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Image display device and organic electroluminescence element

An image display device and luminescent technology, applied in electroluminescent light sources, electrical components, electric light sources, etc., can solve the problems of low luminous efficiency, lack of practicability, and difficulty in making films, etc., and achieve the effect of excellent element characteristics

Inactive Publication Date: 2011-12-07
TOKYO KOGEI UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, these polyimides have a problem that it is difficult to form not only a film suitable for a specific field with a liquid crystal alignment film thickness of 1 μm or less, but also a film with a thickness of about 100 μm.
[0015] Furthermore, an organic electroluminescence element having a polyimide substrate and a polycrystalline ITO electrode has been reported, but regarding its element characteristics, the current density at a voltage of 14V is 100A / m 2 , and at a current density of 100A / m 2 The lower luminous efficiency is extremely low, 11m / W, which lacks practicality (Non-Patent Document 1)

Method used

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  • Image display device and organic electroluminescence element
  • Image display device and organic electroluminescence element
  • Image display device and organic electroluminescence element

Examples

Experimental program
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Embodiment

[0127] Hereinafter, the present invention will be described more specifically with reference to production examples, examples, and comparative examples, but the present invention is not limited to the following examples. Measuring devices for various physical properties in Examples are as follows.

[0128] [1] Molecular weight

[0129] Apparatus: GPC measurement apparatus at room temperature (SSC-7200, manufactured by Senshiyu Ikegaku Co., Ltd.)

[0130] Eluent: DMF

[0131] [2] TG / DTA (differential thermogravimetry simultaneous measurement device)

[0132] Device: Thermoplus TG8120 (Rigaku Denki Co., Ltd.)

[0133] [3]FT-IR

[0134] Device: NICOLET 5700 (Thermo ELECTRON CORPORATION)

[0135] [4] Film thickness

[0136] Measuring device: Micrometer (manufactured by Santop Co., Ltd.)

[0137] [5]UV-Vis spectrum

[0138] Device: UV-VIS-NIR SCANNING SPECTROPHOTOMETER (self-recording spectrophotometer) (manufactured by Shimadzu Corporation)

[0139] [6] X-ray diffraction ...

manufacture example 1

[0143] [Manufacturing example 1] Synthesis of TDA / 1,3-BAPB polyamic acid and polyimide, and production of polyimide film

[0144] [chemical 8]

[0145]

[0146] 1.95 g (7.0 mmol) of 1,3-BAPB and 16.0 g of DMAc were added to a 50 mL four-neck reaction flask equipped with a stirrer installed in a water bath at 25° C., and 1,3-BAPB was dissolved in DMAc. Next, stirring this solution, it added slowly, dissolving 2.10 g (7.0 mmol) of TDA. Furthermore, it stirred at 26 degreeC for 24 hours, and superposition reaction was performed, and the polyamic-acid solution of 20 mass % of solid content was obtained.

[0147] After casting the solution on a glass plate of 75mm×100mm, put it in a decompression dryer (pressure 100Pa) and perform 80°C / 4 hours, 140°C / 1.5 hours, 190°C / 1.5 hours and 240°C / 2 Hours of firing in stages. Then, the film-coated glass substrate was immersed in a hot water bath at 80° C. for 1 hour, and the film was peeled off from the glass plate. The peeled film was...

Embodiment 1

[0176] Using the TDA / 1,3-BAPB polyimide film made in Manufacturing Example 1 as a substrate, the ITO made in the anodic film-forming process of Comparative Example 1 (b) was heat-treated under the following conditions. In addition, An organic EL element was fabricated under the same conditions as in Comparative Example 1.

[0177]

[0178] Put the polyimide substrate with the amorphous ITO film made in the anode film-forming process into the furnace core tube that has formed a vacuum (continuous exhaust with a rotary pump, pressure 4.0Pa), and perform heat treatment according to the following conditions, so that Amorphous ITO is crystallized.

[0179] Room temperature~200℃(2.3℃ / min)

[0180] 200℃~250℃(1.3℃ / minute)

[0181] 250°C (hold for 120 minutes)

[0182] 250℃~room temperature (8 hours, natural cooling)

[0183] For the ITO films produced in the above-mentioned Example 1 and Comparative Example 1, crystallization was determined by X-ray diffraction (CuKα), and light...

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Abstract

Disclosed are an image display device and an organic EL element, each of which involves at least a polyimide film substrate and an ITO electrode formed on the substrate, wherein the ITO electrode is a polycrystalline ITO electrode and the polyimide film contains a repeating unit represented by formula [1] in an amount of at least 10 mol%. Each of the image display device and the organic EL element involves a flexible polyimide film and has excellent element properties including light emission luminance. (In the formula, R1 and R2 independently represent a hydrogen atom, a halogen atom, or an alkyl group having 1 to 5 carbon atoms; R3, R4 and R5 independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 10 carbon atoms, an alkenyl group having 2 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, a cycloalkyl group having 3 to 7 carbon atoms, a nitril group, or a carboxyl group; and n represents a integer.)

Description

technical field [0001] The invention relates to an image display device and an organic electroluminescence element. Background technique [0002] Conventionally, glass has been used in electrical insulating films in various electronic devices, substrates for organic electroluminescence (hereinafter referred to simply as organic EL) displays, substrates for liquid crystal displays, substrates for electronic paper, and substrates for solar cells. [0003] However, recently, with the increase in screen size of these devices, the problem of increased weight due to the use of glass substrates, the use of display devices for mobile information communication equipment such as mobile phones, electronic notebooks, portable computers, etc. The problem of thinning of the glass substrate and damage to the glass substrate becomes serious. [0004] Therefore, it is required to use a plastic substrate that is lighter and more flexible, has impact resistance, and is easy to mold and proces...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/02C08G73/10C08J5/18G09F9/00G09F9/30H01L27/32H01L51/50H05B33/10H05B33/26
CPCH01L51/50H01L51/0096H05B33/28Y02E10/50H05B33/22C08G73/1078C08J2379/08C08J5/18Y02E10/549C08G73/105Y02P70/50H10K77/10H10K50/00
Inventor 内田孝幸若菜诚铃木秀雄野田尚宏
Owner TOKYO KOGEI UNIV
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