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Organic electroluminescent element and lighting device

An electroluminescence element and luminescence technology, applied in lighting devices, electroluminescence light sources, electrical components, etc., can solve problems such as white light emission spectrum control

Active Publication Date: 2017-05-10
XIANYANG CHVT NEW DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, in conventional organic EL elements, it cannot be said that the white color obtained by emitting light from the three light-emitting layers of red, blue, and green has a wide range of color temperature and high color rendering. The emission spectrum of light is fully controlled
In other words, existing organic EL elements do not necessarily have sufficient performance as a light source for lighting devices.

Method used

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  • Organic electroluminescent element and lighting device
  • Organic electroluminescent element and lighting device
  • Organic electroluminescent element and lighting device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] In Example 1, a Figure 4 An organic EL element with the element structure shown. Specifically, first, an ITO film having a thickness of 150 nm, a width of 2 mm, and a sheet resistance of about 10 Ω / □ was formed to prepare a soda lime glass substrate with a thickness of 0.7 mm. The substrate was ultrasonically cleaned with neutral detergent, ion-exchanged water, acetone, and isopropanol for 5 minutes each, then spin-dried, and then UV / O 3 deal with.

[0126] Next, the crucibles (made of tantalum or alumina) for vapor deposition in the vacuum vapor deposition apparatus are respectively filled with Figure 4 The constituent materials of the layers are shown. The above-mentioned substrate is set in a vacuum evaporation device, and the vacuum degree is 1×10 -4 Under a reduced pressure environment below Pa, the crucible for vapor deposition was heated by energization, and each layer was vapor-deposited with a predetermined film thickness at a vapor deposition rate of 0.1...

Embodiment 2

[0131] In Example 2, using the same production method as in Example 1 above, a Figure 7 An organic EL element with the element structure shown. The organic EL element of this Example 2 was evaluated by the same method as in Example 1 above. Figure 8 as well as Figure 9 Indicates its evaluation result. in addition, Figure 8 Indicates the evaluation results in the absence of the optical film, Figure 9 The evaluation result in the case where an optical film exists is shown.

Embodiment 3

[0133] In Example 3, using the same production method as in Example 1 above, a Figure 10 An organic EL element with the element structure shown. The organic EL element of this Example 3 was evaluated by the same method as in Example 1 above. Figure 11 as well as Figure 12 Indicates its evaluation result. in addition, Figure 11 Indicates the evaluation results in the absence of the optical film, Figure 12 The evaluation result in the case where an optical film exists is shown.

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Abstract

This organic electroluminescent element comprises, between a negative electrode and a positive electrode, a plurality of light emitting units, each of which comprises at least a light emitting layer that is formed of an organic compound. With respect to this organic electroluminescent element, white light obtained by light emission of the plurality of light emitting units has an emission spectrum (S) that is continuous at least over a wavelength range of 380-780 nm. The emission spectrum (S) has one peak wavelength (p1) in a red wavelength range (R) of 600-780 nm, one or two peak wavelengths (px, py) in a green wavelength range (G) of 490-600 nm, and two peak wavelengths (p2, p3) in a blue wavelength range (B) of 380-490 nm.

Description

technical field [0001] The invention relates to an organic electroluminescent (EL) element and a lighting device. [0002] This application claims the priority of Japanese Patent Application No. 2014-148305 for which it applied on July 18, 2014, The content is used here. Background technique [0003] The organic EL device is a self-luminous device having a light-emitting layer made of an organic compound between a cathode and an anode that face each other. In an organic EL element, when a voltage is applied between the cathode and the anode, excitons are generated by the recombination of electrons injected into the light-emitting layer from the cathode side and holes (holes) injected into the light-emitting layer from the anode side in the light-emitting layer (exciton) to shine. [0004] Tang et al. of Eastman Kodak proposed a structure in which organic compounds having different carrier transport properties are stacked and electrons and holes are injected in a well-balan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/12H01L51/50
CPCH05B33/12H10K50/131H10K2101/27
Inventor 森本满田中纯一
Owner XIANYANG CHVT NEW DISPLAY TECH CO LTD