40results about How to "High purity of luminous color" patented technology

The invention discloses outdoor multi-hybrid energy-saving luminous sand and a preparation method thereof. The outdoor multi-hybrid energy-saving luminous sand comprises a framework sand and an energy-saving layer, a light-emitting layer and a self-cleaning layer which are coated on the framework sand; the prepared multi-hybrid efficient energy-saving efficient luminous sand has efficient luminousperformance. is narrow in luminous spectrum band, high in color purity and bright in color, and the surface temperature of the multi-hybrid efficient energy-saving efficient luminous sand coating is20 DEG C lower than that of Portland cement concrete or above under the conditions that the solar irradiance is 1000 W / m<2>, the sky temperature is 300 K, the environment temperature is 310 K and theconvection coefficient is 12 W(m<2>K)<-1>. The luminous sand is simple in structure, easily available in raw materials, non-toxic and environment-friendly, has the characteristics of high-efficiency luminescence, hydrophobicity and high durability, also has energy-saving performance, is suitable for large-area application to the surfaces of roads and buildings, and realizes a high-efficiency luminescence function.

The invention discloses a blue, yellow and orange light calcium titanium mining quantum dot and a molecular sieve composite luminescent material and a preparing method and application thereof, and belongs to the field of luminescent materials. The method comprises the steps of 1, adding a molecular sieve into a cesium halide solution to stir to obtain a molecular sieve of Cs+ exchange; 2, adopting octadecene, oleic acid, oleylamine and lead halide as raw materials, heating and stirring the mixture at N2 atmosphere, and adjusting the molar ratio of different halogens in lead halide to obtain a lead halide solution; 3, mixing the molecular sieve of Cs+ exchange and octadecene, heating and stirring the mixture at N2 atmosphere, and injecting the mixture into the lead halide solution to react to obtain the composite luminescent material. The molecular sieve composite luminescent material is good in luminous efficiency and high in color purity and has narrow emission peaks at 465 nm (blue), 570 nm (yellow) and 590 nm (orange), the emission peaks is adjustable in the range according to halogen elements, meanwhile the fluorescent lifetime is obviously prolonged, and the composite luminescent material is stable in a solid state and can be applied to the fields of white light LED and the like.

The invention belongs to the field of OLED technology and provides a boron heterocyclic compound, which has the structure shown in chemical formula I, wherein X 1 and x 2 each independently selected from a single bond, ‑(R 1 )C(R 2 ) 2 ,-NR 2 、BR 3 , O atom, S atom; R 1 , R 2 and R 3 Mainly each independently selected from any one of aryl, heteroaryl, fused aryl, fused heteroaryl; D 1 and D 2 Each independently selected from hydrogen atom C12-C40 carbazolyl and its derivatives, C12-C40 diphenylamino and its derivatives, C13-C40 acridinyl and its derivatives; D 1 and D 2 respectively connected to the benzene ring of the structure shown in chemical formula I, and D 1 and D 2 are not hydrogen atoms at the same time. The boron heterocycle compound provided by the invention contains a donor-acceptor structure, has suitable HOMO and LUMO values ​​and a small ΔEst, and can bring about high brightness, low voltage, high efficiency and longer service life. The invention also provides a display panel and a display device.

The invention discloses an erbium-ytterbium co-doped tungstate upconversion luminescent material, a preparation method and an application of the material, and belongs to the technical field of fluorescent materials. The general formula of the upconversion luminescent material is as follows: Ca0.5La3-3(xy)(WO4)5:3xEr<3+>,3yYb<3+>, wherein x is Er<3+> doped mole percentage; y is Yb<3+> doped mole percentage; x+y is greater than or equal to 0.001 and less than 1.0; Yb<3+> serves as a sensitizer; Er<3+> serves as an active ion; and the upconversion luminescent material is excited by 975 nano infrared laser, has a luminescent peak at 480-570 nanometers, and can serve as a blue light luminescent material. The erbium-ytterbium co-doped tungstate upconversion luminescent material is stable in luminescence, and can be applied to the fields of infrared detection, solar cells, stereoscopic display and the like, and the luminescent intensity of the material is increased with the increasing of the energy intensity of an excitation diode.

The invention is applicable to the technical field of optical materials, and provides a perovskite nanowire and its preparation method and application. The preparation method of the perovskite nanowire includes the following steps: heating octadecene, oleic acid and a cesium source Dissolve to obtain a precursor solution; mix lead chloride, oleic acid, rare earth acetate, octadecene, octanoic acid, octylamine and oleylamine to obtain a transparent solution; inject the precursor solution into the transparent solution and cool at low temperature , and dispersed in a non-polar solvent to obtain the perovskite nanowires. The preparation method provided by the embodiment of the present invention is simple to operate, less time-consuming, and low energy consumption, and the blue-violet light CsPbCl prepared by it is 3 The sample of perovskite nanowire has stable phase, uniform shape and size, narrow half-peak width, high luminous color purity, less surface defects, and high quantum efficiency.