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White OLED luminophor

An illuminant, white technology, applied in the manufacture of electric solid devices, semiconductor devices, semiconductor/solid state devices, etc., can solve the problems of difficult process, difficult to manufacture white OLED light emitting devices, poor white spectral stability of OLED light emitting devices, etc. Ensure spectral stability, improve mass production yield, and ensure the effect of color stability

Inactive Publication Date: 2013-01-09
李崇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. It is difficult to manufacture multi-band white light-emitting devices with more than three peaks, so it is difficult to manufacture white OLED light-emitting devices with high color rendering index spectrum
[0008] 2. The white spectrum stability of OLED light-emitting devices is poor, and light-emitting devices are prone to spectral waveform drift under different electric field intensities and driving times
[0009] 3. In order to fully and effectively utilize the energy of high-energy blue fluorescence and low-energy green or red phosphorescence, the structure of the light-emitting layer of OLED light-emitting devices is complex, and the process is difficult, and the structure of phosphorescence-fluorescence mixed light-emitting layers is very important for the realization of white light devices. There are certain difficulties in high efficiency, and the external quantum efficiency of light-emitting devices is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] figure 1 Shown is the first structure of the white OLED luminous body of the present invention, which includes an OLED light-emitting device and a transparent substrate 1, and the OLED light-emitting device includes a transparent conductive electrode layer 2, an organic light-emitting functional material film layer combination 4 and a reflective electrode Layer 5, the OLED light-emitting device can generate electroluminescence when it is powered on, and the electroluminescent light-emitting spectrum at least includes blue light-emitting components with a CIE color coordinate Y value of less than 0.55; the transparent OLED light-emitting device The conductive electrode layer 2 is arranged on the transparent substrate 1, the color changing material 3 is arranged between the reflective electrode layer 5 of the OLED light-emitting device and the transparent substrate 1, and the color changing material 3 directly covers the surface of the transparent plate 1 and the reflecti...

Embodiment 2

[0164] figure 2 Shown is the second structure of the white OLED luminous body of the present invention, which is the same as figure 1 The structural form shown is different in that the color changing material 3 of the white OLED luminous body is arranged between the transparent conductive film layer and the reflective electrode layer 5, and the color changing material 3 does not contact the glass substrate. The color-changing material 3 in this structural form can also strongly absorb the electroluminescence that is bound in the OLED light-emitting device and propagates laterally in the form of guided waves and cannot be effectively extracted, and converts it into low-energy photoluminescence. The photoluminescence is reflected by the reflective electrode layer 5 and then directed toward the transparent substrate 1, and the photoluminescence emitted from the transparent substrate 1 is mixed with the electroluminescence emitted from the transparent substrate 1 to form the whit...

manufacture Embodiment 1

[0166] Manufacturing steps process:

[0167] (1) In the form of entrusted processing, the etched ITO transparent substrate 1 (film impedance is 9 ohm / □) ​​was obtained from Chunghwa Picture Tubes Co., Ltd. (headquartered in Taiwan), and the ITO on the ITO transparent substrate 1 was divided into widths It is a 1.5 cm strip grid line, and the spacing between each grid line is 1 mm.

[0168] (2) Set the color changing material 3 on the above-mentioned ITO transparent substrate 1: In this manufacturing example, the color changing material 3 is processed by a wet process method, the color changing material 3 is a green color changing material, and the green color The change material is arranged on the ITO transparent substrate 1 in the form of photoresist, specifically, the green color change material 3 is dispersed into the transparent photoresist and processed by traditional photolithography process. The photoresist material used in this manufacturing example is a transparent p...

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Abstract

The invention relates to a white OLED (Organic Light Emitting Diode) luminophor which is characterized in that the electroluminescence spectrum of the OLED luminophor at least comprises blue luminescent component with the Y value of the CIE (Commission International Eclairage) chromaticity coordinate smaller than 0.55. The white OLED luminophor further comprises a transparent base plate on which transparent conducting electrode layers of the OLED luminophor are distributed; color transformation material capable of transforming the electroluminescence of the OLED luminophor to photoluminescence is arranged between a reflecting electrode layer and the transparent base plate of the OLED luminophor; after being reflected by the reflecting electrode layer, the photoluminescence emits towards the transparent base plate at a right angle; and the photoluminescence emitted from the transparent base plate is mixed with the electroluminescence emitted from the transparent base plate to form white luminescence. The white OLED luminophor is high in yield and low in production cost, and can be applied in white OLED lighting field or be used as a liquid crystal backlight source.

Description

technical field [0001] The invention relates to the technical field of luminous body production and manufacturing, specifically a high-efficiency, high-color rendering index high-performance white OLED luminous body manufactured in combination with built-in color conversion technology. From the perspective of practicality and industrialization, the white OLED The luminous body can be used in the field of white OLED lighting or as a liquid crystal backlight product. Background technique [0002] OLED (Organic Electroluminescence), as a new type of semiconductor light source technology, is expected to become the next generation of green light source after fluorescent lamps. It has the characteristics of energy saving, environmental protection, long life, small size, etc., and can be widely used in various indications, displays, decorations , backlight, general lighting and urban night scenes and other fields. Therefore, it has received extensive research and attention in rece...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54
Inventor 李崇
Owner 李崇
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