Abstract: A patterning method, comprising: disposing a nanoparticle composition on a support material, the disposing being performed such that the nanoparticle composition defines a patterned region having an average inter-nanoparticle distance of less than about 5 nm; and selectively etching the support material so as to give rise to in the support material a plurality of arrayed structures substantially in register with the patterned region of the nanoparticle composition. An article, comprising an article made according to the present disclosure. A workpiece, comprising: an etchable support material; and a nanoparticle composition, the nanoparticle composition being disposed on the support material as a monolayer, the nanoparticle composition defining a patterned region having an average inter-nanoparticle distance of less than about 5 nm, and nanoparticles of the nanoparticle composition having ligands disposed thereon.

Abstract: A method for engineering a line shape of emission spectrum of an organic emissive material in an electroluminescent device is disclosed in which a layer of plasmonic metallic nanostructures having a localized surface plasmonic resonance (LSPR) is provided in proximity to the emissive layer and the layer of plasmonic metallic nanostructures is greater than 2 nm but less than 100 nm from the emissive layer and the LSPR of the plasmonic metallic nanostructures matches the emission wavelength of the organic emissive material. An electroluminescent device incorporating the plasmonic metallic nanostructures is also disclosed.

Abstract: A method for engineering a line shape of emission spectrum of an organic emissive material in an electroluminescent device is disclosed in which a layer of plasmonic metallic nanostructures having a localized surface plasmonic resonance (LSPR) is provided in proximity to the emissive layer and the layer of plasmonic metallic nanostructures is greater than 2 nm but less than 100 nm from the emissive layer and the LSPR of the plasmonic metallic nanostructures matches the emission wavelength of the organic emissive material. An electroluminescent device incorporating the plasmonic metallic nanostructures is also disclosed.

Abstract: The present disclosure relates to a hybrid nanoparticle comprising: (a) a metallic core or a metal oxide core, and (b) at least one dendron attached to the surface of the metallic core or metal oxide core, wherein the at least one dendron is derived from a compound complying with formula (I) or (II), which is described herein, as well as films containing such hybrid nanoparticles. Also described are compounds complying with formula (I) or (II) and their use in forming the hybrid nanoparticles of the present disclosure.

Abstract: Methods of forming colloidal nanocrystal (NC)-based thin film devicesare disclosed. The methods include the steps of depositing a dispersion of NCs on a substrate to form a NC thin-film, wherein at least a portion of the NCs is capped with chalcogenocyanate (xCN)-based ligands; and doping the NC thin-film with a metal.

Abstract: Methods of preparing a dispersion of colloidal nanocrystals (NCs) for use as NC thin films are disclosed. A dispersion of NCs capped with ligands may be mixed with a solution containing chalcogenocyanate (xCN)-based ligands. The mixture may be separated into a supernatant and a flocculate. The flocculate may be dispersed with a solvent to form a subsequent dispersion of NCs capped with xCN-based ligands.

Abstract: A method for engineering a line shape of emission spectrum of an organic emissive material in an electroluminescent device is disclosed in which a layer of plasmonic metallic nanostructures having a localized surface plasmonic resonance (LSPR) is provided in proximity to the emissive layer and the layer of plasmonic metallic nanostructures is greater than 2 nm but less than 100 nm from the emissive layer and the LSPR of the plasmonic metallic nanostructures matches the emission wavelength of the organic emissive material. An electroluminescent device incorporating the plasmonic metallic nanostructures is also disclosed.

Abstract: A compound including a ligand L according to Formula I: as well as, a first device and a formulation containing the same, are disclosed. In the compound including the Ligand L of Formula I: R1 and R2 are independently selected from group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, cyano, and combinations thereof; two adjacent substituents of R1 or R2 are optionally joined to form a fused ring; ligand L is coordinated to transition metal M having an atomic number greater than 40; R1 represent mono, di, tri, or tetra-substitution, or no substitution; R2 represent mono, di, or tri-substitution, or no substitution; and at least one substituent of R1 or R2 is cyano.

Abstract: Methods of forming colloidal nanocrystal (NC)-based thin film devicesare disclosed. The methods include the steps of depositing a dispersion of NCs on a substrate to form a NC thin-film, wherein at least a portion of the NCs is capped with chalcogenocyanate (xCN)-based ligands; and doping the NC thin-film with a metal.

Abstract: Methods of preparing a dispersion of colloidal nanocrystals (NCs) for use as NC thin films are disclosed. A dispersion of NCs capped with ligands may be mixed with a solution containing chalcogenocyanate (xCN)-based ligands. The mixture may be separated into a supernatant and a flocculate. The flocculate may be dispersed with a solvent to form a subsequent dispersion of NCs capped with xCN-based ligands.

Abstract: A first device comprising a first organic light emitting device (OLED) is described. The first OLED includes an anode, a cathode and an emissive layer disposed between the anode and the cathode. The emissive layer includes a phosphorescent emissive dopant and a host material, that includes nanocrystals. The phosphorescent emissive dopant is bonded to the host material by a bridge moiety.

Abstract: Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion.

Abstract: A compound including a ligand L according to Formula I: as well as, a first device and a formulation containing the same, are disclosed. In the compound including the Ligand L of Formula I: R1 and R2 are independently selected from group consisting of hydrogen, deuterium, halide, alkyl, cycloalkyl, heteroalkyl, arylalkyl, alkoxy, aryloxy, amino, silyl, alkenyl, cycloalkenyl, heteroalkenyl, alkynyl, aryl, heteroaryl, acyl, carbonyl, carboxylic acids, ester, nitrile, isonitrile, sulfanyl, sulfinyl, sulfonyl, phosphino, cyano, and combinations thereof; two adjacent substituents of R1 or R2 are optionally joined to form a fused ring; ligand L is coordinated to transition metal M having an atomic number greater than 40; R1 represent mono, di, tri, or tetra-substitution, or no substitution; R2 represent mono, di, or tri-substitution, or no substitution; and at least one substituent of R1 or R2 is cyano.

Abstract: One-dimensional materials are prepared from an array of nanoparticles positioned in one or more recesses of a substrate, wherein the recesses and the positioned nanoparticles have a comparable diameter of the same order of magnitude such that one nanoparticle is positioned within each of the one or more recesses; wherein a depth of the one or more recesses is from 10 nm to 40 nm; and wherein a diameter of the one or more recesses is adjusted by conformal film deposition and is between one and two times the mean diameter of the nanoparticles, and wherein the nanoparticles have a mean diameter of from 1 nm to 50 nm, and wherein the nanoparticles are catalytic sites for the growth of the one-dimensional materials; wherein the one dimensional materials are non-aggregated and extend in a direction that is perpendicular or approximately perpendicular to the horizontal surface of the substrate.

Abstract: A first device comprising a first organic light emitting device (OLED) is described. The first OLED includes an anode, a cathode, and an emissive layer disposed between the anode and the cathode. The emissive layer includes a phosphorescent emissive dopant and a host material. The host material includes inorganic nanocrystals where (i) at least 50% of ligands bonded to said nanocrystals are compact ligands, (ii) an average interparticle distance between adjacent nanoparticles is ?1 nm, or (iii) both. Also described are a method of making the emissive layer and a composition that includes the phosphorescent emissive dopant with the host materials that include the electronically-coupled inorganic nanocrystal host material.

Abstract: Methods of exchanging ligands to form colloidal nanocrystals (NCs) with chalcogenocyanate (xCN)-based ligands and apparatuses using the same are disclosed. The ligands may be exchanged by assembling NCs into a thin film and immersing the thin film in a solution containing xCN-based ligands. The ligands may also be exchanged by mixing a xCN-based solution with a dispersion of NCs, flocculating the mixture, centrifuging the mixture, discarding the supernatant, adding a solvent to the pellet, and dispersing the solvent and pellet to form dispersed NCs with exchanged xCN-ligands. The NCs with xCN-based ligands may be used to form thin film devices and/or other electronic, optoelectronic, and photonic devices. Devices comprising nanocrystal-based thin films and methods for forming such devices are also disclosed. These devices may be constructed by depositing NCs on to a substrate to form an NC thin film and then doping the thin film by evaporation and thermal diffusion.

Abstract: The invention is directed to a method of positioning nanoparticles on a patterned substrate. The method comprises providing a patterned substrate with selectively positioned recesses, and applying a solution or suspension of nanoparticles to the patterned substrate to form a wetted substrate. A wiper member is dragged across the surface of the wetted substrate to remove a portion of the applied nanoparticles from the wetted substrate, and leaving a substantial number of the remaining portion of the applied nanoparticles disposed in the selectively positioned recesses of the substrate. The invention is also directed to a method of making carbon nanotubes from the positioned nanoparticles.

Abstract: The invention is directed to a method of positioning nanoparticles on a patterned substrate. The method comprises providing a patterned substrate with selectively positioned recesses, and applying a solution or suspension of nanoparticles to the patterned substrate to form a wetted substrate. A wiper member is dragged across the surface of the wetted substrate to remove a portion of the applied nanoparticles from the wetted substrate, and leaving a substantial number of the remaining portion of the applied nanoparticles disposed in the selectively positioned recesses of the substrate. The invention is also directed to a method of making carbon nanotubes from the positioned nanoparticles.