Provided is a compound comprising a structure of

##STR00001##

wherein the variables are defined herein.

Organic photovoltaic devices with compound charge transport layers are described herein. One such device includes a substrate, a first electrode coupled to the substrate, a second electrode disposed above the first electrode, and photoactive layers disposed between the first electrode and the second electrode. The device further includes a compound charge transport layer disposed between the photoactive layers and either the first electrode or the second electrode. The compound charge transport layer includes a charge transport layer and a metal-oxide interlayer disposed between the charge transport layer and the photoactive layers. The charge transport layer may be a hole transport layer or an electron transport layer.

The present invention relates to an organic electronic device, comprising a first electrode, a second electrode, and a substantially organic layer comprising a compound according to formula (I) between the first and the second electrode:

##STR00001##

wherein M is a metal ion, each of A.sup.1-A.sup.4 is independently selected from H, substituted or unsubstituted C6-C20 aryl and substituted or unsubstituted C2-C20 heteroaryl and n is valency of the metal ion.

The invention relates to the field of measuring equipment, and more particularly, to gas analysis sensors/chemical sensors designed to analyze the composition of gas mixtures and to detect and quantify toxic chemical gaseous compounds in an environment. The gas multisensor includes an array of N organic field-effect transistors, each of which consist of at least a source electrode and a drain electrode separated by an organic semiconductor layer, a gate electrode, a dielectric layer, and an additional receptor layer based on a metalloporphyrin of general formula 1 or 2 and completely or partially covering the organic semiconductor layer, while a metal ion M of metalloporphyrin is a transition metal, and each of the N organic field-effect transistors contained in the array differs from the other organic field- effect transistors in the array by the chemical structure of the receptor layer. The technical result is lowering the limit of detection of an electronic nose device based on chemosensors.

##STR00001##

Provided are 2-coordinate metal complexes compounds as sensitizers of fluorophores. Also provided are formulations comprising these 2-coordinate metal complexes compounds. Further provided are OLEDs and related consumer products that utilize these 2-coordinate metal complexes compounds. The OLED includes an emissive region that contains a first compound that is a sensitizer having a structure of Formula I:

##STR00001##

and an acceptor.

An OLED device structure, an OLED display panel and a display device are provided. The OLED device structure includes: a first electrode; a self-assembled layer, disposed on the first electrode; a first transportation layer, disposed on the self-assembled layer; a light-emitting layer, disposed on the first transportation layer; a second transportation layer, disposed on the light-emitting layer; and a second electrode, disposed on the second transportation layer. The OLED display panel and the display device each include the OLED device structure. By setting a self-oriented self-assembled layer in the OLED device structure and selecting specific materials, advantages can be achieved as follows: an injection efficiency of hole is improved, a driving voltage is reduced, mobilities of electron and hole are increased, a luminous efficiency is increased, an external light coupling efficiency is increased, a light extraction rate is increased, and an external quantum efficiency is improved.

An organic light-emitting device including a first electrode, a second electrode, and an organic layer between the first and the second electrode, wherein the organic layer includes an emission layer, and the emission layer includes a first compound as a hole transport compound, a second compound as an electron transport compound, and a third compound represented by Formula 1:

##STR00001##

wherein in Formula 1, M is a transition metal, and at least one selected from A.sub.1 and A.sub.2 includes at least one deuterium.

Provided are an organometallic compound of Formula 1, an organic light-emitting device including the organometallic compound, and a diagnostic composition including the organometallic compound.

##STR00001##

In Formula 1, ring A.sub.1, ring A.sub.3, and ring A.sub.4 are each independently a C.sub.5-C.sub.30 carbocyclic group or a C.sub.2-C.sub.60 heterocyclic group, and ring A.sub.2 is an N-containing 5-membered heterocyclic group.

Provided are novel C.sub.3-symmetry high T.sub.1 energy host compounds. Also provided are formulations comprising these novel C.sub.3-symmetry high T.sub.1 energy host compounds. Further provided are OLEDs and related consumer products that utilize these novel C.sub.3-symmetry high T.sub.1 energy host compounds. The novel host compounds are represented by Formula I

##STR00001##

where the variables are defined herein.

Metal complexes that exhibit multiple radiative decay mechanisms, together with methods for the preparation and use thereof.