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Structure for realizing medium-/high-frequency alternating-current driving of OLED by using TADF

A high-frequency AC and AC drive technology, applied in the manufacturing of electrical components, electro-solid devices, semiconductor/solid-state devices, etc., can solve the problems of process complexity and complex DC drive integration, achieve simple and controllable processes, and improve quantum efficiency. , promote the effect of injection

Inactive Publication Date: 2020-02-28
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention proposes a structure that utilizes TADF to realize medium-high frequency AC driving OLED, which can solve the complexity of integration caused by the addition of a power conversion device for the existing DC drive, and the complexity of the process caused by the need for a multi-layer film structure for the existing AC drive.

Method used

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  • Structure for realizing medium-/high-frequency alternating-current driving of OLED by using TADF
  • Structure for realizing medium-/high-frequency alternating-current driving of OLED by using TADF
  • Structure for realizing medium-/high-frequency alternating-current driving of OLED by using TADF

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preparation example Construction

[0051] The structure of using TADF to realize medium and high frequency AC driven OLED, its preparation method comprises the following steps;

[0052] Step B1, using the anode layer substrate as the anode electrode layer;

[0053] Step B2, forming a first piezoelectric functional layer on the anode electrode layer by a deposition process; then forming a light-emitting layer on the first piezoelectric functional layer by a deposition process; and then forming a second piezoelectric functional layer on the light-emitting layer by a deposition process ; Finally, a cathode electrode layer is formed on the second piezoelectric functional layer by a deposition process.

[0054] Both the piezoelectric functional layer and the luminescent layer are formed by a solution method or a vacuum evaporation method; the solution method includes spin coating, dip coating, blade coating, spray coating, screen printing, slit coating or spray coating. ink printing.

[0055] The frequency range o...

Embodiment 1

[0059] In this example, the structure of using TADF to realize medium and high frequency AC driving OLED is an OLED device with a laminated structure, including a conductive anode (anode electrode layer) deposited sequentially on the light-emitting surface, and two piezoelectric functional layers (the first Piezoelectric functional layer, the second piezoelectric functional layer) and a sandwich structure composed of a light-emitting layer in between, a conductive cathode (cathode electrode layer); two electrode layers form two transparent electrodes; applied between the two transparent electrodes AC drive signal; the light emitting surface adopts glass substrate.

Embodiment 2

[0061] In Embodiment 1, the material of the first piezoelectric functional layer and the second piezoelectric functional layer is silicic acid, which has a high dielectric constant and is a transparent material, which can be used as a preferred inorganic insulating functional layer material.

[0062] The thickness of the piezoelectric functional layer is 5-50nm. In this thickness range, the insulating effect is better, and the response speed of the organic light-emitting device can be accelerated, and at the same time, the organic light-emitting device can be packaged, that is, the organic light-emitting device can be packaged. Light-emitting devices have a good protective effect. If it is lower than this range, the insulating dielectric layer cannot encapsulate the organic light-emitting device; if it is higher than this range, although it can protect the organic light-emitting device, it reduces the response speed of the OLED device and reduces the actual effect of the produ...

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Abstract

The invention provides a structure for realizing medium- / high-frequency alternating-current driving of an OLED by using TADF. The structure comprises a light emitting layer made of an intramolecular bipolar TADF material or an intermolecular double-subject TADF material. The top face and the bottom face of the light emitting layer are each covered with a piezoelectric function layer made of an organic piezoelectric polymer material. The two piezoelectric functional layers are powered and driven by an electrode layer. The electrode layer is connected with an alternating-current driving circuit.The alternating-current driving circuit is a medium- / high-frequency alternating-current driving circuit driven by voltage or current. According to the invention, the problem of integration complexitycaused by the need of additionally arranging a power supply conversion device in the existing direct-current drive and the problem of process complexity caused by the need of a multilayer film structure in the existing alternating-current drive can be solved.

Description

technical field [0001] The invention relates to the technical field of organic luminescent materials, in particular to a structure for realizing mid-high frequency AC driving OLED by using TADF. Background technique [0002] OLED has the advantages of high brightness, high contrast, wide viewing angle, fast picture response, low energy consumption and flexible processing. OLED display technology has achieved great success in smartphones and TVs, and is considered to be the next generation of mainstream display technology. OLEDs have different driving methods. The traditional OLED device is usually driven by direct current, and electrons and holes are injected from the cathode and anode respectively, and recombine and emit light in the light-emitting material through the electron transport layer and the hole transport layer. Under DC drive, in order to achieve carrier injection balance, OLED devices usually adopt a multi-layer film structure, the device structure is complex,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/52
CPCH10K50/11H10K50/00H10K50/844
Inventor 郭太良刘欣叶芸李福山胡海龙江宗钊
Owner FUZHOU UNIV
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