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US 2018/0323384 A1Published application
Platinum (ii) emitters for oled applications
AssigneeVersitech Limited
InventorsChi Ming Che, Chi Fai Kui, Chi Chung Kwok
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Abstract
Described herein are novel platinum(II) emitters. These materials show high emission quantum efficiency, a low self-quenching constant and are stable in thermal deposition process. Organic light-emitting diodes (OLEDs) fabricated from these materials can have pure green emission, high efficiency and low efficiency roll-off. The OLEDs can have a chemical structure of:
Claims18
An organic light-emitting diode (OLED) emitter having a chemical structure of Structure I:
- wherein R1-R13 are independently hydrogen, halogen, hydroxyl, an unsubstituted alkyl, a substituted alkyl, cycloalkyl, an unsubstituted aryl, a substituted aryl, acyl, alkoxy, acyloxy, amino, nitro, acylamino, aralkyl, cyano, carboxyl, thio, styryl, aminocarbonyl, carbamoyl, aryloxycarbonyl, phenoxycarbonyl, or an alkoxycarbonyl group, each pair of adjacent R groups of R1-R13 can independently join together to form a 5-8 member ring(s);
- wherein B is a hydrocarbon group containing 1 to 24 carbon atoms or a substituted aryl group;
- and
- wherein
- is a spiro-linkage.
2 more elements
Dependencies are inferred from the claim text.