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Stacked organic light emitting device and preparation method thereof

An electroluminescent device, organic technology, applied in the direction of electric solid device, semiconductor/solid device manufacturing, electrical components, etc., can solve the problems of low transmittance and low efficiency, and achieve strong permeability, high luminous efficiency, The effect of preventing total reflection of light

Inactive Publication Date: 2014-09-10
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, more n-type and p-type doped layers are used as charge generation layers (such as n-type (Alq 3 :Li) and p-type (NPB:FeCl 3 )), or Al-WO 3 - Au, etc. are connected in sequence with multiple light-emitting units, but the transmittance is generally low and the efficiency is low

Method used

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  • Stacked organic light emitting device and preparation method thereof
  • Stacked organic light emitting device and preparation method thereof
  • Stacked organic light emitting device and preparation method thereof

Examples

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preparation example Construction

[0065] see figure 2 , a method for preparing a stacked organic electroluminescent device according to an embodiment, comprising the following steps:

[0066] Step S110: sequentially forming a hole injection layer, a first hole transport layer, a first light emitting layer and a first electron transport layer on the anode by vacuum evaporation to form a first light emitting unit on the anode.

[0067] Anodes are provided. The anode is indium tin oxide glass (ITO), aluminum zinc oxide glass (AZO) or indium zinc oxide glass (IZO).

[0068] Sonicate the anode with detergent, deionized water, acetone, ethanol, and isopropanol for 15 minutes each to remove organic pollutants on the anode surface, and then dry it for later use.

[0069] A hole injection layer, a first hole transport layer, a first light emitting layer and a first electron transport layer are successively formed on a clean and dry anode by vacuum evaporation to form a first light emitting unit on the anode.

[007...

Embodiment 1

[0105] The structure is ITO / MoO 3 / TAPC / BCzVBi / TPBi / Bphen:F4-TCNQ:Ta 2 o 5 / TCTA / BCzVBi / TAZ / Cs 2 CO 3 Fabrication of Ag / Ag Stacked Organic Electroluminescent Devices

[0106] (1) Provide an anode, the anode is indium tin oxide glass, expressed as ITO. Sonicate the anode with detergent, deionized water, acetone, ethanol, and isopropanol for 15 minutes each to remove organic pollutants on the anode surface, then dry it and set it aside;

[0107] (2) Hole injection layer, first hole transport layer, first light-emitting layer and first electron transport layer are sequentially formed on the surface of the anode by vacuum evaporation, the pressure of vacuum evaporation is 5×10 -3 Pa; the hole injection layer, the first hole transport layer, the first light-emitting layer and the first electron transport layer are stacked in sequence to form the first light-emitting unit stacked on the anode; wherein the hole injection layer is formed by molybdenum trioxide, the thickness 40 ...

Embodiment 2

[0114] The structure is AZO / V 2 o 5 / TCTA / Alq 3 / TPBi / TAZ:2T-NATA:Nb 2 o 5 / NPB / Alq 3 / Bphen / CsN 3 Fabrication of / Pt stacked organic electroluminescent devices

[0115] (1) Provide the anode, the anode is aluminum zinc oxide glass, denoted as AZO. Sonicate the anode with detergent, deionized water, acetone, ethanol, and isopropanol for 15 minutes each to remove organic pollutants on the anode surface, then dry it and set it aside;

[0116] (2) The hole injection layer, the first hole transport layer, the first light-emitting layer and the first electron transport layer are sequentially formed on the surface of the anode by vacuum evaporation, and the vacuum evaporation pressure is 2×10 -4 Pa; the hole injection layer, the first hole transport layer, the first light-emitting layer and the first electron transport layer are stacked sequentially to form the first light-emitting unit stacked on the anode; wherein the hole injection layer is formed by vanadium pentoxide, Th...

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Abstract

The invention relates to a stacked organic light emitting device and a preparation method thereof. The stacked organic light emitting device comprises an anode, a first light emitting unit, a charge generating layer, a second light emitting unit and a cathode which are sequentially stacked. The charge generating layer is formed by doping an electron transport material and a hole transport material in a metal oxide. The electron transport material is 4,7-diphenyl-1,10-phenanthroline, 1,2,4-triazole derivative or 2-(4'-tert-butytphenyl)-5-(4'-biphenylyl)-1,3,4-oxadiazole. The hole transport material is 2,3,5,6-tetrafluoro-7,7,8,8,-tetracyano-quinodimethane, 4,4,4-tri(naphthyl-1-phenyl-ammonium)triphenylamine or dinaphthyl-N,N'-diphenyl-4,4'-benzidine. The metal oxide is tantalum pentoxide, niobium pentoxide or vanadium dioxide. The light emitting efficiency of the stacked organic light emitting device is high.

Description

technical field [0001] The invention relates to the technical field of electroluminescence, in particular to a stacked organic electroluminescence device and a preparation method thereof. Background technique [0002] In 1987, C.W.Tang and Van Slyke of Eastman Kodak Company in the United States reported a breakthrough in the research of organic electroluminescence. A high-brightness, high-efficiency double-layer organic electroluminescent device (OLED) has been prepared using ultra-thin film technology. In this double-layer structure device, the brightness reaches 1000cd / m at 10V 2 , its luminous efficiency is 1.51lm / W, and its lifespan is more than 100 hours. [0003] The principle of OLED light emission is based on the action of an external electric field, electrons are injected from the cathode to the lowest unoccupied molecular orbital (LUMO) of organic matter, and holes are injected from the anode to the highest occupied orbital (HOMO) of organic matter. Electrons an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K71/166H10K85/6565H10K85/631H10K50/155H10K50/165
Inventor 周明杰王平黄辉陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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