Abstract: A functional layer forming ink used in forming a functional layer of the self-luminous element by a printing method, the ink including functional material dissolved or dispersed in a mixed solvent including solvents having different boiling points. When one or more solvents are selected from the solvents of the mixed solvent in descending order of boiling point until a mass ratio of the selection to the mixed solvent is a defined ratio or more, the one or more solvents in the selection are included in a solvent group of solvents that have a contact angle of 5° or less with respect to a defined resin material.

Abstract: An ink used in forming a functional layer of a self-luminous element by a printing method, the ink including a functional material and a mixed solvent. The mixed solvent includes solvents each having different vapor pressures. The functional material is dissolved or dispersed in the mixed solvent. A solvent that has a lowest vapor pressure among the solvents has a viscosity of at least 53 mPa·s, and a viscosity of the mixed solvent is 15 mPa·s or less.

Abstract: An organic EL element including an anode, a first functional layer including organic material, disposed above the anode, a second functional layer including organic material, disposed on and in contact with the first functional layer, a light emitting layer disposed on and in contact with the second functional layer, and a cathode disposed above the light emitting layer. A highest occupied molecular orbital (HOMO) level of the organic material of the second functional layer has an energy level at least 0.2 eV lower than that of a HOMO level of the organic material of the first functional layer, and film thickness of the second functional layer is 15 nm or less.

Abstract: An ink used in forming a functional layer of a self-luminous element by a printing method, the ink including a functional material and a mixed solvent. The mixed solvent includes solvents each having different vapor pressures. The functional material is dissolved or dispersed in the mixed solvent. A solvent that has a lowest vapor pressure among the solvents has a viscosity of at least 53 mPa·s, and a viscosity of the mixed solvent is 15 mPa·s or less.

Abstract: A functional layer forming ink used in forming a functional layer of the self-luminous element by a printing method, the ink including functional material dissolved or dispersed in a mixed solvent including solvents having different boiling points. When one or more solvents are selected from the solvents of the mixed solvent in descending order of boiling point until a mass ratio of the selection to the mixed solvent is a defined ratio or more, the one or more solvents in the selection are included in a solvent group of solvents that have a contact angle of 5° or less with respect to a defined resin material.

Abstract: There is provided a manufacturing method for an organic electroluminescent panel that includes an organic electroluminescent element for each sub-pixel. The manufacturing method includes an application step of recoating a first organic material layer and a second organic material layer, which include principal components common to each other, to manufacture the organic electroluminescent element. At the application step, after the first organic material layer is applied, an insolubilization process is performed for the first organic material layer to provide a change to a structure of molecules included in the first organic material layer, and the second organic material layer is applied to the first organic material layer after the insolubilization process is performed.

Abstract: A light emitting device includes: a base substrate; banks extending in a direction along a surface of the base substrate; and light emitting elements extending along the direction in groove regions defined by the banks. Each light emitting element includes one or more functional layers between a pair of electrodes. Within at least one of the groove regions: a sub-bank extends along the one direction and has a height equal to or smaller than a height of the banks; for each of the one or more functional layers in the groove regions, portions of each of the one or more functional layers on each side of the sub-bank are made of a same material; and a thickness of the one or more functional layers is smaller than a height of the sub-bank.

Abstract: An organic EL display panel includes plural streaks of first partition walls 16 on the upper side of an underlying layer 13 in such a manner that each of the plural streaks of the first partition walls 16 extends along a first direction, plural streaks of second partition walls 14 that are on the upper side of the underlying layer 13 in such a manner that each of the plural streaks of the second partition walls 14 extends along a second direction intersecting the first direction, and each have an upper surface 14a at a position lower than upper surfaces 16a of the first partition walls 16, and a light emitting layer 17 formed along the first direction on the upper side of the underlying layer 13 and in gaps 20 between the first partition walls 16 adjacent to each other in such a manner as to get over the plural streaks of the second partition walls 14. An organic EL display panel in which luminance unevenness is suppressed is thereby obtained.

Abstract: A display panel including a substrate; first, second, and third lower electrodes; first and second column banks; first, second, and third organic light-emitting layers; and an upper electrode. When a first ink for forming the first organic light-emitting layer, a second ink for forming the second organic light-emitting layer, and a third ink for forming the third organic light-emitting layer are applied, ink-separating capability of the first column bank for separating the first ink and the second ink is lower than ink-separating capability of the second column bank for separating the second ink and the third ink, and ink-separating capability depends on: (i) a height of the first and second column banks, or (ii) liquid repellency of the first column bank against the first ink and the second ink and liquid repellency of the second column bank against the second ink and the third ink.

Abstract: An organic electroluminescent panel includes a plurality of pixels and a plurality of banks. The pixels each include a plurality of subpixels. The subpixels each include an organic electroluminescent element that includes a first electrode, a second electrode, and an organic material layer that is provided between the first electrode and the second electrode. The banks define each of the subpixels in each of the pixels. The organic electroluminescent element in each of the subpixels is provided in a gap between adjacent two of the banks, and the following relational expression is satisfied: y?0.0001714x2+0.0151429x+0.2914286 where y denotes a height, from a bottom surface of the gap, of a pinning position at which a surface of the organic material layer and one of the banks are in contact with each other, and x denotes a width of the bottom surface of the gap.

Abstract: A light emitting device includes: a base substrate; banks extending in a direction along a surface of the base substrate; and light emitting elements extending along the direction in groove regions defined by the banks. Each light emitting element includes one or more functional layers between a pair of electrodes. Within at least one of the groove regions: a sub-bank extends along the one direction and has a height equal to or smaller than a height of the banks; for each of the one or more functional layers in the groove regions, portions of each of the one or more functional layers on each side of the sub-bank are made of a same material; and a thickness of the one or more functional layers is smaller than a height of the sub-bank.

Abstract: An organic electroluminescent panel includes a plurality of pixels and a plurality of banks. The pixels each include a plurality of subpixels. The subpixels each include an organic electroluminescent element that includes a first electrode, a second electrode, and an organic material layer that is provided between the first electrode and the second electrode. The banks define each of the subpixels in each of the pixels. The organic electroluminescent element in each of the subpixels is provided in a gap between adjacent two of the banks, and the following relational expression is satisfied: y?0.0001714x2+0.0151429x+0.2914286 where y denotes a height, from a bottom surface of the gap, of a pinning position at which a surface of the organic material layer and one of the banks are in contact with each other, and x denotes a width of the bottom surface of the gap.

Abstract: An organic light emitting device including: a base substrate; column banks extending in one direction along a surface of the base substrate; and light emitting elements extending along the one direction in groove regions defined by the column banks, wherein each of the light emitting elements has one or more functional layers sandwiched between a pair of electrodes, and within at least one of the groove regions: a sub-bank extends along the one direction and has a height equal to or smaller than a height of the column banks, and for each of the one or more functional layers therein, portions thereof on either side of the sub-bank are made of the same material.

Abstract: There is provided a manufacturing method for an organic electroluminescent panel that includes an organic electroluminescent element for each sub-pixel. The manufacturing method includes an application step of recoating a first organic material layer and a second organic material layer, which include principal components common to each other, to manufacture the organic electroluminescent element. At the application step, after the first organic material layer is applied, an insolubilization process is performed for the first organic material layer to provide a change to a structure of molecules included in the first organic material layer, and the second organic material layer is applied to the first organic material layer after the insolubilization process is performed.

Abstract: An organic EL display panel includes plural streaks of first partition walls 16 on the upper side of an underlying layer 13 in such a manner that each of the plural streaks of the first partition walls 16 extends along a first direction, plural streaks of second partition walls 14 that are on the upper side of the underlying layer 13 in such a manner that each of the plural streaks of the second partition walls 14 extends along a second direction intersecting the first direction, and each have an upper surface 14a at a position lower than upper surfaces 16a of the first partition walls 16, and a light emitting layer 17 formed along the first direction on the upper side of the underlying layer 13 and in gaps 20 between the first partition walls 16 adjacent to each other in such a manner as to get over the plural streaks of the second partition walls 14. An organic EL display panel in which luminance unevenness is suppressed is thereby obtained.

Abstract: A solution contains a functional material for constituting a function layer, and a solvent. The solvent contains a high-boiling-point solvent composed of one or more solvent components having a boiling point of not less than 200° C. The high-boiling-point solvent has a viscosity of from 13 mPa·s to 25 mPa·s, inclusive, and a surface tension of from 33 mN/m to 37 mN/m, inclusive.

Abstract: An organic EL display panel includes plural streaks of first partition walls juxtaposed on the upper side of an underlying layer in such a manner that each of the plural streaks of the first partition walls extends along a first direction, plural streaks of second partition walls that are juxtaposed on the upper side of the underlying layer in such a manner that each of the plural streaks of the second partition walls extends along a second direction intersecting the first direction, and each have an upper surface at a position lower than upper surfaces of the first partition walls, and a light emitting layer formed along the first direction on the upper side of the underlying layer and in gaps between the first partition walls adjacent to each other in such a manner as to get over the plural streaks of the second partition walls.

Abstract: A display panel including a substrate; first, second, and third lower electrodes; first and second column banks; first, second, and third organic light-emitting layers; and an upper electrode. When a first ink for forming the first organic light-emitting layer, a second ink for forming the second organic light-emitting layer, and a third ink for forming the third organic light-emitting layer are applied, ink-separating capability of the first column bank for separating the first ink and the second ink is lower than ink-separating capability of the second column bank for separating the second ink and the third ink, and ink-separating capability depends on: (i) a height of the first and second column banks, or (ii) liquid repellency of the first column bank against the first ink and the second ink and liquid repellency of the second column bank against the second ink and the third ink.

Abstract: A method of forming a hole transport layer in which an amount of ink per unit surface area to be applied to a plurality of groove regions is set so as to decrease in an order R, G, B. Prior to applying the ink, a nozzle head is scanned across while applying only solvent to each of the groove regions. At this time, an amount of the solvent to be applied to the groove regions is set so as to increase in the order R, G, B.

Abstract: A solution contains a functional material for constituting a function layer, and a solvent. The solvent contains a high-boiling-point solvent composed of one or more solvent components having a boiling point of not less than 200° C. The high-boiling-point solvent has a viscosity of from 13 mPa·s to 25 mPa·s, inclusive, and a surface tension of from 33 mN/m to 37 mN/m, inclusive.