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Composite material, light emitting element using the same, light emitting device, and electric apparatus

A technology of composite materials and light-emitting elements, applied in the directions of light-emitting materials, chemical instruments and methods, can solve the problems that light cannot be effectively extracted, reduce the luminous efficiency of components, etc., and achieve high visible light transmittance, low excitation voltage, and good luminescence. The effect of efficiency

Inactive Publication Date: 2009-09-09
SEMICON ENERGY LAB CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, as seen from the embodiment modes of the present invention, in the mixed layer of an organic compound and a metal oxide (which is disclosed in Patent Document 1), a large The absorption peak, therefore, there is a problem of light transmission performance
Therefore, the light formed inside the element cannot be effectively extracted, thus reducing the luminous efficiency of the element

Method used

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  • Composite material, light emitting element using the same, light emitting device, and electric apparatus
  • Composite material, light emitting element using the same, light emitting device, and electric apparatus
  • Composite material, light emitting element using the same, light emitting device, and electric apparatus

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Embodiment approach 1

[0211] In Embodiment 1, a production example of the composite material of the present invention will be described. Further, the present invention is not limited to these embodiments, but the scope of the claims defines the present invention. The same is true for embodiment 2. In Embodiment 1, a manufacturing example of a composite material will be described in detail.

manufacture Embodiment 1

[0212] "Manufacturing Example 1" (DTDPPA+MoOx)

[0213]First, a glass substrate is fixed to a substrate holder in a vacuum evaporation apparatus. Then, pour DTDPPA (N, N'-two (p-tolyl)-N, N'-diphenyl-p-phenylenediamine) independently in different resistance heating type evaporation sources (it is represented by general structure ( 14) represents) and molybdenum oxide (valence of molybdenum: VI). in which the pressure is reduced to about 10 -4 Thin films were formed by using the composite material of the present invention by co-evaporation of DTDPPA and molybdenum oxide under vacuum conditions of Pa. In this case, the evaporation rate of DTDPPA was 0.4 nm / s, however molybdenum oxide was evaporated in an amount 1 / 4 of the amount of DTDPPA. The thickness of the film containing DTDPPA and molybdenum oxide was set to 50 nm.

[0214] exist Figure 11A The measurement results of the absorption spectrum of the composite material of DTDPPA and molybdenum oxide are shown in . Such...

manufacture Embodiment 2

[0215] "Manufacturing Example 2" (DPAB+MoOx)

[0216] Manufacture the composite material that contains DPAB and molybdenum oxide in the same manner as Manufacturing Example 1, the difference is to use DPAB (4,4'-bis[N-(4-diphenylaminobenzene) represented by structural formula (93) base)-N-phenylamino]biphenyl) to replace the DTDPPA of Manufacturing Example 1. exist Figure 11B The measured results of the absorption spectra of composites containing DPAB and molybdenum oxide are shown in . Such as Figure 11B As shown, no significant absorption was observed in the visible region (400-700 nm). Further, absorption which was not observed in a single film containing only DPAB or a single film containing only molybdenum oxide was formed near 900 nm. This indicates the formation of voids.

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Abstract

A composite material includes an organic compound represented by the following general formula (1) and an inorganic compound, where, in the general formula (1), R<1> to R<24> is identical to or different from one another, and represent any of hydrogen, an alkyl group, an alkoxy group, an aryl group, and an arylalkyl group. A light emitting element includes the composite material and a light emitting device and an electronic appliance includes the light emitting element. The composite material has an excellent carrier transporting property and an excellent carrier injecting property with respect to the organic compound along with high visible light transmittance. By utilizing the composite material, a current excitation type light emitting element requiring low driving voltage and having excellent light emitting efficiency is obtained. By using the light emitting element, a light emitting device consuming low power and an electronic appliance including the light emitting device is provided.

Description

technical field [0001] The present invention relates to a composite material formed using an organic compound and an inorganic compound, which has excellent carrier transport performance and excellent carrier injection performance for the organic compound and has high visible light transmittance. Furthermore, the present invention relates to a current excitation type light-emitting element using the composite material, and further relates to a light-emitting device having the light-emitting element and an electronic device including the light-emitting element. Background technique [0002] In recent years, research and development of light-emitting elements using light-emitting organic compounds has been actively conducted. In the basic structure of the light-emitting element described above, a layer containing a light-emitting organic compound is sandwiched between a pair of electrodes. By applying a voltage to the light emitting element, electrons and holes are respective...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50C09K11/06
Inventor 山崎舜平池田寿雄濑尾哲史坂田淳一郎岩城裕司
Owner SEMICON ENERGY LAB CO LTD