285results about How to "High optical transmittance" patented technology

The invention provides a preparation method of a PET-graphene-AgNW (polyethylene terephthalate-graphene-Ag nanowire) composite transparent conducting film. The preparation method comprises steps as follows: cutting and cleaning of a graphene substrate, preparation of an AgNW solution, vacuum filtration of an AgNW film, preforming, removing of a filter film and nitrogen blow-drying. The invention further provides the PET-graphene-AgNW composite transparent conducting film prepared with the method. According to the preparation method, the AgNWs and graphene are subjected to film forming independently and then are composited together, wherein AgNW film forming adopts vacuum filtration, and graphene adopts CVD (chemical vapor deposition) growth, so that the prepared composite film has the advantages of uniformly dispersed AgNWs, controllable thickness, good mechanical flexibility, low square resistance, high optical transmittance and lower surface roughness and can meet the requirement of device applications; according to the composite transparent film, the lower square resistance and the higher optical transmittance can be realized only through composition of a few AgNWs, and the square resistance of the PET-graphene-AgNW composite transparent conducting film is lower than that of a pure silver AgNW film under the same concentration by 20%-40%.

The invention relates to a semi-transparent and semi-reflective blue phase liquid crystal display device comprising a first substrate, a second substrate, a liquid crystal layer which is clamped between the first substrate and the second substrate, a plurality of bulges and a plurality of electrodes. An area between the first and second substrates is divided into a plurality of transmission areas and a plurality of reflection areas, and the transmission areas and the reflection areas are lined in a staggered way. The liquid crystal layer adopts the same blue phase liquid crystal material in the transmission areas and the reflection areas. The bulges which are arranged on the first substrate are protruded from the first substrate to the second substrate, and each bulge is arranged at a position of the reflection area which corresponds to the bulge. The electrodes are made of reflective materials, and each electrode is covered on a corresponding bulge. When the semi-transparent and semi-reflective blue phase liquid crystal display device is electrified, the optical path difference in the reflection areas is matched with that of the transmission areas; and meanwhile, compared with an existing semi-transparent and semi-reflective liquid crystal display device, the semi-transparent and semi-reflective blue phase liquid crystal display device has higher penetration rate and lower driving voltage.

The invention relates to an LED-chip shining-light-bar base plate material and an LED bulb lamp. The LED-chip shining-light-bar base plate material and the LED bulb lamp are characterized in that the LED bulb lamp is composed of shining strips (1), a driving power source (2), a glass bulb shell (3), a glass support core column (4) and an electric connector (5); the glass bulb shell (3) and the glass support core column (4) are subjected to vacuum sealing to a cavity to be filled with high thermal conduction gas, the glass support core column (4) and the shining strips (1) fixed on the glass support core column (4) are contained in the sealed cavity; the shining strips (1) are sequentially electrically connected with the driving power source (2) and the electric connector (5); the LED-chip shining strips (1) are composed of YAG, wherein Ce raw material powder and nitride red fluorescence powder are fired to achieve the effect that one face of the base plate material (6) comprises LED blue light chips (9), and the surfaces of the blue light chips (9) are coated with a fluorescent powder layer (7). According to the LED-chip shining-light-bar base plate material and the LED bulb lamp, low-cost preparing of the high-quality transparent fluorescence polycrystal base plate material is achieved with the novel environment-friendly aqueous tape-casting technology. The fluorescence polycrystal base plate material which is high in lighting efficiency, color rendering index and optical transmittance and the bulb lamp which is good in color-temperature consistency heat dissipation, high in reliability and long in service life are obtained.

The invention relates to a two-component three-field infrared optical system and a field conversion method thereof. The system comprises a detector, convergent lens sets, reflex reflective mirror sets, a fixed lens set, a compensation lens set, a zoom lens set, and a front-set infrared objective lens. The zoom lens set or the compensation lens set axially moves to realize conversion of narrow, middle and wide fields. Three fields of the zoom lens set and the compensation lens set can be achieved by use of the zoom principle of an optical compensation method, and the complex degree of a mechanism adopting a three-component or four-component system to achieve three fields is greatly simplified. High optical axis precision and high optical transmittance of the optical system are ensured, the complex degree of the mechanism is greatly simplified, and the infrared three fields are enabled to have high imaging quality and effect simultaneously. Mutual conversion of wide, middle and narrow optical fields can be realized by moving only one set of lenses. The in-place precision of the lens sets is high, and the in-place time is short. The optical axes of different fields are highly consistent. The control is simple, the reliability is high, and the motion mechanism is simple.

The invention relates to the field of nano-optoelectronic material preparation, in particular to a silver nanowire coating solution and a transparent conductive film. Directed at the problems of highsurface resistance, high roughness, poor transmittance, poor haze and the like in existing transparent conductive film, the invention provides a coating solution containing complexing dispersion resinand a melting soldering flux and a transparent conductive film prepared therefrom. The complexing dispersion resin can be complexed with nanowire surface metal ions to improve the distribution uniformity of nanowires in the film, thus improving the spreadability and smoothness of the nanowires and reducing the film surface roughness; the melting soldering flux can braze nodes of the nanowires toform an intercommunicated network structure in the film layer drying process so as to lower the sheet resistance of the film. Therefore, the transparent conductive film has high optical transmittance,low surface resistance, high conductive uniformity, low surface roughness and low haze.

The invention provides a process of preparing graphene. According to the technical scheme, a radio frequency-plasma enhanced chemical vapor deposition (RF-PECVD) method is employed, wherein a polycrystal cobalt thin film prepared from a magnetron sputtering sputter coating system is employed as a substrate. At a low substrate temperature (800 DEG C) and low gas total flow quantity (78 sccm) and for a short deposition time (40 s), graphene having 1-5 carbon atom layers and being high quality is prepared successfully. The RF-PECVD allows the graphene to be prepared at low reaction temperature, for short deposition time and with less carbon resource, thereby greatly reducing the production cost of graphene and laying a foundation of promoting industrial application of the graphene. The graphene has high specific surface area, high optical transparency, high electric conductivity and high flexibility, so that the graphene has wide application value in the fields of electronic devices and optical devices.

The invention discloses a photovoltaic transparent composite film, and a preparation method and application thereof. The transparent composite film comprises a release paper layer and a function layer, the function layer comprises a supporting layer and a bonding layer, and at least one of the supporting layer and the bonding layer is mixed with a light conversion agent which can converting part of ultraviolet light into visible light. The lower surface of the supporting layer is connected with the bonding layer, and the upper surface and the lower surface of the supporting layer are both flat surfaces or at least one surface is provided with certain light tripping microstructures. The bonding layer is formed by an acrylic ester pressure-sensitive adhesive and can bond metal materials well. The transparent composite film can be applied to multi-main grid and non-main grid photovoltaic modules, and plays a role in applying brass wires to a battery piece, and has high transmissivity and an excellent anti-ultraviolet ageing performance, and can satisfy the usage demand of photovoltaic modules.

The invention discloses an Er<3+> / Pr<3+> co-doped yttrium lithium fluoride monocrystal and a preparation method thereof. The yttrium lithium fluoride monocrystal is a rare earth ion Er<3+> / Pr<3+> co-doped monocrystal; and the molecular formula is LiY(1-x-y)ErxPryF4, wherein x is greater than or equal to 0.010 and less than or equal to 0.085, and y is greater than or equal to 0.0001 and less than or equal to 0.008. The yttrium lithium fluoride monocrystal has the advantages of high emission efficiency of fluorescence of 2.7 microns and high transmittance in intermediate infrared ray, has better thermal, mechanical and chemical stabilities than those of glass state materials and has the characteristics of low phonon energy, high optical transmittance of wavebands with width of 300-5500nm, less color center forming amount, low thermal lens effect and the like, thereby being more easily processed and more suitably used in laser devices. In the preparation method disclosed by the invention, a sealing crucible falling technology is used, so that the operation is simple; the raw material is fluorated at high temperature in a sealed water-free and oxygen-free environment, so that the crystal is isolated from air and water vapor during the growth; and therefore, the high-quality Er<3+> / Pr<3+> co-doped LiYF4 monocrystal containing little OH<-> ion and oxide is obtained.