31results about How to "Improve light color purity" patented technology

The embodiment of the invention discloses an OLED device and a display device. The OLED device comprises a substrate, an anode, a hole injection layer, a hole transport layer, a light emitting layer,an electron transport layer, an electron injection layer and a cathode, wherein the light emitting layer comprises a light emitting main body material and a quantum dot material; the light emitting main body material comprises a phosphorescent material emitting green light and emitting red light, and a fluorescent material emitting blue light. Through doping the quantum dot material to the organiclight emitting main body material as a light emitting layer to build the OLED device, the problems that red and green phosphorescent organic materials in OLED devices have too high price and the efficiency of the blue fluorescent material is insufficient is solved, and the light emitting efficiency of the OLED device is finally improved.

The invention discloses a rare-earth nanometer metasilicate red fluorophor and the method for preparation. It contains the following setups: dissolving sensitizer activator substrate yttrium oxide in norbiline (or azotic acid), pressure-reduced distilling to eliminate water and excess acid, adding alcohol to prepare clear and transparent solution, and adding substrate silicon material to prepare transparent sol, pressure-reduced distilling to eliminate alcohol and acquiring powder solid, and adglutinating in 550-750 Deg. C by 2-4 hours to prepare the product. It prepares rare-earth nanometer red fluorescent powder in a low temperature (600 Deg. C) and a short time (3 hours), the average grain diameter being about 60-80 nm, the luminous intensity strong, chemical and optical property stable, the material easily obtained and cheap. Chemical expression formula of the rare-earth nanometer red fluorescent powder is as following: (YxSiy0z: Euj, Mn.

The complex phosphorescent material based on the electron-deficient functional group, the general formula of the molecular skeleton is: R is an electron-deficient substituent; it represents an organic nitrogen heterocyclic ring; the present invention regulates the position of the excited state at a high energy level by introducing an electron-deficient functional group, and promotes its integration with The coupling effect between the lowest excited states enhances the luminous ability; the luminous efficiency of the obtained luminescent material in the host reaches up to 96%, and has potential application value in the fields of high-performance electroluminescence, photocatalysis, cell imaging, and chemical and biological detection.

The present invention provides an OLED display panel. The OLED display panel includes a base, a light-emitting layer, and an encapsulation layer. The light-emitting layer is arranged on the base, the encapsulation layer covers the surface of the light-emitting layer, and the light-emitting layer The layer includes a plurality of pixel units arranged in an array, and the OLED display panel further includes at least one light extraction unit, which is arranged in the encapsulation layer and corresponds to the pixel units. The OLED display panel proposed by the present invention includes at least one light extraction unit, the light extraction unit is arranged in the encapsulation layer and corresponds to the pixel unit, the light extraction efficiency can be improved by adding the light extraction unit, thereby improving the light color purity , Display brightness and luminous life.

The invention provides a display, comprising a red light emitting unit, a green light emitting unit, and a blue light emitting unit, the red light emitting layer of the red light emitting unit is an organic metal halide perovskite material emitting red light, and the green light emitting unit The green light-emitting layer is an organic metal halide perovskite material that emits green light, and the blue light-emitting layer of the blue light-emitting unit is an organic blue light-emitting material other than the organic metal halide perovskite material, that is, the red light-emitting unit and the green light-emitting unit The light-emitting units all adopt the PeLED structure, and the blue-light emitting unit adopts the OLED structure. Except for the materials of the light-emitting layer, the materials of the red light-emitting unit, the green light-emitting unit, and the other structural layers of the blue light-emitting unit are the same, and can be produced in the same process. The preparation is completed, saving process time and production cost; because the price of the organic metal halide perovskite material of the red and green light-emitting layers is relatively low and the light color purity is high, the production cost of the display is further reduced and the color of the display is improved. saturation.