Transparent Displays Utilizing Nanopatterned Quantum Dot Films

Abstract

We report the realization of a transparent display using glass covered by a nanopatterned quantum dot (QD) film with good transmittance. The film was fabricated by nanoimprint lithography (NIL) and spin coating of colloidal QDs with specificexcitation maxima. The produced nanopatterned QD film was attached to transparent glass, enabling active image generation using a laser light source of a specific wavelength. Selective light emission was induced by strongly exciting the laser-exposed film surface, creating desired images, with color modulationenabled by controlling the QD layer (dozens of nanometers in size) via nanopatterning. The nanopatterned QD film used for image generation exhibits excellent transmittance (>80%), and can be used for transparent displays, with image realization in both bright and dark spaces. The fabricated displays have wide viewing anglesowing to their good light emission characteristics, and the fabrication through spin coating renders the fabrication process simple and applicable to large areas.

Custom-Made Chemically Modified Graphene Oxide to Improve the Anti-Scratch Resistance of Urethane-Acrylate Transparent Coatings

“…Transmittance assays were made to estimate transparency of the final coatings. Results are shown in Figure 4, where it is possible to observe that all coatings exhibited high transparency (conventional displays have 40% of transmittance and are considered transparent [44]) but, as expected, coatings containing graphene nanofillers presented lower transmittance than the pristine coating. The coating without nanofiller presented a transmittance above 85%, which is close to the transmittance of the glass substrate used (90%) in the visible region of the spectrum.…”

Sharp scattering spectra induced brilliant and directional structural colors

“…Based on the above discussion, the full-spectrum rainbow colors originating from Mie scattering can be easily realized using SiO 2 spheres with single particle size by the convenient spraying method, which greatly simplifies the structural preparation and patterning process for practical applications. In recent years, flexible and transparent displays have received great attention [38,39] due to the rapid development of various smart devices. Our findings based on scattering theory contribute to this field.…”

Space-Selective Fabrication of Light-Emitting Carbon Dots in Polymer Films Using Electron-Beam-Induced Chemical Reactions

“…Nanomaterials, such as quantum dots, 1,2 metal nanorods, 3,4 and nanocarbons 5,6 have attracted much attention because of their unique electrical, mechanical, and optical properties. Carbon nanomaterials have been extensively studied for their potential uses in structural elements, 7 conductive materials, 8 and light-emitting devices.…”