Composition for organic optoelectronic device, organic optoelectronic device, and display device
Inventors
RYU, Dong Wan • SHIN, Chang Ju • Lee, Seungjae • Kim, Hyung Sun • JANG, Yuna • Yu, Eun Sun • Jung, Sung-Hyun
Assignees
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Publication Number
US-12310232-B2
Publication Date
2025-05-20
Expiration Date
Abstract
The present invention relates to a composition for an organic optoelectronic device, the composition comprising: a first host compound represented by Chemical Formula 1 below; and a second host compound represented by Chemical Formula 2 below, to an organic optoelectronic device using the composition and a display device. The details of Chemical Formulas 1 and 2 above are as defined in the specification.
Core Innovation
The invention provides a composition for an organic optoelectronic device comprising a first host compound represented by Chemical Formula 1-A and a second host compound represented by Chemical Formula 2. The first host compound is defined with X as O or S, with defined linker and substituent options, and is not “substituted” as defined for Chemical Formula 1-A. The second host compound is defined with Y1 and Y2, Z1 and Z2, R4 to R9, and m as an integer of 0 to 2, together with a defined meaning of “substituted” for Chemical Formula 2.
Using the defined first host compound and the defined second host compound in a light-emitting layer produces electron-injection characteristics in the first host and suppressed crystallization, enabling uniform thin-film formation with the second host. By selecting a second host compound with relatively high hole characteristics, charges are balanced in the light-emitting layer to realize a long life-span. The composition is used in an organic optoelectronic device architecture having an anode and a cathode with at least one organic layer between them.
Claims Coverage
The document provides one independent claim directed to a composition for an organic optoelectronic device, with structural definitions for two host compounds. Across the claim set, the main inventive features are the first host compound of Chemical Formula 1-A, the second host compound of Chemical Formula 2, and incorporation of the composition into an organic optoelectronic device. In total, the independent claim set includes 1 independent claim.
Composition with first host compound and second host compound
A composition for an organic optoelectronic device comprising a first host compound represented by Chemical Formula 1-A and a second host compound represented by Chemical Formula 2, where Chemical Formula 1-A defines X as O or S, linker and substituent options, and a non-“substituted” restriction, and Chemical Formula 2 defines Y1 and Y2, Z1 and Z2, R4 to R9, and m as an integer of 0 to 2, with “substituted” defined for Chemical Formula 2.
Organic optoelectronic device architecture using the composition
An organic optoelectronic device includes an anode and a cathode with at least one organic layer between them, wherein the organic layer includes the composition.
Composition as a host for a light emitting layer
The at least one organic layer includes a light emitting layer, and the composition is a host of the light emitting layer.
Overall, the claims cover a host-compound composition defined by Chemical Formula 1-A and Chemical Formula 2, and its incorporation into an organic optoelectronic device, including use as a host for a light emitting layer.
Stated Advantages
Improved low-voltage behavior of devices using the first and second host combinations compared with comparative device examples.
Improved luminous efficiency of devices using the first and second host combinations compared with comparative device examples.
Improved T95 lifespan, or longer lifetime, of devices using the first and second host combinations compared with comparative device examples.
The electron-injection characteristics and suppressed crystallization enable uniform thin-film formation with the second host.
Selecting the second host with relatively high hole characteristics balances charges in the light-emitting layer.
The charge-balanced operation realizes a long life-span.
The disclosure states high efficiency.
Documented Applications
Organic light emitting diode (OLED) device example using the disclosed composition as a host structure in a light emitting layer with a phosphorescent dopant.
An organic optoelectronic device, including an organic light emitting diode (OLED), and mention of display device use.
A light emitting layer within the organic optoelectronic device, where the composition is used as a host for the light emitting layer.
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