Electroluminescence device, planar light source and display using the same

一种电致发光装置、致发光的技术，应用在电致发光光源、电光源、光源等方向，能够解决没有提出、没有提出EL装置、没有发现高折射率材料等问题

Inactive Publication Date: 2005-07-13
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0022] However, the problem with high refractive index glass is that its cost is generally higher
[0033] In addition, as described above, no proposal has been made to waveguide light for an EL device; in particular, no EL device has been proposed where light is waveguided at an interface between a transparent electrode and a glass substrate, and this light is efficiently extracted. and showed improved luminous efficiency
Also, a large number of high refractive index materials, especially resin materials with excellent processability, have not been found that can be used in this application

Method used

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  • Electroluminescence device, planar light source and display using the same
  • Electroluminescence device, planar light source and display using the same
  • Electroluminescence device, planar light source and display using the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-1

[0228] 29.89 g (171.6 mM) of toluene diisocyanate (one isomer mixture: T-80, product of Mitsui Takeda Chemical Co.), 94.48 g (377.52 mM) of 4,4'-diphenylmethane diisocyanate, 64.92 g ( 308.88 mM) naphthyl diisocyanate and 184.59 g toluene were mixed in a 500 ml four-necked flask equipped with a stirrer, dropping funnel, reflux condenser and thermometer. Under stirring conditions, 8.71g (51.48mM) 1-naphthyl isocyanate and 0.82g (429mM) 3-methyl-1-phenyl-2-phospholene-2-oxide were added to the mixture, and the whole was heated to 100°C and maintained for two hours. The progress of the reaction was monitored by infrared spectroscopy. More specifically, the N-C-O stretching vibration (2,270 cm -1 ) absorption, and the N-C-N stretching vibration of carbodiimide (2,135cm -1 ) increased absorption. The reaction end point was determined by IR, and the reaction solution was cooled to room temperature to obtain a polycarbodiimide resin solution.

Embodiment 1-2

[0230] Put 89.01g (355.68mM) 4,4'-diphenylmethane diisocyanate, 24.92g (118.56mM) naphthyl diisocyanate, 44.87g (266.76mM) hexamethylene diisocyanate and 216.56g toluene in a Mix in a 500ml four-necked flask with a stirrer, dropping funnel, reflux condenser and thermometer. Add 7.52g (44.46mM) 1-naphthylisocyanate and 0.71g (3.705mM) 3-methyl-1-phenyl-2-phospholene-2-oxide to the mixture, and stir the whole at 25°C for 3 hours , and then heated to 100°C with stirring for an additional two hours. The progress of the reaction was monitored by infrared spectroscopy. More specifically, the N-C-O stretching vibration (2,270 cm -1 ) absorption, and the N-C-N stretching vibration of carbodiimide (2,135cm -1 ) increased absorption. The reaction end point was determined by IR, and the reaction solution was cooled to room temperature to obtain a polycarbodiimide resin solution.

[0231] The polycarbodiimide resins obtained from the above Synthesis Examples 1-1 and 1-2 were tested f...

Embodiment 1-3

[0253] The polycarbodiimide resin solution in Synthesis Example 1-2 was used instead of the polycarbodiimide resin solution in Synthesis Example 1-1 to form a light-diffusing layer, and Example 1-1 was repeated for the rest. A dispersion obtained by dispersing fine titanium dioxide particles into the polycarbodiimide resin solution obtained in Synthesis Example 1-2 was applied to the light-diffusing layer to form a transparent layer having a thickness of 10 µm. Then repeat embodiment 1-1 to prepare such as figure 1 The organic EL device shown. The positive brightness measured by applying 15V voltage to the device is 633cd / m 2 .

[0254] The "dispersion liquid obtained by dispersing fine titanium dioxide particles" was prepared as follows. By 100 parts by weight to the ratio of 100 parts by weight of solid polycarbodiimide resin the fine TiO 2 Microparticles (products of CI Chemical, spherical particles with an average particle diameter of 30nm, dispersion in toluene solve...

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Abstract

The invention provides an organic electroluminescent device, comprising an organic layer, the organic layer includes an emission layer; a pair of electrodes sandwiching the above organic layer, consisting of a cathode and an anode, wherein at least one electrode is transparent a transparent layer disposed adjacent to the light extraction surface of the transparent electrode; a region, substantially interfering with the angle of reflection and refraction of light, disposed adjacent to or within the transparent layer, wherein the transparent layer's The refractive index is substantially equal to or greater than that of the emissive layer.

Description

technical field [0001] The present invention relates to an electroluminescent device (hereinafter referred to as "EL device") which has excellent luminous efficiency and is particularly good at extracting emitted light to the outside; A high-efficiency planar light source and a display using the planar light source. Background technique [0002] The EL device includes an emission layer sandwiched between a pair of electrodes consisting of an anode and a cathode, and light emitted from the device is obtained by electrical means. EL devices are actively researched not only for application to display devices but also for application to various light sources such as planar illumination light sources, light sources for optical fibers, backlights for liquid crystal displays, or backlights for liquid crystal projectors. [0003] In particular, since organic EL devices (organic light emitting diodes) have advantages of high luminous efficiency, drivability at low voltage, light wei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/14H01L51/00H01L51/30H01L51/52H05B33/20H05B33/22
CPCG02B5/0242G02B5/0278Y10S428/917Y10T428/25Y10T428/24942H10K85/649H10K85/615H10K85/631H10K85/311H10K85/324H10K2102/331H10K59/877H10K59/879H05B33/14H05B33/22H05B33/20H10K50/858H10K50/854
Inventor 十二纪行中村年孝堀田祐治
Owner NITTO DENKO CORP
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