Eastman-kodak Company

US Government As Represented by the Secretary of the Army

Spectra Group Limited, Inc.

Jianmin Shi

Ching W Tang

Chin H Chen

Shiying Zheng

Kevin P Klubek

Douglas C Neckers

David Claude Morton

Eric W Forsythe

Tukaram K Hatwar

Douglas Robert Robello

Joseph C Deaton

Ralph H Young

Kathleen M Vaeth

Steven A Van Slyke

Christopher T Brown

Gopalan Rajeswaran

David J Giesen

Lelia Cosimbescu

Charles S Christ

The present invention relates to imidizo derivatives containing a plurality of imidizo moieties linked by aryl or heteroaryl groups. The resultant imidizo derivates may advantageously be used in organic electronic devices, such as multi-layer organic electroluminescent devices or organic photovoltaic devices, and in chemical sensing applications as a host material.

Imidizo derivatives

Compounds containing bibenzochalcogenophene structures are provided in which the chalcogenide is sulfur, selenium, or tellurium. The compounds are characterized by planarity, rigid conjugation structure and high charge mobility making them useful as organic semiconductor in optical devices, electronic devices and integrated devices like organic field effect transistors (OFET) for thin film transistor liquid crystal display (LCD), electrophoretic display such as electronic paper, organic light emitting diode (OLED) for flat panel displays, organic radio frequency identification (ORFID) tags, organic photovoltaic (OPV), sensor devices, and analog and digital electronics.

Bibenzothiophene derivatives

An organic EL device, comprising an anode and a cathode, and at least one organic luminescent layer comprising a compound of the formula: positioned between said anode and said cathode, and wherein:

Organic electroluminescent devices

Disclosed is a useful electroluminescent device comprising a cathode, an anode, and therebetween a light emitting layer containing a host material and a phosphorescent light-emitting material wherein the host material is represented by formula (1):X'-A-X&#x2033;&#x2003;&#x2003;(1)wherein:

Organic element for electroluminescent devices

Disclosed is a process for forming a N,N'-diarylquinacridone compound comprising the step of reacting a 1,4-dialkylcarboxylate-2,5-bis(N-arylamino) benzene with an iodoaryl compound to form the corresponding 2,5-bis(N-diarylamino) compound. The process is versatile and provides high yields and purity for the synthesis of N,N&#x2032;-diarylquinacridone compounds.

Synthesis for quinacridone compounds

An organic light emitting device includes a substrate, an anode and a cathode disposed over the substrate; a luminescent layer disposed between the anode and the cathode wherein the luminescent layer includes a host and at least one dopant; the host of the luminescent layer being selected to include a solid organic material comprising a mixture of at least two components wherein the first component of the mixture is an organic compound that is capable of transporting both electrons and holes and that is substantially non-polar; and the second component of the mixture is an organic compound that is more polar than the first component; and the dopant of the luminescent layer being selected to produce light from the light emitting device.

Organic light emitting diode devices with improved luminance efficiency

Electroluminescent device with polyphenyl hydrocarbon hole transport layer

Red organic electroluminescent devices

Electroluminescent devices having diarylanthracene polymers

Electroluminescent devices having diarylanthracene ladder polymers in emissive layers

An organic luminescent layer for use in an electroluminescent device with improved operating life includes an organic host material capable of sustaining both hole and electron injection and recombination. The layer also includes at least two dopants: a first dopant capable of accepting energy of electron-hole combinations in the host material; and a second dopant capable of trapping the holes from the host material. The first dopant being selected so that the bandgap energy of the first dopant is less than the bandgap energy of the host material and the second dopant being selected to have a hole trapping energy level above the valance band of the host material.

Organic electroluminescent devices with improved stability and efficiency

Electroluminescent device with anthracene derivatives hole transport layer

An organic electroluminescent device, including an anode and cathode and therebetween a hole transport layer; and an electron tranport layer disposed in an operative relationship with the hole transport layer; wherein the hole transport layer includes at least an aromatic hydrocarbon or fused hydrocarbon containing at least 20 carbon atoms and having an ionization potential greater than 5.0 eV.

Electroluminescent device with improved hole transport layer

Electroluminescent devices having naphthylanthracene-based polymers

Growing community of inventors

Webster, NY, United States of America

Jianmin Shi