A dual host system for OLEDs that contains hole-transporting indolocarbazole and electron-transporting indolocarbazole exhibiting superior performance in the OLEDs is disclosed.

The present invention relates to an organic electroluminescent device including at least one light-emitting layer B composed of one or more sublayers, wherein the one or more sublayers of the light-emitting layer B include at least one host material H.sup.B, at least one phosphorescence material P.sup.B, at least one small FWHM emitter S.sup.B, and optionally at least one TADF material E.sup.B, wherein S.sup.B emits light with a full width at half maximum (FWHM) of less than or equal to 0.25 eV.

A compound of Ir(L.sub.A).sub.m(L.sub.B).sub.3-m, having a structure of Formula I,

##STR00001##

is provided. In Formula I, moieties A and B are each either a monocyclic ring or a polycyclic fused ring system; X.sup.1 to X.sup.4 and Z.sup.1 to Z.sup.4 are C or N; Y is a single atom linker, which can be substituted; each R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 is hydrogen or a General Substituent; m is 1 or 2; at least one of R.sup.1, R.sup.2, and R.sup.3 comprises at least one first electron-withdrawing group; and at least one of R.sup.4 and R.sup.5 comprises at least one second electron-withdrawing group. Formulations, OLEDs, and consumer products containing the compound are also provided.

A compound of Formula I: ##STR00001## wherein each R.sup.1, R.sup.2, R.sup.3, and R.sup.4 is independently hydrogen or a substituent selected from the group consisting of deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, carbonyl, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, boryl, and combinations thereof; and wherein any two adjacent substituents are optionally joined or fused together to form a ring.

High performance OLED that includes deuterated compounds in the emissive layer are disclosed. The OLED includes an anode; a cathode; and an emissive layer, disposed between the anode and the cathode. In the OLED, the emissive layer includes a first phosphorescent emitter and a first host; the first phosphorescent emitter is a metal complex; the first host is partially or fully deuterated; and at least one additional condition is true.

The present disclosure provides a method for patterning a nanoparticle layer, including steps of: (S1) connecting a first base to a surface of a predetermined area of a substrate, to form a substrate modified with the first base in the predetermined area of the substrate; (S2) depositing the nanoparticle in the predetermined area of the substrate, to form a nanoparticle layer in the predetermined area of the substrate by self-assembling, a ligand of the nanoparticle includes a second base, and the first base and the second base being connected by a hydrogen bond; and (S3) removing the nanoparticle in a non-predetermined area of the substrate.

The present invention relates to organic electroluminescent devices including one or more light-emitting layers, each of which is composed of one or more sublayers including as a whole one or more excitation energy transfer components EET-1, one or more hole scavengers H.sub.scav, one or more small full width at half maximum (FWHM) emitters S.sup.B emitting light with an FWHM of less than or equal to 0.25 eV. Furthermore, the present invention relates to a method for generating light by means of an organic electroluminescent device according to the present invention.

The present invention relates to organic electroluminescent devices including a light-emitting layers B including a TADF material, a small full width at half maximum (FWHM) emitter S.sup.B emitting blue light with an FWHM of less than or equal to 0.25 eV, and a host material H.sup.B, and an optional excitation energy transfer component EET-2. Furthermore, the present invention relates to a method for generating blue light by means of an organic electroluminescent device according to the present invention.

The present invention relates to a an organic electroluminescent device including at least one light-emitting layer B composed of one or more sublayers, wherein the one or more sublayers of the light-emitting layer B as a whole include at least one host material H.sup.B, at least one phosphorescence material P.sup.B, at least one small FWHM emitter S.sup.B, and optionally at least one TADF material E.sup.B, wherein S.sup.B emits light with a full width at half maximum (FWHM) of less than or equal to 0.25 eV.

Provided are a light-emitting device and an electronic apparatus including the same, the light-emitting device including a first electrode, a second electrode, and an interlayer arranged between the first electrode and the second electrode and including an emission layer, wherein the emission layer includes a first compound represented by Formula 1 and a second compound represented by Formula 2:

##STR00001## wherein details of Formulae 1 and 2 are as described herein.