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White organic electroluminescence device and preparation method thereof

A luminescent and organic technology, applied in the field of white organic electroluminescent devices and their preparation, can solve problems such as insufficient coverage, low color restitution coefficient, and changes in device emission spectrum, and achieve improved spectral stability and high color restitution coefficient , the effect of high luminous efficiency

Active Publication Date: 2015-08-05
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device has high luminous efficiency, but the characteristics of double-peak emission lead to insufficient coverage of the spectrum of the device in the white light region, so that the color restitution coefficient of the obtained white organic electroluminescent device is low, and, with the increase in luminance Improvement, the emission spectrum of the device has a great change

Method used

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  • White organic electroluminescence device and preparation method thereof
  • White organic electroluminescence device and preparation method thereof
  • White organic electroluminescence device and preparation method thereof

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preparation example Construction

[0068] The present invention also provides a preparation method of a white organic electroluminescent device, comprising:

[0069] forming an anode layer on the substrate;

[0070] A hole-dominated light-emitting layer is formed on the anode layer, the hole-dominated light-emitting layer is formed by doping a red organic light-emitting material and a green organic light-emitting material in a hole-type organic host material, and the red organic light-emitting material is Bis(2-phenylquinoline)-(2,2,6,6-tetramethyl-3,5-heptanedionate) iridium, the green organic light-emitting material is tris(2-phenylpyridine) iridium;

[0071] An electron-dominated light-emitting layer is formed on the hole-dominated light-emitting layer, and the electron-dominated light-emitting layer is formed by double-doping an orange organic light-emitting material and a blue organic light-emitting material in an electron-type organic host material, and the orange organic light-emitting material Bis-(2-...

Embodiment 1

[0100] Glass is used as the substrate; an anode layer of indium tin oxide (ITO) material is formed on the glass substrate, and the anode layer is chemically etched into strip electrodes with a width of 10 mm and a length of 30 mm, and the strip electrodes are cleaned with Ultrasonic cleaning of liquid and deionized water for 15 minutes and drying in an oven. The dried electrode was subjected to low-pressure oxygen plasma treatment with a voltage of 400 volts for 10 minutes on the ITO anode in an atmosphere with a vacuum degree of 10 Pa. Transfer to the organic evaporation chamber, in a vacuum of 1~2×10 -5 In Pa's organic evaporation chamber, a 50 nm thick hole transport layer was deposited on the anode layer sequentially at a TAPC evaporation rate of 0.05 nm / s, PQ 2 Ir(dpm) evaporation rate at 0.003nm / s, Ir(ppy) 2 2 nm thick PQ was deposited at an evaporation rate of 0.006 nm / s and a TCTA evaporation rate of 0.1 nm / s 2 Ir(dpm) and Ir(ppy) 2 Hole-dominated light-emitting lay...

Embodiment 2

[0104] Glass is used as the substrate; an anode layer of indium tin oxide (ITO) material is formed on the glass substrate, and the anode layer is chemically etched into strip electrodes with a width of 10 mm and a length of 30 mm, and the strip electrodes are cleaned with Ultrasonic cleaning of liquid and deionized water for 15 minutes and drying in an oven. The dried electrode was subjected to low-pressure oxygen plasma treatment with a voltage of 400 volts for 10 minutes on the ITO anode in an atmosphere with a vacuum degree of 10 Pa. Transfer to the organic evaporation chamber, in a vacuum of 1~2×10 -5 In Pa's organic evaporation chamber, a 50 nm thick hole transport layer was deposited on the anode layer sequentially at a TAPC evaporation rate of 0.05 nm / s, PQ 2 Ir(dpm) evaporation rate at 0.002nm / s, Ir(ppy) 2 2 nm thick PQ was deposited at an evaporation rate of 0.007 nm / s and a TCTA evaporation rate of 0.1 nm / s 2 Ir(dpm) and Ir(ppy) 2 Hole-dominated light-emitting lay...

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Abstract

The invention provides a white organic light-emitting device and a preparation method thereof. An electron hole leading luminous layer of the white organic light emitting device is formed by mixing both red organic light-emitting materials and green organic light-emitting materials into electron hole type organic host materials, and an electron leading luminous layer is formed by mixing orange organic light-emitting materials and blue organic light-emitting materials into electron type organic host materials. The light spectrum cover degree of the device in a visible light region can be improved due to the fact that the light-emitting materials have high luminous efficiency and different wave bands, so that a high color recovery coefficient is obtained, and accordingly, the white organic light-emitting device improves the luminous efficiency, luminance and light spectrum stability of the device on the premise of reducing working voltage of the device.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to a white organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device is a self-luminous device that generates light when charges are injected into an organic film between a hole-injecting electrode (anode) and an electron-injecting electrode (cathode) and electrons and holes combine and then annihilate . Organic electroluminescent devices have the characteristics of low voltage, high brightness, wide viewing angle, etc., so organic electroluminescent devices have been developed rapidly in recent years. Among them, white organic electroluminescent devices have become a research hotspot due to their application prospects in full-color display and solid-state lighting. [0003] For a long time, many research teams at home and abroad have started from the aspects of material synthesis and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
Inventor 周亮张洪杰邓瑞平冯婧
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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