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Organic el device and display

An organic and organic layer technology, applied in electroluminescence light source, electric solid state device, electric light source, etc., can solve the problems of insufficient balance of luminous intensity, display application, insufficient half-life of luminous efficiency and brightness, etc. Excellent color reproduction performance, high efficiency and long-term stability

Active Publication Date: 2006-10-11
JOLED INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the white light-emitting organic EL device having the above-mentioned configuration has problems in that the emission spectrum varies greatly with current, and the half-life of luminous efficiency and luminance is insufficient for display applications
In addition, this organic EL device is insufficient in the balance of the respective luminous intensities in the blue, green and red wavelength regions.
Thus, it is impossible to obtain a display that is comparable to a CRT in terms of color reproduction performance by using this organic EL device

Method used

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  • Organic el device and display
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  • Organic el device and display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] In Example 1, reference was made as follows figure 2 Bottom-emitting organic EL device 1' is described.

[0071] First, a unit for an organic EL device is produced in which an ITO film (approximately 100 nm thick) as an anode 3 is formed on a substrate 2 composed of a glass plate of 30 mm × 30 mm, and the anode 3 except for the central 2 mm × 2 mm light Other areas than the emission area are masked with an insulating film (omitted in the figure) by using a photosensitive organic insulating material. Next, under the condition that the opening matches the exposed portion of the anode 3 (ITO) that will become each light-emitting region, a metal mask with an opening is configured on the upper side of the substrate 2 and close to the substrate 2, and at 10 -4 The following organic layers were sequentially formed by a vacuum evaporation method at a vacuum of Pa or lower.

[0072] First, as the hole transport layer 10, a film of m-MTDATA (4,4',4"-tris(3-methylphenylanilino)...

Embodiment 2

[0091] In Example 2, the organic EL device 1' was fabricated in the same manner as above, except that the blue light emitting layer 13 of Example 1 used a two-layer structure of a positive and negative charge transporting blue light emitting layer and an electron transporting light emitting layer as described below other than to obtain a well-balanced white light emission.

[0092] In Example 2, an organic EL device 1' was manufactured by the same procedure as in Example 1, except that the blue light emitting layer 13 was formed by the following procedure. First, a co-deposited film consisting of a mixture of DPVBi and α-NPD at a mixing ratio of 1:1 doped with 3% of BCzVBi as a blue light-emitting material as a host was formed to a thickness of 10 nm. Then, a co-deposited layer consisting of DPVBi doped with 3% of BCzVBi as a blue light emitting material as a host doped with a thickness of 20 nm was formed to obtain a blue light emitting layer 13 having a laminated structure. ...

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Abstract

An organic EL device for stably emitting light including well-balanced red, green, and blue light components suitable for full-color display with high efficiency for a long period of time. The organic EL device (1) comprises an anode (3), a cathode (5), and an organic layer (4) interposed between the anode and the cathode (3, 5) and consisting of a light emitting layer comprising A red light emitting layer (11), a green light emitting layer (12), and a blue light emitting layer (13) are sequentially formed on the anode (3) side. The red light-emitting layer (11) contains a hole-transporting light-emitting material and has hole-transporting properties. The green light-emitting layer has both positive and negative charge carrier transport properties. The blue light-emitting layer has electron transport properties and is composed of both positive and negative charge carrier transport blue light emission layers and electron transport blue light emission layers sequentially formed from the anode (3) side.

Description

technical field [0001] The present invention relates to an organic EL device in which an organic layer includes a plurality of light-emitting layers interposed between an anode and a cathode, and a display using the organic EL device. Background technique [0002] In recent years, as a display to be used in place of a cathode ray tube (CRT), a light-weight and low-power consumption flat panel display has been the target of active research and development. Among flat panel displays, those using self-luminous display devices (so-called light emitting devices) such as organic EL (Electroluminescence) devices and organic EL devices have been noted as displays capable of being driven with low power consumption. [0003] A configuration for realizing a full-color display mode with a display using the above-mentioned light-emitting device includes a display in which an organic EL device capable of emitting white light is combined with a color filter that transmits only blue, green,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/12C09K11/06H05B33/14H05B33/22H05B33/26H10K99/00
CPCC09K11/06C09K2211/1007H05B33/14H05B33/26H10K85/60H10K85/633H10K85/631H10K85/654H10K85/657H10K85/324H10K50/125H05B33/22
Inventor 柏原充宏松浦亮子
Owner JOLED INC
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