Bis-phenanthroimidazolyl compound and electroluminescent device using the same

Abstract

A bis-phenanthroimidazolyl compound having a following formula is disclosed. Where A1 and A2 comprise identical or different aromatic rings, A3 comprises a polyaromatic hydrocarbon or at least two aromatic groups, and each carbon in A1 to A3 and phenanthrol groups is independently substituted or non-substituted. The bis-phenanthroimidazolyl compound exhibits relatively better thermal properties with higher glass-transition temperature and efficient blue emission. The bis-phenanthroimidazolyl compound may function as a host emitter or charge-transporter. An electroluminescent device is also disclosed.

Description

technical field The present invention relates to a kind of bis-phenanthroimidazolyl compound (bis-phenanthroimidazolyl compound) and its electroluminescent device, especially a kind of bis-phenanthroimidazolyl compound, which is used as the blue-light main luminescent material or electron transport in the organic light-emitting diode Material. Background technique Since organic light emitting diodes (Olganic light emitting diodes, OLEDs) have advantages in being used in flat panel displays, many researchers are interested in OLEDs. Among them, the development of stable and high-efficiency three-primary-color (red, green, blue) light-emitting materials and light-emitting devices is very important for the development of OLEDs into commercial products. An important requirement for the development of organic electroluminescent devices is to develop RGB (red, green and blue) light emitting devices to meet the requirements of color flat panel displays. In particular, efficient ...

AI Technical Summary

Problems solved by technology

However, so far, the chromaticity y coordinate (Commission Internationaley coordinate value, (CIE y ))≤0.15 efficient materials are very rare

There is still a lack of good organic electroluminescent compounds to meet the above needs

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