Tsinghua University

Fang-Iy Wu

Chien-Hong Cheng

Yu-Han Chen

Yin-Yen Tsai

Cheng-An Wu

Chin-Hsien Chen

Cheng-Hung Shih

Charng-Hsing Liu

The present invention discloses a phosphor material for organic optoelectronic devices. The phosphor is a complex comprising a metal (Ir or Pt) and an aryl-modified beta-diketone ligand. The complexes of this invention are useful to function as an emitter in the emissive layer of an organic light emitting diode, even as the complex is the main component of this layer.

Beta-diketone ancillary ligands and their metal complexes used in organic optoelectronic devices

An m-terphenyl derivative has a structure of formula (I) or (II): wherein A and B are five-membered heterocyclic compounds selected from the group consisting of pyrrole, pyrazole, imidazole, 1,2,3-triazole, 1,2,4-triazole, 1,2,3,4-tetrazole, 1,2-thiazole, 1,3-thiazole and 1,3,4-thiadiazole, each of substituents R, Rand Ris a member independently selected from the group consisting of H, halo, cyano, trifluoromethyl, amino, C-Calkyl, C-Calkenyl, C-Calkynyl, C-Ccycloalkyl, C-Ccycloalkenyl, C-Cheterocycloalkyl, C-Cheterocycloalkenyl, aryl and heteroaryl. The compound of the present invention may have advantages in good electron affinity, low HOMO and thereby achieving hole blocking and may be used for electron transport material and/or electron injection material.

[object Object]

Disclosed is a triphenylene based aromatic compound, wherein a benzene center is substituted with a triphenylene group and another aromatic group such as triphenylenyl, pyrenyl, phenylvinyl, carbazolylphenyl, or arylanthryl in the meta position of the benzene center. The meta-substituted aromatic compound of the invention has better thermal stability (Tg) than the conventional para-substituted aromatic compound. The meta-substituted aromatic compound, served as a hole transporting layer or a host material applied in a light emitting layer in an OLED, is more preferable than the conventional para-substituted aromatic compound.

Triphenylene based aromatic compounds and OLEDs utilizing the same

A 9,10-bisphenylphenanthrene derivative has a structure of formula (1): 

9,10-bisphenylphenanthrene derivative and organic light emitting diode using the same

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.

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Hsinchu, Taiwan

Fang-Iy Wu