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Acridine compound and light-emitting device

A technology of light-emitting devices and compounds, which is applied in the field of acridine compounds and light-emitting devices, can solve the problems that the performance of TADF-OLED needs to be improved, and achieve the effect of high triplet energy level.

Pending Publication Date: 2021-02-05
GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the performance of current TADF-OLEDs still needs to be improved

Method used

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  • Acridine compound and light-emitting device
  • Acridine compound and light-emitting device
  • Acridine compound and light-emitting device

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0107] A method for preparing a light-emitting device includes the following steps:

[0108] (1) First, clean the ITO substrate in the following order: 5% KOH solution ultrasonication for 15 minutes, pure water ultrasonication for 15 minutes, isopropanol ultrasonication for 15 minutes, and oven drying for 1 hour.

[0109] (2) Then transfer the substrate to UV-OZONE equipment for surface treatment for 15 minutes, and transfer it to the glove box immediately after the treatment.

[0110] (3) Evaporation and film formation are carried out subsequently: the hole injection layer, the hole transport layer, the light emitting layer, the electron transport layer, the electron injection layer, and the second electrode are prepared in sequence; -7 Torr, then slowly increase the current value so that the rate slowly increases to After the rate is stable, open the baffle for evaporation.

[0111] (4) Finally, perform UV curing and encapsulation, and then bake at 80°C for 30 minutes.

Embodiment 1～8

[0113] Using compounds M1-M8 as host materials of the light-emitting layer respectively, light-emitting devices 1-8 were prepared according to the structures, raw materials and preparation methods of the above-mentioned light-emitting devices.

[0114] Device performance testing equipment and methods:

[0115] The prepared light-emitting devices 1 to 8 were tested for their luminous performance by the IV-L test system. The machine model of the test system used was F-star CS2000A instrument, and the device performance is shown in Table 2:

[0116] Table 2

[0117] part number Maximum external quantum efficiency [%] 1 18.2％ 2 19.1％ 3 19.5％ 4 17％ 5 15％ 6 15.5％ 7 14.3％ 8 13.7％

[0118] From the data in Table 2, it can be seen that using the acridine compound of the present invention as the host material of the light-emitting layer improves the light-emitting efficiency of the device.

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Abstract

The invention relates to an acridine compound and an application thereof. The structural formula of the acridine compound is shown as a formula (I), wherein Ar is selected from substituted or unsubstituted aryl or substituted or unsubstituted heteroaryl, R1 and R2 are respectively and independently selected from H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl or substituted or unsubstituted heteroaryl, R1 and R2 are respectively and independently selected from H, substituted or unsubstituted alkyl, substituted or unsubstituted aryl or substituted or unsubstituted heteroaryl, and x is selected from oxygen or sulfur. The acridine compound provided by the invention has good electron transport performance and hole transport performance, so that the acridine compound can be used as a material of a hole transport layer and an electron transport layer, due to the fact that the acridine compound has a high triplet state energy level, the acridine compound becomes a good bipolar main body material, the acridine compound is used as the main body material of a light-emitting layer, more exciton energy can be transmitted to a light-emitting body, and the light-emittingefficiency of a light-emitting device is improved.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescence, in particular to an acridine compound and a light-emitting device. Background technique [0002] The traditional OLED (Organic Light Emitting Diode) light-emitting device is a sandwich-like structure, an electroluminescent device composed of a cathode, an anode and an organic functional layer added between the electrodes. OLED light-emitting devices are current-mode devices, electrons are injected through the electron injection layer, transported by the electron transport layer, and holes are injected through the hole injection layer, transported by the hole transport layer, electrons and holes recombine and emit light in the light-emitting layer , namely OLED electroluminescence. In recent years, organic electroluminescent devices (TADF-OLEDs) based on thermally activated delayed fluorescence mechanism have attracted extensive research interest as next-generation optoelectro...

Claims

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Application Information

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IPC IPC(8): C07F9/6568C09K11/06H01L51/54
CPCC07F9/65685C09K11/06C09K2211/104H10K85/657
Inventor 郑江波
Owner GUANGDONG JUHUA PRINTING DISPLAY TECH CO LTD