101 results about "Dye doped" patented technology

Nonlinear optical filters and associated methods. In a representative embodiment, a nonlinear optical filter includes a grating and a dye-doped polymer layer coupled to the grating. The dye-doped polymer layer may include ionic self-assembled layers. An associated method includes: providing a nonlinear filter comprising a grating and a dye-doped polymer layer coupled to the grating, directing an input broadband optical wave upon the filter, and backward diffracting the broadband optical wave from the grating as an output narrowband optical wave. The output narrowband optical wave may include a second harmonic beam.

The invention discloses a phosphorescent organic electroluminescent device, and the device comprises a hole transmission layer, a light emitting layer and an electron transmission layer, wherein the hole transmission layer, the light emitting layer and the electron transmission layer are stacked sequentially. The light-emitting layer is of a double-layer structure which consists of a hole transmission material layer and an electron transmission material layer. The hole transmission material layer is disposed between the hole transmission layer and the electron transmission material layer, and the electron transmission material layer is disposed between the hole transmission material layer and the electron transmission layer. A contact interface of the hole transmission material layer and the electron transmission material layer forms a laser-based composite. The hole transmission material layer comprises a main material, and the main material is a material with the capability of hole transmission. The electron transmission material layer comprises a main material and phosphorescent dye doped in the main material, wherein the main material is a material with the capability of electron transmission. The phosphorescent doped density is reduced through the laser-based composite, and the long service life and high efficiency can be maintained.

Disclosed is an SiO2 nano-particle taking a positive electrical polyelectrolyte as a template and doped with a negative electricity dye, comprising a nuclear shell structure, a kernel comprises a polyelectrolyte cluster with positive electricity, and is doped with the fluorescent dye with negative electricity and SiO2, as well as a selectable additive with negative electricity, and a shell is composed of the SiO2, wherein, the sum of negative charges of the additive and the fluorescent dye is less than the number of positive charges of the polyelectrolyte cluster. A preparation method of the SiO2 nano-particle comprises steps of: composite solution preparation of the polyelectrolyte and the fluorescent dye; formation of the SiO2 nano-particle by hydrolysis and condensation of an organic silicon source; and organic silicon source coating. The invention can be widely applied to the doping of various fluorescent dyes with negative electricity groups in silicon dioxide, and can realize simultaneous doping of a plurality of dyes and control of dye doping amount and particle sizes and appearances of products, the prepared SiO2 nano-particle is spherical, the particle sizes are uniform, the surface functionalization is easy, and the formed colloid has good stability, so as to provide more options for biomedicine, theoretical research and the like.

The invention relates to a preparation method of a phosphorescent diode with an electronic transmission layer doped with lithium fluoride. The phosphorescence diode has a eight-layer planar structure that comprises an anode layer, a hole transmission layer, a luminescent layer I, a luminescent layer II, a hole barrier layer, an electronic transmission layer, an electron injection layer and a cathode layer; thris (2-phenylpyridine) iridium is utilized to carry out phosphorescent dye doping on the luminescent layer I and the luminescent layer I so as to form a double luminescent layer; and lithium fluoride is utilized to carry out doping on the electronic transmission layer. The preparation of the phosphorescent diode is carried out in a vacuum vapor plating furnace, wherein the vacuum degree is less than or equal to 0.0004Pa and the temperature in the furnace is from a value by adding 25 DEG C with 2 DEG C to a value by subtracting the 2 DEG C from the 25 DEG C. Processes of heating and sublimation of vapor plating materials, form transformation, vapor deposition and film growth are carried out so as to form a dual-luminescent layer phosphorescent diode with the electronic transmission layer doped with the lithium fluoride, wherein the phosphorescent diode has a thickness of 261.2 nm. Besides, an emission wavelength is 516 nm; a color coordinate is expressed as that x is equal to 0.3151 and y is equal to 0.6054; green lights is emitted; and a maximum value of current efficiency is 39. 03cd / A. Moreover, compared with the prior art, the technology employed in the invention enables luminous efficiency of the diode to be improved by 54%; an initial brightness of a packaging device is 500cd / m <2>; and the device service life is 320h; and the service life of the diode can be improved by 3.57 times.

Under one aspect, a phase contrast imaging system includes a coherent light source emitting a coherent beam directed toward a sample area; a lens arranged to collect at least part of the beam from the sample area; an element Fourier transforming the collected beam in a Fourier plane; a liquid crystal cell in the Fourier plane that transmits at least part of the transformed beam, wherein the cell includes liquid crystal molecules having a phase transition temperature, and wherein at temperatures exceeding the phase transition temperature, light transmitted through the liquid crystal molecules obtains a different phase than light transmitted through the liquid crystal molecules obtains at temperatures below the phase transition temperature; and an element inversely Fourier transforming the transmitted beam to provide an image. Part of the transformed beam has an intensity sufficient to heat a portion of the liquid crystal molecules above the phase transition temperature.

A surface display unit incorporates an opaque screen (180) and an image panel (110). The opaque screen is disposed on the front side of the image panel which provides an optical image. The opaque screen generally hides the image panel while the surface display unit is not in use. When the image panel is activated to provide an optical image, the opaque screen provides a suitable level of transparency so that a viewer can observe the optical image with sufficient clarity. The opaque screen can provide optical enhancement, decorative texture, and / or mechanical support and include antiglare, anti-reflective, and anti-scratch films (140, 150, 160). The opque screen can be a laminated polymer film, an electrochromic or photochromic system, or a switchable dye doped liquid crystal material.

The present invention provides a color liquid crystal display panel, which includes: a plurality of layers of liquid crystal cells (2) that are arranged parallel to each other and bonding members (8) bonding the plurality of layers of liquid crystal cells (2). Each of the liquid crystal cells (2) includes a thin-film transistor substrate (20), a package substrate (30), and a dye-doped liquid crystal layer (40) sealed between the thin-film transistor substrate (20) and the package substrate (30). The dye-liquid crystal layer (40) includes a liquid crystal material, a dichroic dye, and a chiral reagent. The dichroic dye of each of the liquid crystal cells (2) absorbs light of a predetermined range of wavelength. The plurality of layers of liquid crystal cell (2) respectively absorbs lights of different ranges of wavelength. The color liquid crystal display panel requires no conventionally used polarizer and color filter, so that the manufacture cost of and the requirement for backlighting brightness by the liquid crystal display panel can both be reduced.

The invention provides a liquid-crystal tunable laser with echo wall mode and distribution feedback emission and a preparing method thereof, and belongs to the technical field of tunable lasers. The liquid-crystal tunable laser with echo wall mode and distribution feedback emission comprises a capillary tube glass matrix, light-control alignment films, cholesteric liquid crystals and laser materials. The light-control alignment films are arranged on the inner side of the capillary tube glass matrix and are arranged in an axial-symmetry mode, and the cholesteric liquid crystals and the laser materials are arranged in defined space. According to the liquid-crystal tunable laser, laser emission of dye-doped cholesteric liquid crystals is achieved in the capillary tube glass matrix, and emission considers distribution feedback laser emission and echo wall mode laser emission at the same time; structural parameters such as the inner diameter of a capillary tube, the thickness of the light-control alignment films and the dye-doped cholesteric liquid crystals are optimized, the emission efficiency of the cholesteric liquid crystal laser can be improved, and the liquid-crystal tunable laser has the quite-good temperature-tunable characteristics.

A field emission device having improved properties and which finds use in display devices, such as a flat panel displays. Known devices and displays suffer from problems such as complexity of fabrication and limited color gamut. The present device provides a field emission backplate which is made from a substantially semiconductor based material and has a plurality of grown tips. The device also includes at least one electro-luminescent or photo-luminescent material having a fluorescent material such as a fluorescent dye doped material chemically attached thereto.