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Organic electroluminescent device

An electroluminescent device, organic technology, applied in the direction of electroluminescent light source, electric solid device, electric light source, etc., can solve the problems affecting the spectral characteristics of the device, achieve the effect of improving luminous efficiency, ensuring color purity, and improving composite efficiency

Active Publication Date: 2007-09-05
BEIJING VISIONOX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because rubrene itself emits light, using it as a dopant causes the introduction of impurities

Method used

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  • Organic electroluminescent device
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  • Organic electroluminescent device

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

Embodiment 1: (part number OLED-1)

Glass / ITO / NPB / NPB: BiF 3 / NPB / Alq 3 / LiF / Al (1)

The specific preparation method of the organic electroluminescent device with the above structural formula (1) is as follows:

① Clean the glass substrate by ultrasonic method of boiling detergent and deionized water, place it under an infrared lamp and dry it, and vapor-deposit a layer of anode material on the glass with a film thickness of 180nm;

②Place the above-mentioned glass substrate with anode in a vacuum chamber, and evacuate to 1×10 -5 Pa, continue to vapor-deposit the hole transport layer on the above-mentioned anode layer film, first vapor-deposit a layer of NPB film, the rate is 0.1nm / s, and the thickness of the vapor-deposited film is 20nm; and BiF 3 The evaporation rate ratio is 1:1, BiF 3The doping concentration in NPB is 50wt%, the total evaporation rate is 0.1nm / s, and the evaporation film thickness is 10nm; then a layer of NPB thin film is evaporated, the rate is 0.1nm...

Example Embodiment

Example 2

Glass / ITO / HIL / NPB: BiF 3 (x%) / NPB / Alq 3 / LiF / Al (5)

The specific preparation method of the organic electroluminescent device with the above structural formula (5) is as follows:

① Clean the glass substrate by ultrasonic method of boiling detergent and deionized water, and dry it under an infrared lamp, and vapor-deposit a layer of anode material on the glass with a film thickness of 150nm;

② Put the above-mentioned glass substrate with the anode layer in the vacuum chamber, and evacuate to 1×10 -5 Pa, continue to vapor-deposit a layer of hole injection layer on the above-mentioned anode layer film, the vapor-deposited film thickness is 100nm, and then vapor-deposit the hole transport layer. 3 The evaporation rate ratio of 1:x, BiF 3 The doping concentration in NPB is x wt%, the total evaporation rate is 0.2nm / s, and the film thickness is 15nm; continue to evaporate a layer of NPB film, the evaporation rate is 0.1nm / s, and the film thickness is 20nm; In this ...

Example Embodiment

Example 3

Glass / ITO / NPB / NPB: BiF 3 (x%) / NPB / Alq / LiF / Al (6)

The specific preparation method of the organic electroluminescent device with the above structural formula (6) is as follows:

Steps ①, ③ and ④ are the same as in Example 1. In step ②, a layer of NPB is evaporated on the anode layer with a film thickness of 20nm, and then double-source co-evaporation is used for doping. NPB and BiF 3 The evaporation rate is 1:x, BiF 3 The doping concentration in NPB is x wt%, the total evaporation rate is 0.2nm / s, and the film thickness is 10nm; continue to evaporate a layer of NPB thin film, the evaporation rate is 0.1nm / s, and the film thickness is 20nm.

The device structure performance data of different doping concentrations are shown in Table 3 below, and the corresponding device performance diagram is shown in Figure 4:

Table 3 Device structure of doped part x wt% Driving voltage (V, @200nit) Current density (A / m 2 , 6V) Luminous Efficiency (cd / A, @200nit) NPB(50nm) 0 4.5...

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Abstract

The invention is concerned with the organic electroluminescence device, which consists of the anode layer, the organic function layer and the cathode layer, the organic function layer consists of the luminescence layer, the cavity injection layer, the cavity transmission layer, the electron injection layer, the electron transmission layer and at least one layer of the cavity bar layer, the characteristic is: at least one layer of the organic layer doping at least one material that selects from the halide of the bismuth or the oxide of the bismuth. The doping material can adjust the density of the cavity and electron in order to balance them, and also improve the stability of the organic function layer and the life of the organic electroluminescence device.

Description

technical field The present invention relates to an organic electroluminescent device (OLED), more particularly to an organic electroluminescent device having a doped hole transport layer and / or hole injection layer. Background technique Organic electroluminescent displays have a series of advantages such as self-illumination, low-voltage DC drive, full curing, wide viewing angle, light weight, simple composition and process, etc. Compared with liquid crystal displays, organic electroluminescent displays do not need a backlight source Large, low power, and its response speed can reach 1000 times that of liquid crystal displays, but its manufacturing cost is lower than that of liquid crystal displays with the same resolution. Therefore, organic electroluminescent displays have broad application prospects. The general structure of an organic electroluminescent device includes in turn: a substrate, an anode, an organic layer, and a cathode, and the organic functional layer in...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54H05B33/14
Inventor 邱勇谢静高裕弟段炼
Owner BEIJING VISIONOX TECH
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