Graphene superpixel display, preparation method thereof and graphene superpixel color display system
A graphene and super-pixel technology, applied in instruments, optics, nonlinear optics, etc., can solve the problems that thin films cannot achieve diffraction-limited resolution, and nano-color display technology is difficult to process in large areas.
Inactive Publication Date: 2021-08-17
DONGGUAN UNIV OF TECH
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Problems solved by technology
[0003] The purpose of the present invention is to provide a graphene super-pixel display, its preparation method and graphene super-pixel color display system, to solve the problem that the existing nano-color display technology that can realize the diffraction limit is difficult to process in a large area, and the film display cannot realize diffraction The problem with extreme resolution
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[0040] The present invention proposes and demonstrates a graphene superpixel-based color display realized by alternating graphene / graphene oxide and dielectric layers on a silver-coated flexible substrate. Graphene superpixels are fabricated by laser nanoprinting, which utilizes the photoreduction effect of laser light on graphene oxide layers to achieve locally tunable composite refractive index and thickness upon laser irradiation. By precisely controlling the initial thickness of the graphene superpixel to nanometer precision, and controlling the laser pulse energy density (depending on the pulse width, the pulse width is preferably 100fs ~ 200fs) and the exposure dose (0.3nJ-1.1nJ), it can be achieved Different complex refractive indices and thicknesses for different absorption wavelengths are supported to obtain the desired high-resolution color display. Using this approach, the present invention can print all primary colors at diffraction-limited pixel resolution on larg...
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Abstract
The invention provides a graphene super-pixel display. The absorption spectrum of the pixel is regulated and controlled by accurately controlling the thickness and the complex refractive index of the graphene super-pixel, so that color display is realized. The invention also provides a preparation method of the graphene superpixel display. The designed graphene superpixel is processed through a three-dimensional laser nano printing technology. The design and processing method can be applied to graphene superpixels of any color. Meanwhile, the large-area processing of a graphene super-pixel color display screen with the diffraction limit resolution is realized. Also the invention further provides a graphene superpixel color display system that can dynamically and instantly switch the displayed color without additional resources or equipment by simply scattering a light source using frosted glass, so the system is particularly useful in security and anti-counterfeiting applications. The technology is expected to be widely applied to security labels, ultrathin photoelectric detectors, solar cells, optical filters, visual art and space decoration.
Description
technical field [0001] The invention belongs to the technical field of ultra-thin color display, and in particular relates to a graphene super-pixel display, a preparation method thereof and a graphene super-pixel color display system. Background technique [0002] Color is important for perceiving and identifying both natural and man-made objects. High-resolution shading near the diffraction limit (≈250 nm, half of the center of the 500 nm visible spectrum) is highly desirable for a wide range of applications, but remains challenging to achieve using conventional shading methods based on light scattering or absorption. Alternatively, colors can be produced through diffraction or resonance of periodically arranged nanostructures such as photonic crystals, plasmonic arrays and metasurfaces. These nanostructures can be tailored to produce vibrant colors with desired features, such as narrow bandwidth, high resolution and iridescence. In particular, diffraction-limited resolu...
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IPC IPC(8): G09F9/30G02F1/01G02B26/00
CPCG02B26/001G02B26/007G02F1/0102G02F1/0121G09F9/30G09F9/301
Inventor 贾宝华林瀚
Owner DONGGUAN UNIV OF TECH