Abstract: Provide is a light emitting device including a reflective layer including a phase modulation surface, a planarization layer disposed on the reflective layer, a first electrode disposed on the planarization layer, an organic emission layer disposed on the first electrode and configured to emit visible light that includes light of a first wavelength and light of a second wavelength that is shorter than the first wavelength, and a second electrode disposed on the organic emission layer, wherein the reflective layer and the second electrode form a micro cavity configured to resonate the light of the first wavelength, and wherein the planarization layer includes a light absorber configured to absorb the light of the second wavelength.

Abstract: Provide is a light emitting device including a reflective layer including a phase modulation surface, a planarization layer disposed on the reflective layer, a first electrode disposed on the planarization layer, an organic emission layer disposed on the first electrode and configured to emit visible light that includes light of a first wavelength and light of a second wavelength that is shorter than the first wavelength, and a second electrode disposed on the organic emission layer, wherein the reflective layer and the second electrode form a micro cavity configured to resonate the light of the first wavelength, and wherein the planarization layer includes a light absorber configured to absorb the light of the second wavelength.

Abstract: Provided are a resist composition and a method of forming a pattern using the same, wherein the resist composition may include an organometallic compound represented by Formula 1 below, and a polymer including a repeating unit represented by Formula 2 below. For a description of M11, R11, R12, n, A21, L21 to L23, A21 to a23, R21 to R22, b22, and p in Formula 1 and Formula 2, the specification is referred to.

Abstract: A light emitting device includes a first electrode; a white organic light emission structure provided on the first electrode; a second electrode provided on the white organic light emission structure; and a reflective layer provided on an opposite side of the first electrode from the white organic light emission structure and including a first reflective region, a second reflective region, and a third reflective region having different heights from one another and forming different separation distances from the second electrode. A plurality of recesses may be provided in at least one of the first reflective region, the second reflective region, and the third reflective region on a surface of the reflective layer, and thus the color purity of the light emitting device may be improved.

Abstract: Provided are an organometallic compound represented by one of Formulas 1-1 to 1-4 below. a resist composition including the same, and a pattern forming method using the same. For descriptions of M11, L11 to L14, a11 to a14, R11 to R14, X11 to X14, n11 to n15, Y11 to Y13, and R15 to R17 in Formulas 1-1 to 1-4, refer to the specification.

Abstract: Provided is a photoresist composition including an organometallic compound including: a central metal; a first ligand compound; and a second ligand compound, wherein the first ligand compound bonds with the central metal, the second ligand compound does not bond with the central metal, and the first or second ligand compound includes a halogen element. The photoresist composition may improve photosensitivity while securing stability.

Abstract: Provided are a resist composition and a method of forming a pattern using the same, the resist composition including an organometallic compound represented by Formula 1 below, and a polymer including a repeating unit represented by Formula 2 below: wherein, in Formulas 1 and 2, M11, R11, R12, n, A21, L21 to L23, a21 to a23, R21 to R24, b22, p, and X21 are as described in the specification.

Abstract: Provided are a resist composition and a pattern forming method using the same. The resist composition may include an organometallic compound represented by Formula 1 below and a polymer repeating unit represented by Formula 2 below. In Formulas 1 and 2, descriptions of M11, R11, R12, n, A21, L21 to L24, a21 to a24, R21, R22, b22, p, and X21 refer to the specification.

Abstract: Provided are a resist composition and a method of forming a pattern by using the same, the resist composition including: an organometallic compound represented by Formula 1; and a polymer including a repeating unit containing a radical generating group, a repeating unit containing a radical accepting group, or any combination thereof. Sn(R11)n(OR12)(4-n) ??Formula 1 Descriptions of R11, R12 and n in Formula 1 are provided in the specification.

Abstract: Provide is a light emitting device including a reflective layer including a phase modulation surface, a planarization layer disposed on the reflective layer, a first electrode disposed on the planarization layer, an organic emission layer disposed on the first electrode and configured to emit visible light that includes light of a first wavelength and light of a second wavelength that is shorter than the first wavelength, and a second electrode disposed on the organic emission layer, wherein the reflective layer and the second electrode form a micro cavity configured to resonate the light of the first wavelength, and wherein the planarization layer includes a light absorber configured to absorb the light of the second wavelength.

Abstract: Provide is a light emitting device including a reflective layer including a phase modulation surface, a planarization layer disposed on the reflective layer, a first electrode disposed on the planarization layer, an organic emission layer disposed on the first electrode and configured to emit visible light that includes light of a first wavelength and light of a second wavelength that is shorter than the first wavelength, and a second electrode disposed on the organic emission layer, wherein the reflective layer and the second electrode form a micro cavity configured to resonate the light of the first wavelength, and wherein the planarization layer includes a light absorber configured to absorb the light of the second wavelength.

Abstract: Provide is a light emitting device including a reflective layer including a phase modulation surface, a planarization layer disposed on the reflective layer, a first electrode disposed on the planarization layer, an organic emission layer disposed on the first electrode and configured to emit visible light that includes light of a first wavelength and light of a second wavelength that is shorter than the first wavelength, and a second electrode disposed on the organic emission layer, wherein the reflective layer and the second electrode form a micro cavity configured to resonate the light of the first wavelength, and wherein the planarization layer includes a light absorber configured to absorb the light of the second wavelength.

Abstract: A polyimide that is a reaction product of a diamine represented by Chemical Formula 1, a diamine represented by Chemical Formula 2, and a tetracarboxylic dianhydride represented by Chemical Formula 3: wherein, in Chemical Formulae 1 to 3, L1, L2, Ra to Rf, m, R2, R10, R12, R13, n7, and n8 are the same as defined in the specification.

Abstract: A diffractive optical element including a diffraction layer including a plurality of optical axes along an in-plane direction, wherein the diffraction layer includes an anisotropic material that satisfies one of Relationship Equations 1A to 3A ?n1(450 nm)<?n1(550 nm)??n1(650 nm)??Relationship Equation 1A ?n1(450 nm)??n1(550 nm)<?n1(650 nm)??Relationship Equation 2A ?n1(450 nm)=?n1(550 nm)=?n1(650 nm)??Relationship Equation 3A wherein, in Relationship Equations 1A to 3A, ?n1 (450 nm) is a birefringence of the anisotropic material at a wavelength of 450 nanometers, ?n1 (550 nm) is a birefringence of the anisotropic material at a wavelength of 550 nanometers, and ?n1 (650 nm) is a birefringence of the anisotropic material at a wavelength of 650 nanometers.

Abstract: A light emitting device includes a first electrode; a white organic light emission structure provided on the first electrode; a second electrode provided on the white organic light emission structure; and a reflective layer provided on an opposite side of the first electrode from the white organic light emission structure and including a first reflective region, a second reflective region, and a third reflective region having different heights from one another and forming different separation distances from the second electrode. A plurality of recesses may be provided in at least one of the first reflective region, the second reflective region, and the third reflective region on a surface of the reflective layer, and thus the color purity of the light emitting device may be improved.

Abstract: Provide is a light emitting device including a reflective layer including a phase modulation surface, a planarization layer disposed on the reflective layer, a first electrode disposed on the planarization layer, an organic emission layer disposed on the first electrode and configured to emit visible light that includes light of a first wavelength and light of a second wavelength that is shorter than the first wavelength, and a second electrode disposed on the organic emission layer, wherein the reflective layer and the second electrode form a micro cavity configured to resonate the light of the first wavelength, and wherein the planarization layer includes a light absorber configured to absorb the light of the second wavelength.

Abstract: A diffractive optical element including a diffraction layer including a plurality of optical axes along an in-plane direction, wherein the diffraction layer includes an anisotropic material that satisfies one of Relationship Equations 1A to 3A ?n1(450 nm)<?n1(550 nm)??n1(650 nm)??Relationship Equation 1A ?n1(450 nm)??n1(550 nm)<?n1(650 nm)??Relationship Equation 2A ?n1(450 nm)=?n1(550 nm)=?n1(650 nm)??Relationship Equation 3A wherein, in Relationship Equations 1A to 3A, ?n1 (450 nm) is a birefringence of the anisotropic material at a wavelength of 450 nanometers, ?n1 (550 nm) is a birefringence of the anisotropic material at a wavelength of 550 nanometers, and ?n1 (650 nm) is a birefringence of the anisotropic material at a wavelength of 650 nanometers.

Abstract: A polyimide that is a reaction product of a diamine represented by Chemical Formula 1, a diamine represented by Chemical Formula 2, and a tetracarboxylic dianhydride represented by Chemical Formula 3: wherein, in Chemical Formulae 1 to 3, L1, L2, Ra to Rf, m, R2, R10, R12, R13, n7, and n8 are the same as defined in the specification.

Abstract: A polyimide film, which is a reaction product of a diamine including an amide structural unit in an amount of greater than about 0 mol % and less than or equal to about 80 mol % and an aromatic dianhydride, wherein the polyimide film has a Martens hardness of about 14 N/mm2 to about 120 N/mm2 at a thickness of about 30 ?m to about 100 ?m.