Top radiation organic EL part with optical spectrum adjustable

A top emission and luminescence technology, applied in the direction of electric solid-state devices, electrical components, semiconductor devices, etc., can solve the problems of high equipment requirements, complicated process, high production cost, etc., and achieve adjustable spectral line bandwidth and luminous color The effect of adjusting and simplifying the production process

Inactive Publication Date: 2009-02-04
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In 2008, M.S.Kim et al. (M.S.Kim, C.H.Jeong, J.T.Lim, G.Y.Yeom, ThinSolid Films 2008, 516, 3590) of Sungkyunkwan University in South Korea adopted a Li / AL / Ag / composite cathode and regrown it A white-light top-emitting organic electroluminescent device was prepared by using one layer of refractive index matching layer, in which the refractive index matching layer was made of Alq 3 (51nm), ITO(63nm), ITO(63nm) / SiO 2 (42nm), the color coordinates of the white light device prepared by the third scheme reached (0.32, 0.34), and the maximum brightness reached 14500cd / m 2 , but ITO(63nm) / SiO 2 (42nm) increases the difficulty of the manufacturing process
Although these methods can be calculated to design a reasonable device structure to obtain an ideal emission spectrum, the process is complex, the equipment requirements are high, the production cost is high, and it is difficult to use conventional organic coating equipment to prepare. Therefore, it is necessary for us to study the adjustment. A Simple Method for the Emission Spectrum of Electromechanical Luminescent Devices

Method used

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  • Top radiation organic EL part with optical spectrum adjustable
  • Top radiation organic EL part with optical spectrum adjustable
  • Top radiation organic EL part with optical spectrum adjustable

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Will MoO x As a spectrum adjustment layer, the structure is Al / LiF / Alq 3 / Alq 3 :C545T / NPB / m-MTDATA / MoO x / Ag spectrally tunable top-emitting organic electroluminescent device with an inverted structure. The device is prepared in a multi-source organic molecule vapor deposition system. The specific preparation process is as follows:

[0043] [1] The silicon substrate is repeatedly scrubbed with toluene, acetone, ethanol, and deionized water in sequence, ultrasonically, and then dried;

[0044] [2] Place the treated substrate in a multi-source organic molecular vapor deposition system (see Chinese patent: ZL03110977.2, "Crucible evaporation source for organic electroluminescence coating machine"), the same A vacuum chamber contains an organic evaporation area (8 evaporation sources) and a metal evaporation area (2 evaporation sources). The two areas and each evaporation source are isolated from each other to avoid mutual contamination. The substrate can be rotated to ...

Embodiment 2

[0059] m-MTDATA:MoO x The co-doped layer is used as the spectrum adjustment layer, and the structure is Al / LiF / Alq 3 / Alq 3 :C545T / NPB / m-MTDATA / m-MTDATA:MoO x / Ag spectrally tunable inverted top emission organic electroluminescent device, the device is prepared in a multi-source organic molecule vapor deposition system, the specific preparation process is as follows:

[0060] [1] The silicon substrate is repeatedly scrubbed with toluene, acetone, ethanol, and deionized water in sequence and ultrasonicated;

[0061] [2] Place the processed substrate in a multi-source organic molecular vapor deposition system. The same vacuum chamber where the system is located contains an organic evaporation area (8 evaporation sources) and a metal evaporation area (2 evaporation sources). Each evaporation source is isolated from each other, avoiding mutual pollution, without breaking the vacuum of the system, the substrate can be rotated to the organic evaporation area or the upper part of ...

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Abstract

The invention belongs to the organic electroluminescence field, in particular to a top-emitting organic electroluminescent device having two structures and being capable of adjusting luminescent spectrums. The top-emitting device adopting an upright structure sequentially comprises a substrate, a metal anode, an organic function layer and a metal cathode, and a spectrum adjustment layer structure is introduced between the metal cathode and the organic function layer; and the top-emitting device adopting an inverted structure sequentially includes a substrate, a metal cathode, an organic function layer and a metal anode in structure, and a spectrum adjustment layer structure is introduced between the metal anode and the organic function layer. The introduction of the spectrum adjustment layer can adjust the spectral width of luminescent spectrum and the emission spectrum peak value of the top-emitting organic electroluminescent device, thereby changing the luminescent color of the device and finally realizing the top-emitting white light organic electroluminescent device with high brightness and high color-rendering indexes. The prepared top-emitting organic electroluminescent device with multiple photo-peaks and adjustable spectrums has the advantages of high brightness, high efficiency, less working procedure and simple process.

Description

technical field [0001] The invention belongs to the field of organic electroluminescence, and in particular relates to a top-emitting organic electroluminescence device with two structures that can adjust the luminescence spectrum. Background technique [0002] A common organic electroluminescent device is a device grown on a glass substrate with ITO as an anode. The light of this device is emitted from the ITO / glass substrate side, which is a bottom-emitting device. When such a device is applied to an active-driven OLED (AMOLED) display, there is a problem that the pixel driving circuit of the display device and the display light-emitting area compete with each other, and the aperture ratio of the device is limited. However, the light of the top-emitting organic electroluminescent device (TEOLED) is emitted from the side of the top electrode, and the pixel drive circuit is fabricated under the organic light-emitting device, thereby solving the problem of competition between...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54
Inventor 谢国华赵毅赵春梅陈平谢文法刘式墉
Owner JILIN UNIV
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