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Tandem organic light emitting device (OLED) and method for producing same

An electroluminescent device and device technology, which is applied in the direction of electric solid-state devices, semiconductor/solid-state device manufacturing, electrical components, etc., can solve the problem that the life of the device is difficult to improve

Inactive Publication Date: 2012-09-05
CHONGQING NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the lifetime of the device has been difficult to improve to an ideal level

Method used

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  • Tandem organic light emitting device (OLED) and method for producing same
  • Tandem organic light emitting device (OLED) and method for producing same
  • Tandem organic light emitting device (OLED) and method for producing same

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Experimental program
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Embodiment

[0037] 1. Substrate treatment

[0038] Substrate: Generally, the substrate required for the preparation of OLEDs is ITO glass, which is characterized by transparency and good conductivity. The so-called ITO film is indium oxide (In 2 o 3 ) and tin oxide (SnO) are mixed with two metal oxides. Generally, the content of tin accounts for about 10%. ITO thin films are usually deposited on glass substrates by sputtering. The substrate used in the preparation of OLEDs is ITO transparent conductive glass (thickness of glass is 0.5mm) purchased directly from a glass company. The specific parameters of the factory inspection report are as follows:

[0039] Conductive layer thickness, standard Surface topography measurement

[0040] Conductive layer resistance, standard <100Ω / port, measured by resistivity meter <77.2Ω / port,

[0041] Transmittance, standard T>86%, measured by spectrophotometer T>88.3%,

[0042] Flatness, standard 0.25μm / 20mm, measured by surface topography instr...

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Abstract

The invention relates to a tandem organic light emitting device (OLED) which can generate three primary color emission and white light. The OLED adopts the glass as the substrate on which an anode, a hole transporting layer, a light emitting layer, an electron transporting layer, a connecting layer, another hole transporting layer, another light emitting layer, another electron transporting layer and a cathode are connected in sequence, wherein the key part of the connecting layer adopts a bipolar carrier transporting material FPD Mg-doped or Li-doped thin film. Compared with the common standard device adopting the connecting layer which is formed by unipolar carrier transporting material, the high-efficiency OLED is about 2.2 times the current efficiency of the common standard device.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescent devices. Background technique [0002] Organic electroluminescent device technology (OLED, Organic Light Emitting Devices) has become one of the most promising high-tech fields in the 21st century (Robert F, Science, 310, 1762 (2005), S.R.Forrest, Nature, 428, 911 ( 2004)). So far, although researchers from all over the world have greatly improved various indicators of device performance by selecting suitable organic materials and rationally designing device structures (Rico Meerheim et al., Appl.Phys.Lett., 89, 061111 (2006)). However, the lifetime of devices has been difficult to improve to an ideal level. One of the important reasons affecting the lifetime of OLEDs is that the large current flowing through the device causes thermal aging of the device (Jianru Gong et al., J. Phys. Chem. B, 109, 1675 (2005)). Therefore, it is urgent to study a high-efficiency device that o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56
CPCH10K59/32
Inventor 牛连斌关云霞
Owner CHONGQING NORMAL UNIVERSITY