Abstract: A light-emitting apparatus having an improved charge transport layer is disclosed. The apparatus may include a substrate and a first electrode layer disposed on the substrate. The apparatus may further include an emissive layer including quantum dots soluble in a first solvent having a first polarity, where the emissive layer may be in electrical contact with the first electrode layer and the second electrode layer. The apparatus may further include a hole transport layer between the emissive layer and first electrode layer and an electron transport layer between the emissive layer and the second electrode layer. The electron transport layer may include metal-oxide nanoparticles. The metal-oxide nanoparticles may be soluble in a second solvent having a second polarity lower than the first polarity.

Abstract: A quantum dot light-emitting apparatus includes a substrate, with a first electrode layer located on the substrate. An emissive layer having a first set of quantum dots is electrically coupled with the first electrode layer, and a second electrode layer is also electrically coupled with the emissive layer. The second electrode layer is located opposite the first electrode layer, relative to the emissive layer. A first charge transport layer is placed between the emissive layer and the first electrode layer, and a second charge transport layer is placed between the emissive layer and the second electrode layer. At least one of the first charge transport layer and the second charge transport layer includes a second set of quantum dots.

Abstract: A light emitting device comprises a first electrode, a second electrode, and an emissive layer (EML) between the first electrode and the second electrode and electrically connected to the first electrode and the second electrode. The EML comprises a charge transport matrix of a first polarity, a plurality of quantum dots in the charge transport matrix, and a plurality of charge transport nanoparticles of a second polarity in the charge transport matrix.

Abstract: A quantum dot light-emitting apparatus includes a substrate, with a first electrode layer located on the substrate. An emissive layer having a first set of quantum dots is electrically coupled with the first electrode layer, and a second electrode layer is also electrically coupled with the emissive layer. The second electrode layer is located opposite the first electrode layer, relative to the emissive layer. A first charge transport layer is placed between the emissive layer and the first electrode layer, and a second charge transport layer is placed between the emissive layer and the second electrode layer. At least one of the first charge transport layer and the second charge transport layer includes a second set of quantum dots.

Abstract: A sub-pixel array device includes a plurality of optoelectronic devices disposed on a substrate, the plurality of optoelectronic devices including a light-emitting device and a light-converting device, and a bank structure that separates adjacent optoelectronic devices. Each optoelectronic device includes a first electrode, a second electrode, an active layer disposed between the electrodes and including a solution processable semiconductor, and a photo-crosslinkable material disposed between the first electrode and the second electrode. The photo-crosslinkable material may be incorporated within the active layer of each of the plurality of optoelectronic devices, so as to form a light-emitting device having a photo-crosslinkable emissive layer and a light-converting device having a photo-crosslinkable photo-active layer.

Abstract: A light emitting device comprises a first electrode, a second electrode, and an emissive layer (EML) between the first electrode and the second electrode and electrically connected to the first electrode and the second electrode. The EML comprises a charge transport matrix of a first polarity, a plurality of quantum dots in the charge transport matrix, and a plurality of charge transport nanoparticles of a second polarity in the charge transport matrix.

Abstract: A light emitting device includes a sub-pixel region with a sub-pixel stack having a first electrode, second electrode, emissive layer between the first electrode and second electrode, a first charge transporting layer between the emissive layer and the first electrode, and a second charge transporting layer between the emissive layer and the second electrode. A bank in a bank region surrounds the sub-pixel stack. One of the first charge transporting or injecting layer and the second charge transporting or injecting layer is formed in the sub-pixel region and the bank region, and an electrical resistance of the first charge transporting layer and the second charge transporting layer in the bank region is higher than the sub-pixel region.

Abstract: A light emitting device comprises a first electrode, a second electrode, and an emissive layer between the first and the second electrodes. The emissive layer comprises a first plurality of quantum dots having hole transporting ligands, and a second plurality of quantum dots having electron transporting ligands, where at least one of the first and the second plurality of quantum dots is incorporated in a matrix. The matrix comprises at least one of an electrically insulating material, a photo-responsive material, and a dielectric material. The matrix comprises cross-linked molecules, the cross-linked molecules transport charge carriers to or away from the at least one of the first plurality of quantum dots and the second plurality of quantum dots that is incorporated in the matrix.