Provided is an organic light emitting element including: an anode; a cathode; and an organic compound layer formed between the anode and the cathode and including a hole injection layer, a hole transport layer, and an emission layer, in which: the emission layer includes a host and a dopant; the hole transport layer includes a hole transport material having multiple aromatic hydrocarbon skeletons and a single bond for linking the aromatic hydrocarbon skeletons; the hole transport material has a triplet level T.sub.1 of 1.8 eV or more; the hole transport material has a hole mobility of 110.sup.5 cm.sup.2/Vs or more; and the hole transport layer and the emission layer satisfy relationships represented by the following expression (1):
|reduction potential of hole transport material||reduction potential of host|>0.1 V(1)
and the following expression (2):
|HOMO level of hole transport materialHOMO level of host|<0.1 eV(2).

A light-emitting device with high efficiency and high reliability. The light-emitting device includes an organic compound layer between a first electrode and a second electrode. The organic compound layer includes a first light-emitting unit, a second light-emitting unit, and an intermediate layer. The intermediate layer is positioned between the first light-emitting unit and the second light-emitting unit. The intermediate layer includes an organic compound. A peak current of electron oxidation is detected and a peak current of electron reduction is not detected in the case where the organic compound is measured by CV at a scan rate greater than or equal to 1 V/s and less than or equal to 100 V/s.

The present invention relates to an electronic device comprising at least one light emitting layer between an anode and a substantially silver cathode, the device further comprising between the cathode and the anode at least one mixed layer comprising (i) at least one substantially covalent electron transport matrix compound comprising at least one polar group selected from phosphine oxide group or diazole group, and (ii) in substantially elemental form, an electropositive element selected from substantially non-radioactive alkali metals, alkaline earth metals, rare earth metals, and transition metals of the fourth period of the Periodic table having proton numbers 22, 23, 24, 25, 26, 27, 28, 29.

The present invention relates to an organic semiconducting material and to an electronic device comprising the semiconducting material, particularly to an electroluminescent device, particularly to an organic light emitting diode (OLED), wherein the semiconducting material comprises a first electron transport matrix compound and an electrical n-dopant; the invention pertains also to a device comprising the electric device and/or the electroluminescent device, particularly to a display device, particularly to a display device comprising the OLED.

The present invention relates to an organic electroluminescent device, particularly to an organic light emitting diode (OLED) including an ETL stack of at least two electron transport layers, wherein the first electron transport layer comprises a first electron transport matrix compound and the second electron transport layer comprises second electron transport matrix compound and a redox n-dopant, and a device comprising the OLED.

The present invention relates to a conjugated polymer compound for a polymer solar cell donor represented by the following chemical formula 1 and a polymer solar cell comprising same:

##STR00001## (in chemical formula 1 above, n is an integer greater than or equal to 2, Ar.sub.1 and Ar.sub.2 are each independently substituted or unsubstituted thienylene, substituted or unsubstituted thieno[3,2-b]thiophene, or a bond, R.sub.1 is substituted or unsubstituted 2-thienyl or substituted or unsubstituted phenyl, R.sub.2 is hydrogen or fluorine, and R.sub.3 is 2-ethylhexyl).

An organic electroluminescence element in which a compound represented by the general formula below is used in a light-emitting layer exhibits a high emission efficiency and is inexpensive to provide. At least one of R.sup.1 to R.sup.8 and R.sup.17 represent an electron-donating group and the others represent a hydrogen atom; at least one of R.sup.9 to R.sup.16 represent an electron-withdrawing group that does not have an unshared electron pair at the -position thereof and the others represent a hydrogen atom; Z represents a single bond or >CY; Y represents O, S, C(CN).sub.2 or C(COOH).sub.2; provided that when Z is a single bond, then at least one of R.sup.9 to R.sup.16 is an electron-withdrawing group that does not have an unshared electron pair at the -position thereof. ##STR00001##

To provide a novel organic compound suitable for an organic light emitting device. This invention provides an organic compound having the skeleton represented by Formula (1).

##STR00001##

To provide a novel organic compound suitable for an organic light emitting device. This invention provides an organic compound having the skeleton represented by Formula (1). ##STR00001##

An organic light-emitting device includes a positive electrode, a negative electrode and at least one organic material layer between the positive electrode and the negative electrode. The at least one organic material layer includes a hole-injecting layer, a hole-transporting layer, an emission layer, an electron-transporting layer, and an electron-injecting layer, and the emission layer includes a host material and a dopant material. In addition, a lifetime enhancement layer including a bipolar compound is positioned between the emission layer and the electron-transporting layer.