Laminate for light emitting device and process of preparing same

A light-emitting device and light extraction layer technology, applied in the field of optical devices, can solve the problems of increased light loss and reduced visible light transmittance, and achieve the effect of uniform turbidity ratio

Inactive Publication Date: 2016-02-24
SAINT-GOBAIN GLASS FRANCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, as in the patent literature, when the scattering particles are randomly distributed in the inner light extraction layer, multiple scattering of incident light leads to an increase in light loss, causing a decrease in the transmittance of visible light

Method used

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  • Laminate for light emitting device and process of preparing same
  • Laminate for light emitting device and process of preparing same
  • Laminate for light emitting device and process of preparing same

Examples

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preparation example Construction

[0082] figure 2 It is a flow chart illustrating a method for preparing a laminate for a light emitting device according to an embodiment of the present invention. The meaning of "ILE", "V" and "G" and figure 1 The same as those disclosed in . "F" indicates glass powder before sintering, and "EC" indicates ethyl cellulose.

[0083] First, a substrate containing potassium or having been surface-treated with potassium, or coated with a layer of a potassium-containing mineral is prepared (step (a)). The basic physical properties necessary for the substrate, such as the refractive index, are as described above. A paste comprising glass frit, preferably without scattering particles, is applied on the substrate (step (b)), and then dried (step (c)). The composition of the glass frit included in the paste is as described above, and the paste includes the glass frit in an amount of 70 to 80% by weight and the remaining composition of the paste includes a binder, a solvent, and the...

example 1

[0095] Prepared as described in Example 10 of U.S. Patent No. 6,905,991 having a thickness of 0.7 mm and comprising 5 wt% Na 2 O and 6wt%K 2 O glass substrate. Prepare a slurry, the slurry includes 75wt% glass powder based on the total amount of the slurry, 3wt% ethyl cellulose as a binder and 22wt% solvent, the glass powder includes 70wt% based on the total weight of the glass powder %Bi 2 o 3 , 3wt%Al 2 o 3 , 10wt%ZnO, 7wt%SiO 2 , 9wt%B 2 o 3 and 1wt%Na 2 O. The refractive index at 550nm is 1.91.

[0096] The glass substrate was cleaned, and then a paste including glass frit was applied on the glass substrate by a screen printing method. The solvent was evaporated by drying the coated slurry in an oven at a temperature of 130°C for about 20 minutes. Thereafter, ethyl cellulose contained in the dried slurry was removed by leaving the dried slurry at a temperature of 430° C. for about 20 minutes.

[0097] The prepared glass frit layer was sintered at a temperature...

example 2

[0101] A laminate for a light emitting device including an interfacial void layer was prepared in the same manner as in Example 1, except that the sintering temperature was set to 550°C.

[0102] Example 3: Preparation of laminates for light-emitting devices with potassium-containing glass substrates

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Abstract

Provided is a laminate for a light emitting device. The laminate for a light emitting device includes a glass substrate having potassium or a glass substrate coated with a mineral layer containing potassium, and an internal light extraction layer formed from a glass frit on the glass substrate. The internal light extraction layer includes an interface void layer at an interface with the glass substrate or the mineral layer. The laminate of the present invention is characterized in having an interface void layer inducing the scattering of light for effectively extracting light, which is lost at the interface between the substrate and the internal light extraction layer, to the outside. The laminate of the present invention is suitable for the fields of optical devices such as organic light emitting diodes (OLEDs), backlights, lighting industry, etc.

Description

technical field [0001] The present invention relates to a laminate for a light-emitting device and a method for producing the same, wherein the laminate includes an interfacial interstitial layer that induces light scattering for passing between a glass substrate and an inner light extraction layer Light loss at the interface is minimized while enhancing external light efficiency. The laminate for light-emitting devices of the present invention is particularly suitable for the field of optical devices, such as organic light-emitting diodes (OLEDs), backlights, lighting industry, and the like. Background technique [0002] Optical devices such as OLEDs can be classified depending on the emission structure into a bottom emission structure, in which light is emitted toward a glass substrate, and a top emission structure, in which light is emitted in a direction opposite to the glass substrate. In the bottom emission structure, the cathode serves as a reflector by using an alum...

Claims

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Application Information

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IPC IPC(8): H01L51/52H05B33/22H01L51/56
CPCH05B33/22C03C3/066C03C8/04C03C8/16C03C17/008Y02E10/549Y02P70/50H10K50/854H10K50/858H10K77/10H10K50/85H10K71/00H10K2102/351H10K50/80
Inventor 韩镇宇李荣盛
Owner SAINT-GOBAIN GLASS FRANCE
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