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Organic light emitting diode and organic light emitting device including the same

A light-emitting diode and organic technology, applied in the manufacture of electrical components, electrical solid devices, semiconductor/solid devices, etc., can solve problems such as low luminous efficiency and color purity, short luminous life of metal complexes, and inapplicability

Pending Publication Date: 2021-04-27
LG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the luminescence lifetime of metal complexes as representative phosphorescent materials is too short to be applied in commercial devices
In particular, blue phosphorescent materials show low luminous efficiency and color purity

Method used

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  • Organic light emitting diode and organic light emitting device including the same
  • Organic light emitting diode and organic light emitting device including the same
  • Organic light emitting diode and organic light emitting device including the same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0258] Embodiment 1 (Ex.1): the manufacture of OLED

[0259] An OLED is fabricated in which the first EML (EML1) realizes TADF and the second EML (EML2) realizes TTA. The first EML comprises the compound 1-1 (2,6-bis(9H-carbazol-9-yl)pyridine, 2,6-CzPy, LUMO: -2.6eV in Chemical Formula 2 as the first host (H1); HOMO: -5.7eV) and Compound 2-1 in Chemical Formula 4 (TDBA-DI, LUMO: -2.6eV, HOMO: -5.5eV) as a thermally activated delayed fluorescence material (TD). The second EML contained Compound 5-1 (TBADN, LUMO: -2.6 eV, HOMO: -5.5 eV) in Chemical Formula 10 as the second host (H2). Each of the first EML and the second EML respectively contained Compound 3-1 (DNBAN-2, LUMO: −2.8 eV, HOMO: −5.4 eV) in Chemical Formula 6 as a fluorescent material. In addition, EBL contains TAPC (LUMO: -2.0eV, HOMO: -5.5eV).

[0260] The ITO substrates were washed by UV-ozone treatment and loaded into the evaporation system before use. The ITO substrate was transferred to a vacuum chamber fo...

Embodiment 2

[0263] Embodiment 2 (Ex.2): the manufacture of OLED

[0264] OLEDs were fabricated using the same materials as in Example 1, except that Compound 5-2 (ADN, LUMO: -2.6eV, HOMO: -5.8eV) in Chemical Formula 10 was used instead of TBADN as the second host in EML2.

Embodiment 3

[0265] Embodiment 3 (Ex.3): the manufacture of OLED

[0266] OLEDs were fabricated using the same materials as in Example 1, except that Compound 5-3 (PADN) in Chemical Formula 10 was used instead of TBADN as the second host in EML2.

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Abstract

The invention relates to an organic light emitting diode and an organic light emitting device including the same. The organic light emitting diode (OLED) includes a first emitting material layer disposed adjacently to a first electrode and a second emitting material layer disposed adjacently to a second electrode. The first emitting material layer includes a first compound having high affinity to holes and a second compound of thermally activated delayed fluorescent material, and the second emitting material layer includes a fourth compound having high affinity to electrons and implementing triplet-triplet annihilation. Two emitting material layers having adjusted energy levels allow the OLED to lower its driving voltages and improve its luminous efficiency and luminous lifetime.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2019-0133040 filed in the Republic of Korea on October 24, 2019 and Korean Patent Application No. 10-2020-0113939 filed in the Republic of Korea on September 7, 2020, which The entire contents are hereby incorporated by reference into this application. technical field [0003] The present disclosure relates to organic light emitting diodes, and more particularly, to organic light emitting diodes having excellent light emitting characteristics and organic light emitting devices having the same. Background technique [0004] Organic light emitting diodes (OLEDs) are gaining attention as light emitting diodes rapidly replace liquid crystal display devices (LCDs). OLEDs can be formed to be thinner than thin film, and can achieve unidirectional or bidirectional images depending on the electrode configuration. In addition, OLEDs can be formed on flex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/50H01L51/54H10K99/00
CPCH10K85/615H10K85/622H10K85/654H10K85/657H10K85/6572H10K50/11H10K2101/40H10K50/121H10K50/13H10K2101/10H10K85/658H10K85/626H10K50/19H10K2101/20H10K85/6574H10K85/631H10K50/18
Inventor 柳慧根崔益朗金捘演金成根李周永
Owner LG DISPLAY CO LTD