Abstract:
PROBLEM TO BE SOLVED: To provide a melt-processable random copolyimide having semicrystallinity, and exhibiting the (semi)crystallinity recoverable from its melt, and further to provide a method for producing the copolyimide. SOLUTION: This copolyimide is produced from a reaction product of (I) an aromatic dianhydride component comprising 3,3',4,4'-biphenyltetracarboxylic dianhydride (BPDA) and/or 3,3',4,4'-benzophenonetetracarboxylic dianhydride (BTDA), and an aromatic carboxylic dianhydride (ODPA) including 4,4'- oxydiphthalic dianhydride, (II) an aromatic diamine component selected from the group consisting of 1,3-bis(4-aminophenoxy)benzene (APB-134), 3,4'- oxydianiline (3,4'-ODA), 4,4'-oxydianiline (4,4'-ODA) and 1,4-diaminobenzene (PPD), and (III) an end-capping component.
Abstract:
The present invention relates to charge transport compositions containing a quinazoline derivative of formula I, II or III . The invention further relates to electronic devices in which there is at least one active layer comprising such charge transport compositions.
Abstract:
There is provided an organic electronic device having an anode, a hole injection layer, a photoactive layer, an electron transport layer, and a cathode. At least one of the photoactive layer and the electron transport layer includes a compound having Formula I where: R1 is the same or different and can be phenyl, biphenyl, naphthyl, naphthylphenyl, triphenylamino, or carbazolylphenyl; and one of the following conditions is met: (i) R2= R3 and is H, phenyl, biphenyl, naphthyl, naphthylphenyl, arylanthracenyl, phenanthryl, triphenylamino, or carbazolylphenyl; or (ii) R2 is H or phenyl; and R3 is phenyl, biphenyl, naphthyl, naphthylphenyl, arylanthracenyl, phenanthryl, triphenylamino, and carbazolylphenyl; When both R1 are phenyl, R2 and R3 can be 2-naphthyl, naphthylphenyl, arylanthracenyl, 9-phenanthryl, triphenylamino, or m-carbazolylphenyl.
Abstract:
This invention relates to anthracene derivatives that are useful in electroluminescent applications. It also relates to electronic devices in which the active layer includes such an anthracene derivative.
Abstract:
Organometallic complexes are provided having at least one charge transporting ligand, and methods for making the same, as well as devices and sub-assemblies including the same.
Abstract:
This invention relates to a composition including (a) a dopant, (b) a first host having at least one unit of Formula I, and (c) a second host compound. (Formula I). In Formula I: Ar1, Ar2, and Ar3 are the same or different and are H, D, or aryl groups. At least two of Ar1, Ar2, and Ar3 are aryl and none of Ar1, Ar2, and Ar3 includes an indolocarbazole moiety.
Abstract:
There is provided a green luminescent material having Formula I or Formula II; here R1 and R2 can be the same or different and can be hydrogen, alkoxy, tertiary alkyl, or cycloalkyl. R3 and R4 are the same or different and can be fluorine, aryl, or alkyl. There is also provided an organic electronic device containing the green luminescent material.
Abstract:
The present invention relates to charge transport compositions containing a quinazoline derivative of formula I, II or III . The invention further relat es to electronic devices in which there is at least one active layer comprising such charge transport compositions.
Abstract:
The present invention relates to charge transport compositions. The invention further relates to electronic devices in which there is at least one active layer comprising such charge transport compositions.