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Organic light emitting device

An organic light-emitting device and organic technology, applied in the direction of light-emitting materials, electrical components, circuits, etc., can solve the problems of the luminous efficiency and lifespan of organic light-emitting display devices, and the inability of OLED to provide luminous efficiency and lifespan.

Pending Publication Date: 2021-12-03
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, OLEDs in blue pixels cannot provide sufficient luminous efficiency and lifetime, so that organic light-emitting display devices have limitations in luminous efficiency and lifetime.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 3

[0319] (1) Examples 1 to 3 (Ex1 to Ex3)

[0320] Compound "E11" in Formula 6 was used for EBL. The compound "Dopant 3-1" in Formula 4 was used as a dopant and the compound "Host 1" in Formula 2 was used as a host to form an EML. 2-Phenyl-9,10-bis(2,2'-bipyridin-5-yl)anthracene, compound "H1" in Formula 8, and compound "H31" in Formula 10 were used for HBL, respectively.

[0321] [Formula 14]

[0322]

[0323] The characteristics (ie, voltage (V), efficiency (Cd / A), color coordinates (CIE) and lifetime (T95)) of the OLEDs fabricated in Comparative Examples 1 to 15 and Examples 1 to 3 were measured and listed in Table 1.

[0324] Table 1

[0325]

[0326] As shown in Table 1, the lifetimes of the OLEDs in Comparative Examples 13 to 15 and Examples 1 to 3 using hosts whose anthracene nuclei were substituted with deuterium were significantly increased.

[0327]On the other hand, OLEDs in Examples 1 to 3 in which only the host whose nucleus was substituted with deuterium ...

Embodiment 7 to 9

[0343] 6. Embodiments 7 to 9 (Ex7 to Ex9)

[0344] The compound "Dopant 3-3" in Formula 4 was used instead of the compound "Dopant 3-1" of Examples 1 to 3.

[0345] The characteristics (ie, voltage (V), efficiency (Cd / A), color coordinates (CIE) and lifetime (T95)) of the OLEDs fabricated in Comparative Examples 31 to 45 and Examples 7 to 9 were measured and listed in Table 3.

[0346] table 3

[0347]

[0348] As shown in Table 3, the lifetimes of the OLEDs in Comparative Examples 43 to 45 and Examples 7 to 9 using hosts whose anthracene nuclei were substituted with deuterium were significantly increased.

[0349] On the other hand, the lifetimes of the OLEDs in Examples 7 to 9 using the host whose anthracene nucleus was deuterium-substituted only were compared to the OLEDs in Comparative Examples 43 to 45 using the host whose anthracene nucleus and the substituent were deuterium-substituted shorter. However, the OLEDs in Examples 7 to 9 provide sufficient lifetime with...

Embodiment 10 to 12

[0354] 8. Examples 10 to 12 (Ex10 to Ex12)

[0355] The compound "Dopant 3-4" in Formula 4 was used instead of the compound "Dopant 3-1" of Examples 1 to 3.

[0356] The characteristics (ie, voltage (V), efficiency (Cd / A), color coordinates (CIE) and lifetime (T95)) of the OLEDs fabricated in Comparative Examples 46 to 60 and Examples 10 to 12 were measured and listed in Table 4.

[0357] Table 4

[0358]

[0359] As shown in Table 4, the lifetimes of OLEDs in Comparative Examples 58 to 60 and Examples 10 to 12 using hosts whose anthracene nuclei were substituted with deuterium were significantly increased.

[0360] On the other hand, the lifetimes of the OLEDs in Examples 10 to 12 using the host whose anthracene nucleus was deuterium-substituted only were compared with the OLEDs in Comparative Examples 58 to 60 using the host whose anthracene nucleus and the substituent were deuterium-substituted shorter. However, the OLEDs in Examples 10 to 12 provide sufficient lifeti...

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PUM

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Abstract

The present disclosure relates to an organic light emitting device that includes a substrate; and an organic light emitting diode positioned on the substrate and including a first electrode; a second electrode facing the first electrode; a first emitting material layer including a first host of an anthracene derivative and a first dopant of a boron derivative and positioned between the first and second electrodes; and an electron blocking layer including an electron blocking material of a spirofluorene-substituted amine derivative and positioned between the first electrode and the first emitting material layer, wherein an anthracene core of the first host is deuterated.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2020-0065159 filed in the Republic of Korea on May 29, 2020 and Korean Patent Application No. 10-2021-0063695 filed in the Republic of Korea on May 17, 2021, all of which It is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates to organic light emitting devices, and more particularly, to organic light emitting diodes (OLEDs) having improved luminous efficiency and lifetime and organic light emitting devices including the same. Background technique [0004] Organic light emitting display devices including OLEDs have been the subject of recent research and development as demand for flat panel display devices with a small footprint increases. [0005] The OLED emits light by injecting electrons from a cathode serving as an electron injection electrode and holes from an anode serving as a hole inj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H01L51/56H10K99/00
CPCH10K85/624H10K85/615H10K85/636H10K85/626H10K85/633H10K85/657H10K85/6574H10K85/6572H10K50/11H10K50/18H10K85/658H10K59/12C09K11/06H10K85/654H10K50/131H10K50/19C09K2211/1007H10K85/631H10K59/38
Inventor 尹丞希金相范宋寅范枝连一志笹田康幸
Owner LG DISPLAY CO LTD