Abstract:
생산성을 향상시킨 나노 입자의 제조 방법, 발광 소자의 제조 방법 및 표시 기판의 제조 방법이 개시된다. 나노 입자의 제조 방법에서, 폴리에틸렌글리콜에 혼합된 전구체(precursor)를 열분해하고, 폴리에틸렌글리콜 내에서 전구체가 열분해되어 나노 입자를 형성한다. 이에 따라, 독성이 적고, 저가의 용매인 폴리에틸렌글리콜을 이용함으로써 나노 입자의 생산 원가를 절감시켜 생산성을 향상시킬 수 있다. 나노 입자, 양자점, 폴리에틸렌글리콜, PEG, 회수, 소수성 용매
Abstract:
본 발명은 양자점 덴드리머를 이용한 광전변환소자에 관한 것으로, 더욱 상세하게는 광활성층으로 다수의 양자점들이 3차원적으로 결합하여 이루어진 양자점 덴드리머를 포함하는 광전변환소자에 관한 것으로, 양자점 덴드리머를 포함함으로써 우수한 광전변환효율을 나타낸다. 광전변환소자, 양자점 덴드리머, 태양전지, 포토다이오드
Abstract:
PURPOSE: A method for changing the light emitting wavelength of multi-layered semiconductor nano-crystal is provided to reversibly change the wavelength by introducing electric charges on the surface of the crystal. CONSTITUTION: Multi-layered semiconductor nano-crystal includes two or more semiconductor layers(10, 20) composed of one or more semiconductor materials. Electric charges are introduced on the surface of or the inside of the multi-layered semiconductor nano-crystal by processing the multi-layered semiconductor nano-crystal with electron donors and acceptors or applying electric filed to the multi-layered semiconductor nano-crystal. Charged electric charges are eliminated.
Abstract:
PURPOSE: A photoelectric conversion device using a quantum dot dendrimer is provided to offer an excellent absorption of a light the per square compared to a single quantum dot, by having a structure that the quantum dot of a umber nanometer size is integrated three dimensionally. CONSTITUTION: A first electrode(22) and a second electrode(25) separated with a fixed interval is formed on an upper part of a substrate(21). The first electrode and the second electrode are an opaque electrode. A photoactive layer(24) is formed between the first electrode and the second electrode. The photoactive layer includes a quantum dot dendrimer. The quantum dot dendrimer is formed with combining a plurality of quantum dots with three-dimensional. The quantum dot dendrimer is a sphere shape, a polyhedron shape, a shape of ellipse or a cylindrical.
Abstract:
PURPOSE: A method for manufacturing nanoparticles is provided to reduce a production cost of the nanoparticles using polyethylene glycol(PEG) which has a small amount of toxicity and is a cheap solvent and to improve productivity of the nanoparticles. CONSTITUTION: A method for manufacturing nanoparticles comprises: a step(S20) of pyrolyzing a precursor which is mixed with polyethylene glycol; a step(S30) of forming the nanoparticles through pyrolysis; a step(S40) of mixing the polyethylene glycol with a hydrophobic solvent which is more hydrophobic than the polyethylene glycol; and a step(S50) of separating the polyethylene glycol which is precipitated within the hydrophobic solvent from the nanoparticels. The average molecular weight of the polyethylene glycol is 1500-4000.
Abstract:
PURPOSE: A semiconductor nanocrystal in which electric charge is introduced on the surface and an optical device including the same are provided to be applied to all kinds of optical devices including an electro-optic modulator by showing reversible change of an emitting wavelength and high photon luminous efficiency when an electric field is applied. CONSTITUTION: A semiconductor nanocrystal in which electric charge is introduced on the surface is a multi-layered semiconductor nanocrystal including two or more semiconductor layers. The semiconductor nanocrystal has one or more interfaces in which a band-gap crosses and the electric charge is introduced on the surface of the semiconductor nanocrystal. A conduction band of a first semiconductor layer(10) is higher than the conduction band of a second semiconductor layer(20). A valence band of the first semiconductor layer is higher than the valence band of the second semiconductor layer.
Abstract:
The present invention relates to a layered double hydroxide and a manufacturing method thereof and, more specifically, to the layered double hydroxide and mixed metal oxide catching nanoparticles and the manufacturing method thereof. The nanoparticle-layered double hydroxide composite of the present invention can be produced under mild conditions, be mass-produced and reduce production costs. Moreover, the properties of the composite can be controlled since the composite is manufactured by using synthetic nanoparticles in which physical properties including size etc are controlled. The nanoparticle-layered double hydroxide of the present invention can be used as a layered double hydroxide in various application fields including anion exchangers, catalyst supporters, electronic materials, optical coating materials, ultraviolet ray absorption bodies and optical catalyst etc and additionally has a property according to the interaction of the nanoparticles and parent materials catching the nanoparticles. A synthesized composite reduces the penetration of foreign materials like gas or moisture by forming a layered double hydroxide structure surrounding nanoparticles. The composite can prevent phase separation or aggregation when heat is applied by enlarging the spatial restriction power of nanoparticles in the composite. In a quantum dot nanoparticle-layered double hydroxide or a mixed metal oxide composite, a metal oxide or a layered double hydroxide acts as the surface protection layer of a quantum dot, thereby promoting a phenomenon such as the improvement of emission properties. [Reference numerals] (AA) Divalent or trivalent metal cation;(BB) Hydroxyl ion;(CC) Nanoparticle having a functional group of negative charge;(DD) Composition unit of octahedron
Abstract:
본 발명은 층상이중수산화물 및 그 제조 방법에 관한 것으로서, 보다 상세하게는 나노 입자를 포획하고 있는 층상이중수산화물 및 혼합금속산화물 및 그 제조 방법에 관한 것이다. 본 발명의 나노입자-층상이중수산화물 복합체는 온화한 조건에서 생성이 가능하여, 대량생산 및 생산단가 절감이 가능하다. 또한 크기 등의 물성이 조절된 합성 나노입자들을 이용하여 복합체를 만들기 때문에 복합체의 특성 제어가 가능하다. 본 발명의 나노입자-층상이중수산화물은 층상이중수산화물로서 음이온교환체, 촉매지지체, 전자재료, 광학코팅재료, 자외선 흡수체, 광촉매 등 여러 응용분야에서 사용할 수 있으며, 나노입자와 나노입자를 포획하고 있는 모체의 상호작용에 따른 특성이 추가적으로 부여될 수 있다. 합성된 복합체는 나노 입자를 둘러싼 층상이중수산화물 구조를 이루게 되기 때문에 기체나 수분과 같은 외부물질의 침투를 줄여줄 수 있어, 나노 입자를 외부 환경으로부터 보호할 수 있다. 한편, 복합체 내에서의 나노입자의 공간적 구속력이 커지게 되어 열이 가해졌을 때의 서로 phase 분리나 뭉침을 방지할 수 있다. 양자점 나노입자-층상이중수산화물 또는 혼합금속산화물 복합체는 금속산화물 또는 층상이중수산화물이 양자점의 표면 보호층으로 작용하여 발광특성 향상과 같은 현상을 도모할 수 있다.
Abstract:
본 발명은 양자점 및 이를 이용한 발광 소자에 관한 것으로서, 보다 상세하게는 혼합금속산화물-양자점 복합체 및 이를 이용한 발광 소자에 관한 것이다. 본 발명에 따른 발광 소자는 혼합금속산화물-양자점 복합체를 이용하여 발광된 광을 변환시키는 것을 특징으로 한다. 본 발명에서와 같이, 혼합금속산화물 표면 보호층이 표면에 도입된 양자점은 외부의 산소나 수분과 같은 외부물질의 침투를 최소화하여 양자점의 발광특성을 보호할 수 있다. 그러므로 안정한 양자점 발광 소재로 이용될 수 있다. 또한 혼합이중산화물은 가시광선 영역에서 높은 광투과성을 가지고 있으므로 발광소재로 이용하기에 적합하다.
Abstract:
The present invention relates to a method for manufacturing electrospun polystyrene nanofibers and a method for manufacturing electrospun polystyrene-quantum dot hybrid nanofibers using a styrene monomer, without using a solvent, wherein the method for manufacturing electrospun polystyrene-quantum dot hybrid nanofibers comprises the steps of: manufactuirng a polystyrene-quantum dot composite by heating the mixture of liquid styrene monomer and a quantum dot; and a electrospinning the polystyrene-quantum dot composite. [Reference numerals] (AA) Heating