors (TFTs) as driving circuitries. Metal-oxide semiconductor TFTs were fabricated on Si surface which had been exposed after the dry etching of LED epitaxial layer. The mobility and sub-threshold slope were measured as 354.3 cm2/Vs and 0.64 V/dec, respectively. A 150 pixel-per-inch 0.6-inch monolithic display was demonstrated with a 60 x 60 pixel-array AM display by an integration technology on the same substrate.
关键词： micro-LED,monolithic integration,active matrix display,GaN-on-Silicon
更新于2025-09-12 10:27:22
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Low Power Stretchable Active-Matrix Red, Green, Blue (RGB) Electrochromic Device Array of Poly(3-methylthiophene)/Prussian blue
摘要： We report the fabrication of a stretchable array of active-matrix (AM) electrochromic devices (ECDs). The ECD is made of poly(3-methylthiophene) and Prussian blue electrodes with a mixed gel electrolyte of acetonitrile, poly(methyl methacrylate), propylene carbonate, and lithium perchlorate. The ECD displays can express red, green, or blue (RGB) depending on the applied voltage and has a high stability in air. It exhibits low power consumption levels of 331 and 378 μW cm-2 (10 s duration) at -1.0 and 1.0 V, respectively, and a high coloration efficiency of 201.6 cm2 C-1 at 1.0 V. A 4 × 4 AM ECD array is integrated on a deformable Ecoflex substrate via a dry transfer method using patterned liquid metal-interconnections. The display shows a mechanical stability under bending and biaxial stretching by 30%. Finite element method analysis of the strain distribution also confirms that strain is not applied to the ECDs, guaranteeing stable operation of the array under deformation. Furthermore, a stretchable 6 × 6 AM ECD array for higher resolution display also exhibits mechanical stability under 30% biaxial stretching. This work demonstrates the high potential of our stretchable ECD array in low power-consuming displays for stretchable electronics, wearable devices, and electronic skin.
关键词： electrochromic device,active-matrix display,stretchable electronics,poly(3-methylthiophene),prussian blue
更新于2025-09-04 15:30:14