City University of Hong Kong

Cityu Research Limited

Zhi-Qiang Gao

Shuit-Tong Lee

Chun-Sing Lee

Liang-sun Hung

Chun-sing Lee

Baoxiu Mi

Bao-Xiu Mi

Liang-Sun Hung

Compounds of formula [I]wherein each Rto Ris independently selected from the group consisting of halogen atoms, cyano, isocyano, mercapto, amino, carbonyl, carboxy, sulfone, nitro and hydroxy groups, and optionally substituted alkyl, alkenyl, alkynyl, haloalkyl, hydroxyalkyl, aryl, alkoxy, aryloxy, alkylamino, arylamino, alkylarylamino, amide, alkylthio, arylthio, alkoxy carbonyl, siloxy, cyclic hydrocarbon or heterocyclic groups; each x is independently zero, one, two or three; each y is independently zero or one; and each z is independently zero, one, two or three are useful in organic electroluminescence devices. Such compounds are disclosed herein, as well as organic electroluminescence devices using the compounds in the emissive layer.

Red-emitting organic electroluminescent elements

Organic electroluminescent elements

An organic electroluminescent device such as a light-emitting diode is disclosed, in which the emission layer comprises a single emitting material at different aggregate state to obtain constant chromaticity white emission. Correspondingly, a novel configuration has been developed to get white emission and color change in the organic EL devices.

White and colored organic electroluminescent devices using single emitting material by novel color change technique

Growing community of inventors

Hong Kong, China

Zhi-Qiang Gao