Provided are iridium complexes having a ligand L.sub.A of Formula I

##STR00001##

Also provided are formulations comprising these iridium complexes. Further provided are OLEDs and related consumer products that utilize these iridium complexes.

The present invention relates to a metal iridium complex and application thereof. The metal iridium complex has a structure as shown in the following formula (I). The compound provided in the present invention has the advantages of low sublimation temperature, great optical and electrical stability, high luminescence efficiency, long service life, and high color saturation, and can be used in organic light-emitting devices. In particular, the complex has the potential for application in the AMOLED industry as a red light-emitting phosphorescent material.

##STR00001##

Provided is an organometallic complex represented by general formula (1) below.

##STR00001##

In formula (1), X.sub.1 to X.sub.3 are each independently selected from a carbon atom and a nitrogen atom, and at least one of X.sub.1 to X.sub.3 is a nitrogen atom. The carbon atom has a hydrogen atom or a substituent. Y is an aryl group or a heterocyclic group. L is a bidentate ligand. When a plurality of L's are present, the plurality of L's may be the same or different. M is a metal atom selected from Ir, Pt, Rh, Os, and Zn. m represents an integer of 1 to 3, and n represents an integer of 0 to 2. R.sub.1 to R.sub.5 each represent a hydrogen atom or a substituent.

A display apparatus that includes an OLED (organic light-emitting device) substrate including a first blue light-emitting unit, a green light-emitting unit, and a second blue light-emitting unit which are stacked; and a color controller provided on the OLED substrate to adjust color of a light generated from the OLED substrate.

Provided is a heterocyclic compound of Chemical Formula 1: ##STR00001##
and an organic light emitting device including the same.

A novel display apparatus that is highly convenient, useful, or reliable is provided. The display apparatus includes a first electrode, a second electrode, a first unit, a second unit, and a first intermediate layer; the first unit is located between the second electrode and the first electrode; and the first unit contains a first light-emitting material EM1. The second unit is located between the second electrode and the first unit and contains a second light-emitting material EM2. The first intermediate layer is located between the second unit and the first unit. The first intermediate layer includes a first layer and a second layer; the first layer is located between the second unit and the second layer; the first layer contains an organic compound having a halogen group or a cyano group or a transition metal oxide; and the second layer contains a first organic compound AM2 having an electron-accepting property, a second organic compound DM having an electron-donating property, and a third organic compound BM having basicity.

Provided is a process for preparation of a compound of Formula 1 ##STR00001##
where, ring Y and ring Z are each independently a 5-membered or 6-membered carbocyclic or heterocyclic ring; Z.sup.1 and Z.sup.2 are each independently C or N; each R.sup.Y and R.sup.Z independently represents mono to the maximum possible number of substitutions, or no substitution; x=1, 2, or 3; y=0, 1, or 2; and x+y=3. Disclosed is a chemical synthesis process that involves contacting a compound of Formula 2 ##STR00002##
with a compound of Formula 3 ##STR00003##
in an organic solvent to yield a compound of Formula 1 ##STR00004##

This invention discloses oligosilane compounds. These compounds can be used in OLEDs.

A compound containing indolocarbazole having a formula: ##STR00001##
Formula I is disclosed.

Specific polycyclic compounds of the general formula (I) and a process for its preparation, an electronic device comprising at least one of these compounds, an emitting layer, preferably present in an electronic device, comprising at least one compound of general formula (I) and the use of compounds according to general formula (I) in an electronic device as a host material, a charge transporting material, charge and/or exciton blocking material, preferably as a host material or an electron transporting material. ##STR00001##