Condensed cyclic compound, organic light-emitting device including same, and electronic device including organic light-emitting device
Inventors
JUNG, Yongsik • KWON, Youngchun • Choi, Younsuk • KANG, Hosuk • Kwon, Eunsuk • SON, Jhunmo • JEON, Soonok • CHUNG, Yeonsook
Assignees
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Publication Number
US-12281106-B2
Publication Date
2025-04-22
Expiration Date
Abstract
Provided are a condensed cyclic compound, an organic light-emitting device including the condensed cyclic compound, and an electronic device including the organic light-emitting device. The condensed cyclic compound is represented by Formula 1, wherein R12 is a group represented by Formula 2-1 and R13 is a group represented by Formula 2-2.
Core Innovation
The disclosure concerns a condensed cyclic compound selected from Compounds 1 to 80 and 82 to 280, defined by Formula 1, and used as a host in an organic light-emitting device. The organic layer includes an emission layer that contains at least one condensed cyclic compound, and the device has a first electrode and a second electrode.
The organic light-emitting device further includes a hole transport region and an emission layer, and may further include an electron transport region, a hole injection layer, an electron blocking layer, a buffer layer, or a hole blocking layer. The emission layer includes a host and at least one dopant, including phosphorescent dopants and fluorescent dopants, and may include an optional organometallic compound of Formula 81 or a phosphorescent transition-metal organometallic compound defined through Formulas 81 and 81A.
The compound design rationale is based on steric effects from an ortho cyano and a condensed nitrogen ring to shorten conjugation and raise triplet energy. The disclosed compounds are also described as improving electron mobility and providing thermal stability via high glass transition and decomposition temperatures, supporting long device lifespan and OLED performance including low driving voltage and high efficiency.
Claims Coverage
The claim coverage centers on 2 independent claim scopes and related refinements: a condensed cyclic compound selection and an organic light-emitting device using that condensed cyclic compound in an emission layer. The dependent claims further specify host and dopant selection, blue light emission, and a narrower condensed cyclic compound range.
Condensed cyclic compound selection
A condensed cyclic compound selected from Compounds 1 to 80 and 82 to 280.
Organic light-emitting device with electrodes and condensed cyclic compound in the emission layer
An organic light-emitting device having first and second electrodes with an organic layer between them that includes an emission layer and at least one condensed cyclic compound.
Emission layer host with phosphorescent dopant
The emission layer includes a host made with at least one condensed cyclic compound and a phosphorescent dopant.
Blue light emission
The emission layer emits blue light.
Condensed cyclic compounds restricted to Compounds 82 to 120
The condensed cyclic compound selected from Compounds 82 to 120.
Device with blue emission and condensed cyclic compound in the emission layer
An organic light-emitting device with first and second electrodes and an organic layer containing an emission layer that includes at least one condensed cyclic compound, where the emission layer emits blue light.
Overall, the claim coverage centers on selecting a condensed cyclic compound within specified compound ranges and using it in an organic light-emitting device such that the emission layer includes the condensed cyclic compound as a host with a phosphorescent dopant, with additional narrowing to blue light emission.
Stated Advantages
Improved OLED performance including low driving voltage.
High efficiency.
High luminance.
High quantum efficiency.
Long device lifespan.
Thermal stability supported by high glass transition temperature (Tg) and high decomposition temperature (Td).
Improved electron mobility.
Raised triplet energy via steric effects to support emission performance.
Higher durability.
Electron/hole blocking and improved luminescence are described in connection with the device architecture.
The document states that substantial driving-voltage increase is avoided.
Documented Applications
Organic light-emitting device (OLED) implementations using the condensed cyclic compounds in an emission layer, including blue light emission with host and phosphorescent or fluorescent dopants.
Electronic apparatus/display use.
Organic light-emitting device applications with emission-layer configurations using the condensed cyclic compound as a host, including blue light emission and red/green emission.
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