An organic electroluminescence device, comprising a cathode, an anode, and at least one emitting layer disposed between the cathode and the anode, wherein the emitting layer contains a first host material, a second host material, and a dopant material, wherein the first host material is a compound represented by the following formula (1), the second host material is a compound represented by the following formula (2), and one or more selected from the group consisting of the compound represented by the formula (1) and the compound represented by the formula (2) have at least one deuterium atom.

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Provided are an organic light emitting device and a display apparatus. An organic light emitting device, including an anode, a cathode, and an emitting layer disposed between the anode and the cathode; wherein a hole transport layer and an electron blocking layer are disposed between the anode and the emitting layer; the hole transport layer and the electron blocking layer satisfy:

|HOMO.sub.HTL−HOMO.sub.EBL|≤0.2 eV wherein HOMO.sub.HTL is a highest occupied molecular orbital, HOMO energy level of the hole transport layer and HOMO.sub.EBL is a HOMO energy level of the electron blocking layer.

Provided are a condensed cyclic compound, a light-emitting device including the same, and an electronic apparatus including the light-emitting device. The light-emitting device includes a first electrode, a second electrode facing the first electrode, an interlayer disposed between the first electrode and the second electrode and including an emission layer, and at least one condensed cyclic compound, which is represented by Formula 1, which is defined in the specification:

##STR00001##

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including an emission layer, wherein the first electrode includes a metal oxide having a work function value of about −5.3 eV or less, and the interlayer includes a layer including a compound of Formula 1:

##STR00001##

wherein, in Formula 1, the variables are described herein.

The present disclosure relates to organometallic compounds and formulations and their various uses including as hosts or emitters in devices such as organic light emitting diodes and related electronic devices. In particular, the present disclosure provides are compounds having the structure of Formula I as defined herein. Also provided are formulations comprising these compounds. Further provided are OLEDs and related consumer products that utilize these compounds.

A condensed cyclic compound represented by Formula 1: ##STR00001## wherein in Formula 1, Ar.sub.1 and R.sub.1 to R.sub.8 are the same as described in the specification.

A composition may include a compound, a film may include the composition, an organic layer of an organic sensor and/or photoelectric diode may include the compound, and the film, organic sensor, and/or photoelectric diode may be included in an electronic device.

An organic light-emitting device includes a condensed cyclic compound represented by Formula 1, where at least one of X.sub.4 to X.sub.11 is C(R.sub.x), and R.sub.x is a group represented by Formula 2: ##STR00001## The condensed cyclic compound represented by Formula 1 has a planar conformation because of the single bond linking the 8 and 8′ positions of the spirobifluorene moiety. Accordingly, the condensed cyclic compound may provide the organic light-emitting device with suitable hole mobility and thermal stability.

Discussed is an organic compound of Formula 1 and an organic light emitting diode and an OLED device including the organic compound. In the organic compound, Ar1 is a heteroaryl group comprising a nitrogen atom, and Ar2 is a C.sub.6 to C.sub.30 aryl group, and R is a C.sub.1 to C.sub.10 alkyl group. The organic compound may be included in an emitting material layer of the organic light emitting diode as a host such that an emitting efficiency and a lifespan of the organic light emitting diode and the OLED device are improved. ##STR00001##

The present application relates to an electronic device, to the use thereof, and to a process for production thereof.