An organic vapor jet printing (OVJP) device is provided that includes an OVJP print die having one or more delivery channels to deliver organic material and carrier gas to a region below the print die and one or more exhaust channels to remove material from below the print die. A directly-heated delivery line connected to the one or more delivery channels and a source of the organic material external to the OVJP print die includes a resistive material and a plurality of electrical connections to the resistive material. When a current is applied to the resistive material via the plurality of electrical connections, the resistive material heats the interior of the directly-heated delivery line.

An organic light-emitting display device includes: a substrate; a pixel electrode on the substrate; a pixel defining layer having a first opening exposing a center portion of the pixel electrode; a barrier layer on the pixel defining layer; an intermediate layer including a first common layer, a first emissive layer, and a second common layer sequentially arranged on the pixel electrode, the pixel defining layer, and the barrier layer; and a first opposite electrode covering the intermediate layer. The barrier layer has a second opening that is larger than the first opening and has an undercut structure.

A display apparatus may include a substrate including a display area and a sensor area, the display area including a main pixel, and the sensor area including an auxiliary pixel and a transmission area, a first pixel electrode and a light-emitting layer each in the main pixel, a second pixel electrode and a second light-emitting layer each in the auxiliary pixel, an opposite electrode integrally arranged in the display area and the sensor area, and defining an opening corresponding to the transmission area, and an organic pattern layer surrounding at least a part of the transmission area.

The disclosure provides a method of manufacturing an encapsulation layer and a display substrate. The method of manufacturing the encapsulation layer includes: forming a strippable layer on a first region of a substrate; forming an organic material layer on a second region of the substrate, the organic material layer comprising a portion covering the second region and an overflow portion exceeding the second region and at least partially covering the first region, wherein the first region and the second region are adjoined to each other; and stripping the strippable layer from the substrate to remove the overflow portion of the organic material layer and form an organic encapsulation layer.

An organic photovoltaic device comprises a substrate, a reflector positioned over the substrate, a first electrode positioned over at least a first portion of the reflector, a polaritonic antenna layer positioned over a second portion of the reflector different from the first portion, electrically connected to the first electrode, and at least one unit reaction cell positioned over at least part of the first electrode, the at least one unit reaction cell comprising a heterojunction layer comprising a donor material and an acceptor material, positioned over the first electrode, and a second electrode positioned over the heterojunction, wherein the polaritonic antenna and the reflector are configured to convert incoming photonic energy to polaritons. A method of fabricating an organic photovoltaic device is also disclosed.

An organic light-emitting display apparatus including: a substrate; a pixel electrode located on the substrate; a pixel-defining film covering an end portion of the pixel electrode; an intermediate layer located on the pixel electrode and including an emission layer; a counter electrode located on the intermediate layer; a passivation layer located on the counter electrode and including a cover portion covering a top surface of the counter electrode and a protrusion extending from an end portion of the cover portion away from the substrate; and an encapsulation member covering the passivation layer.

A method of forming a pattern part includes forming a first film on a target object, the first film having a first cure shrinkage ratio, forming a second film on the first film, the second film having a second cure shrinkage ratio greater than the first cure shrinkage ratio, and patterning the first film and the second film to form a pattern.

Disclosed are a quantum dot light emitting device and a manufacturing method thereof as well as a display apparatus. The quantum dot light emitting device includes: a substrate; a pixel definition layer, wherein the pixel definition layer includes a plurality of pixel openings and pixel partition bodies, and a surface of each pixel partition body has a hydroxide radical; a quantum dot layer, located in the pixel openings; and a polymer structure sealing the quantum dot layer in the pixel openings, wherein the polymer structure is a of fully enclosed structure at least formed by polymerization of siloxane, thiol siloxane and the hydroxide radical, the siloxane, the hydroxide radical and the thiol siloxane are all polymerized, and a sulfur atom of a thiol in the thiol siloxane is combined with a coordinating atom of the quantum dot layer.

A display device includes: a circuit element layer comprising a transistor; a display element layer comprising a first electrode connected to the transistor, a second electrode facing the first electrode, an organic pattern between the first electrode and the second electrode, a pixel defining layer having an opening exposing the first electrode, an auxiliary electrode spaced apart from the opening to cover a portion of the pixel defining layer and connected to the second electrode, a first protection pattern covering the second electrode, and a second protection pattern covering the first protection pattern; and an encapsulation layer covering the display element layer, wherein the first protection pattern and the second protection pattern have stress in directions different from each other.

A manufacturing method of a patterned quantum dot light-emitting layer includes: forming a sacrificial layer on a side of a base substrate, wherein the sacrificial layer includes a first component and a second component mixed in the first component; forming a patterned photoresist layer on a side of the sacrificial layer facing away from the base substrate; etching the sacrificial layer by taking the patterned photoresist layer as a mask to form a patterned sacrificial layer; forming a quantum dot film layer on a side of the photoresist layer facing away from the sacrificial layer; making the second component decompose under the preset condition to produce the bubbles, to make the first component form the porous structure; and forming the patterned quantum dot light-emitting layer by removing the photoresist layer, the sacrificial layer and the quantum dot film layer attached to the sacrificial layer, by dissolution via a solvent.