Abstract: Provided are a method for preparing a pixel defining layer comprising applying and coating, pre-baking, exposing to light, developing, and post-baking of a photosensitive composition containing a colorant having a pigment with an average particle size of 100 nm or less, wherein the coated film generated after the post-baking has an optical density of 0.8/?m to 2.0/?m, a roughness of 3.0 nm or less, and no residue; and an organic light emitting display device comprising the pixel defining layer obtained by the method which has improved display reliability and lifetime as well as vivid colors.

Abstract: An object of the present disclosure is to improve display reliability and lifetime as well as vivid colors. When there remain residues in the washing part due to incomplete removal during the developing step, it can cause dark spots or pixel off due to the residues, and thus residue-free pixels can be formed by optimizing the temperature and time for developing. Additionally, when the amount of outgas in the panel after post-baking is 15 ppm or more, it may cause a reduction in luminance and lifetime due to pixel shrinkage. Therefore, in order to minimize the amount of outgas after completion of the post-baking process, the generation of outgas in the panel state can be minimized by generating sufficient fume in the post-baking step, in addition to forming clean pixels in the developing step.

Abstract: An anode active material for a lithium secondary battery, the anode active material including a metal silicide core, a silicon shell disposed on the core, and a metal nitride disposed on a surface of the silicon shell opposite the core.

Abstract: An anode active material for a lithium secondary battery, the anode active material including a metal silicide core, a silicon shell disposed on the core, and a metal nitride disposed on a surface of the silicon shell opposite the core.

Abstract: An anode active material for a lithium secondary battery, the anode active material including a metal silicide core, a silicon shell disposed on the core, and a metal nitride disposed on a surface of the silicon shell opposite the core.

Abstract: An anode active material for a lithium secondary battery, the anode active material including a metal silicide core, a silicon shell disposed on the core, and a metal nitride disposed on a surface of the silicon shell opposite the core.

Abstract: A solar cell and method of manufacturing the same includes a semiconductor substrate having a textured surface and including a plurality of recess portions and a plurality of flat portions, an emitter layer in the plurality of recess portions, a first doping region in at least one of the plurality of flat portions, and doped with a first conductive type impurity selected from one of p-type and n-type impurities, a second doping region in at least one of the plurality of flat portions, and doped with a second conductive type impurity selected from one of p-type and n-type impurities that differs from the first conductive type impurity, and first and second electrodes electrically connected to the first and second doping regions, respectively. The distance between the emitter layer and the first doping region is different from the distance between the emitter layer and the second doping region.

Abstract: A tandem solar cell includes: a substrate; a front electrode disposed on the substrate; a back electrode disposed opposite to the front electrode on the substrate; a first cell disposed below the front electrode and including a first buffer layer and a first light absorption layer; and a second cell disposed above the back electrode and including a second light absorption layer and a second buffer layer. The first light absorption layer includes a CuGaSeS layer and a CuGaSe layer, and the second light absorption layer includes a semiconductor compound selected from the group consisting of CuInSe2, CuInGaSe2, CuInSeS, CuInGaSeS and any combinations thereof. The CuGaSeS layer of the first light absorption layer is disposed closer than the CuGaSe layer of the first light absorption layer to the front electrode.

Abstract: A solar cell includes a semiconductor substrate having a texturized surface, the semiconductor substrate including a plurality of recess portions and a plurality of flat portions, an insulation layer on the texturized surface of the semiconductor substrate and an electrode on the plurality of flat portions of the semiconductor substrate. The insulation layer on the plurality of recess portions of the semiconductor substrate is thinner than the insulation layer on the plurality of flat portions of the semiconductor substrate.

Abstract: A solar cell and method of manufacturing the same includes a semiconductor substrate having a textured surface and including a plurality of recess portions and a plurality of flat portions, an emitter layer in the plurality of recess portions, a first doping region in at least one of the plurality of flat portions, and doped with a first conductive type impurity selected from one of p-type and n-type impurities, a second doping region in at least one of the plurality of flat portions, and doped with a second conductive type impurity selected from one of p-type and n-type impurities that differs from the first conductive type impurity, and first and second electrodes electrically connected to the first and second doping regions, respectively. The distance between the emitter layer and the first doping region is different from the distance between the emitter layer and the second doping region.

Abstract: A thin film solar cell, includes: a first electrode; a light absorption layer including a first light absorption layer including a group I element-group III element-group VI element compound, a second light absorption layer including a group I element-group III element-group VI element compound, and a third light absorption layer including a group I element-group III element-group VI element compound; and a second electrode, wherein the first light absorption layer has a band gap, which is less a band gap of the second light absorption layer, the band gap of the second light absorption layer is less than a band gap of the third light absorption layer, and the second light absorption layer has a band gap gradient, which increases in a direction from the first light absorption layer to the third light absorption layer.

Abstract: A tandem solar cell includes: a substrate; a front electrode disposed on the substrate; a back electrode disposed opposite to the front electrode on the substrate; a first cell disposed below the front electrode and including a first buffer layer and a first light absorption layer; and a second cell disposed above the back electrode and including a second light absorption layer and a second buffer layer. The first light absorption layer includes a CuGaSeS layer and a CuGaSe layer, and the second light absorption layer includes a semiconductor compound selected from the group consisting of CuInSe2, CuInGaSe2, CuInSeS, CuInGaSeS and any combinations thereof. The CuGaSeS layer of the first light absorption layer is disposed closer than the CuGaSe layer of the first light absorption layer to the front electrode.

Abstract: A solar cell, including a substrate, a first electrode disposed on the substrate, a photoelectric conversion layer disposed on the first electrode, and a second electrode disposed on the photoelectric conversion layer, wherein a grating is disposed on at least one of the first electrode and the second electrode.