Abstract:
본 발명은 초음파 분무 열분해 방법을 이용하여 셀레나이드계 계열의 형광체를 합성하는 방법에 관한 것으로서, (a) 전구체로서 스트론튬 수용성염;과 셀레늄 수용성염; 및 활성제로서 유로피움 수용성염;을 증류수에 용해시켜 분무 용액을 제조하는 단계, (b) 상기 분무 용액을 초음파 액적발생장치를 이용하여 액적으로 분무시키는 단계, (c) 상기 액적을 질소운반가스를 이용하여 초음파 분무 열분해장치의 관형 반응기내로 이동시키는 단계, (d) 상기 초음파 분무 열분해장치의 관형 반응기에서 반응시켜서 형광체 입자를 형성하는 단계 및 (e) 상기 형광체 입자에 대해서 수소와 질소의 혼합가스 분위기에서 열처리하여 형광체 입자를 결정화시키고 활성화시키는 단계를 포함하는 것을 특징으로 하며, 본 발명에 따른 셀레나이드계 계열의 구형 형광체 입자는 결정성 및 순도가 우수하고, 근자외선 및 청색 영역에서 높은 여기 효율을 나타내어 이를 백색 LED에 적용시 넓은 발광 스펙트럼을 나타내며 기존의 백색 LED보다 � �색지수와 효율이 향상된 백색 LED의 구현이 가능하다.
Abstract:
본 발명을 통해 개발된 Se 계열 무기 형광체는 조성비 및 합성 공정의 변화를 통해 쉽게 황색뿐 아니라 다른 발광 파장대의 형광체 합성도 가능한 장점이 있다. 본 발명을 통해 개발된 청색 및 녹색과 적색 형광체를 동시에 UV LED와 결합하여 백색 LED를 구현하면, 100 lm/W 이상의 고효율을 가지며, 연색지수 및 색상관 온도가 향상된 조명용으로 적합한 백색 LED 구현이 가능할 것이다.
Abstract:
PURPOSE: A multi-component semiconductor luminescent nanoparticle and a phosphor for white led which includes the same are provided to implement various light emitting regions and being harmless for human body and environment. CONSTITUTION: A multi-component semiconductor luminescent nanoparticle is composed of semiconductors having three phases or greater. The nano particle has a core-shell structure and includes three or more core materials selected from elements of VIII family, IB family, IIB family, III family, VI family and a shell material selected from ZnS, ZnO, ZnSe and ZnTe formed on the core material. The nanoparticle is formed by being capped with one selected from polymethylmethacrylate, polypropylene, polystyrene, polyethylene terephthalate and silica.
Abstract:
본 발명은 프라세오디뮴과 망간이 도핑된 황화아연 백색발광나노입자 제조 방법 및 이를 이용하여 제조된 백색 발광다이오드에 관한 것으로, 조명용으로 사용될 수 있는 높은 연색성과 발광 효율 가지는 백색 발광 다이오드를 제작하기 위하여, ZnS:(Pr,Mn)을 솔보써멀법(Solvothermal)으로 제조함으로써, 새로운 고효율 백색발광나노입자를 제조할 수 있도록 하는 발명에 관한 것이다.
Abstract:
PURPOSE: A white light emitting diode with superior color rendering and a manufacturing method thereof are provided to add red light emitting semiconductor nano particles to a white light emitting diode device, thereby increasing the color rendering index of a white light emitting diode. CONSTITUTION: A coating composition includes an orange light emitting fluorescent object and a core-shell structure. The core is a nano particle which emits light at a wavelength of 600~650nm. The shell is selected from silica, polystyrene, polymethyl methacrylate, and polycarbonate. The coating composition is coated on the surface of a blue light emitting diode.
Abstract:
PURPOSE: A manufacturing method of a selenide-based phosphor is provided to synthesize a selenide-based spherical phosphor particle which has excellent crystallinity and purity and high excitation efficiency in a UV and blue ray region. CONSTITUTION: A manufacturing method of a selenide-based phosphor comprises a step of mixing a strontium aqueous salt, selenium aqueous salt, and europium aqueous salt into distilled water to manufacture a spray solution; a step of spraying the spray solution with a liquid droplet, by using an ultrasonic wave liquid droplet generator; a step of transferring the liquid droplet into a tube reactor; a step of forming a phosphor particle by conduct a reaction in the tube reactor; a step of conducting heat treatment under a mixed gas atmosphere of hydrogen and nitrogen to crystallize and a activate the phosphor particle.
Abstract:
PURPOSE: A selenide-based phosphor is provided to enable the synthesis of yellow color phosphor or a phosphor with the other light emitting wavelength through the change of a composition ratio and a synthesis process. CONSTITUTION: A selenide-based phosphor for a white light emitting device is represented by chemical formula 1: A_aB_bS_xSe_y:X. In chemical formula 1, A is selected from Be, Mg, Ca, Sr, and Ba; B is selected from Be, Al, Ga, In, Y, La, Gd, Zn, Cd, Sn, Sb, Tl, Pb, and Bi; X is selected from Eu, Ce, Cu, Ag, Al, Tb, Cl, Br, F, I, Mg, Pr, K, Na, and Mn; 1
Abstract translation:目的:提供一种基于硒化物的荧光体,以通过组成比和合成过程的改变来合成黄色荧光体或具有其它发光波长的荧光体。 构成:用于白色发光器件的硒化物基荧光体由化学式1表示:A_aB_bS_xSe_y:X。 在化学式1中,A选自Be,Mg,Ca,Sr和Ba; B选自Be,Al,Ga,In,Y,La,Gd,Zn,Cd,Sn,Sb,Tl,Pb和Bi; X选自Eu,Ce,Cu,Ag,Al,Tb,Cl,Br,F,I,Mg,Pr,K,Na和Mn; 1 <= a <= 2,1 <= b <= 3,0 <= x <= 2,0 <= y <= 3; X为总摩尔数的0.0001-10摩尔%。
Abstract:
PURPOSE: A method for synthesizing pr and a Mn doped Zns white light emitting nano-particle and white light emitting diode fabricated using thereof are provided to obtain high color rendering by manufacturing ZnS nano-particle through a solvothermal method. CONSTITUTION: A UV photo conversion semiconductor chip(30) emits UV light. A supporter(20) reflects light while supporting the UV photo conversion semiconductor chip. A concave groove is formed on the surface of the supporting in order to efficiently reflect the UV light. When ZnS nano particle(10) is filled into the groove, white light is generated through the UV light from the UV photo conversion semiconductor chip.