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Undoped red organic light-emitting device and preparation method thereof

An electroluminescence, non-doped technology, applied in the direction of electric solid device, semiconductor/solid state device manufacturing, electrical components, etc., can solve problems such as unfavorable industrial production, complex preparation process, increase device process cost, etc., and achieve good solubility. , high quantum efficiency, reducing the effect of concentration quenching effect and uneven dispersion

Inactive Publication Date: 2016-07-13
XIAN POLYMER LIGHT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Common red light emitting materials are (btp) 2 Ir(acac),(fbi) 2 Ir(acac),(DMQ) 2 Ir(acac), usually prepares organic electroluminescent devices by double-source co-evaporation with fluorescent hosts. The device structure is generally double-layered or multi-layered, and the preparation process is complicated, which increases the process cost of the device and is not conducive to industrialization. Production

Method used

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  • Undoped red organic light-emitting device and preparation method thereof
  • Undoped red organic light-emitting device and preparation method thereof
  • Undoped red organic light-emitting device and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment

[0052] The ITO anode layer on the ITO glass is laser etched into a 50mm square electrode, and then ultrasonically cleaned with cleaning solution and deionized water for 15 minutes, and dried with high-purity nitrogen after the process is completed.

[0053] Put the dried substrate into the plasma processing chamber and vacuumize it. When the vacuum value reaches the range of 30Pa, use 150w power to treat the ITO anode with oxygen plasma for 5min.

[0054] The hole injection layer PEDOT:PSS was prepared in a clean atmospheric environment. The spin coating parameters were selected as 4000rpm, and the spin coating time was 60s. After the preparation was completed, it was placed in a nitrogen glove box for annealing at 150°C.

[0055] The light-emitting layer is spin-coated on the hole transport layer, the organic mixed host material of the light-emitting layer is PVK, and the phosphorescent dopant material is Hex-Ir (piq) 3 , select chlorobenzene, dichlorobenzene or toluene as th...

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Abstract

The invention discloses an undoped red organic light-emitting device, which comprises a substrate, an anode, a hole injection layer, a light-emitting layer, an electron transfer layer, a buffer layer and a cathode, which are arranged in sequence from the bottom up. The device adopts iridium complexes as the light-emitting material, and the material has good dissolvability, can present high dispersibility in a host material to reduce concentration quenching effect and unequal dispersion phenomenon due to high-concentration doping, and can present high quantum efficiency. Meanwhile, the invention also provides a preparation method of the undoped red organic light-emitting device. The method is simple and prevents complex vapor plating process and expensive device cost; and a hole-type material PVK serves as the host material, and balance between electrons and holes is adjusted effectively, thereby facilitating compounding of the electrons and the holes in the light-emitting layer and greatly improving device efficiency.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to a non-doped red organic electroluminescent device and a preparation method thereof. Background technique [0002] An organic light emitting diode (OLED) is a device made of the phenomenon that carriers enter the organic solid layer from the positive and negative electrodes under the action of an electric field to recombine and emit light. [0003] Compared with LCD, OLED has full solid state, self-illumination, wide viewing angle, high definition, high brightness, high contrast, high response speed, ultra-thin, low power consumption, low temperature resistance, shock resistance, flexible display and double-sided display, etc. features. In view of this advantage, OLED has broad application prospects. [0004] The organic electroluminescent device structure includes: cathode, anode, hole injection layer, light emitting layer, electron transport layer. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/52H01L51/54H01L51/56
Inventor 张志勇赵青山刘星赵炜
Owner XIAN POLYMER LIGHT TECH
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