Korea Institute of Science and Technology

So Hye Cho

Seung Yong Lee

Ho Seong Jang

Joon Soo Han

A Ra Hong

Jong Ku Park

Hyungduk Ko

Hyung Ho Park

Bok Ryul Yoo

Sang Soo Han

Ji Young Byun

Yun Hee Kim

Kwang-Deok Choi

Hyo Bin Nam

Dong Kyu Kim

Kwan Young Lee

Il Ki Han

Bong Geun Song

Sun Jin Kim

Gumin Kang

Joon-Suh Park

Hyung Duk Ko

Byung Chul Yeo

Bong Gun Song

In Uk Baek

Inuk Baek

Md Abdur Rahman

Bo In Park

Sung Lim Choi

Kyunghoon Kim

Khan Sovann

Doo Hyun Ko

Dong Eui Jung

Provided is a high-durability coloring metal member. The high-durability coloring metal member includes a metal substrate, a dielectric layer provided on the metal substrate, and an oxynitride compound layer provided on the dielectric layer. The metal member is capable of expressing vivid and various colors with a color protection layer applied on the surface of the metal member.

High-durability coloring metal member and method of producing the same

The present disclosure relates to down-shifting nanophosphors, a method for preparing the same, and a luminescent solar concentrator (LSC) using the same. The down-shifting nanophosphors according to an embodiment of the present disclosure include a core including NaYFnanocrystals doped with neodymium (Nd) and ytterbium (Yb), and further include a neodymium (Nd)-doped crystalline shell surrounding the core, or further include a NaYFcrystalline shell surrounding the crystalline shell. Therefore, the down-shifting nanophosphors efficiently absorb near infrared rays with a wavelength range of 700-900 nm and efficiently emit near infrared rays with a wavelength range of 950-1050 nm. In addition, the down-shifting nanophosphors according to an embodiment of the present disclosure has a size of 60 nm or less, and thus can be applied to manufacture transparent LSC films with ease and can realize transparent solar cell modules having high near infrared ray shifting efficiency.

Down-shifting nanophosphors, method for preparing the same, and luminescent solar concentrator using the same

Provided is a coloring pattern structure. The coloring pattern structure includes: a substrate; a light-transmitting dielectric layer formed on at least one surface of the substrate; and a composite material layer disposed on an upper surface of the light-transmitting dielectric layer and formed of a metal and a first material not having a thermodynamic solid solubility in the metal, wherein the metal included in the composite material layer has a pattern coated only on portions of the upper surface of the light-transmitting dielectric layer, and the first material is coated on the remaining area where the metal is not coated.

Coloring pattern structure and method of manufacturing the same

Provided is a fluoride nanophosphor using, as cores, luminescent nanoparticles expressed by Chemical Formula 1.LiErLF:Tm&#x2003;&#x2003;[Chemical Formula 1] (In Chemical Formula 1, x is a real number satisfying 0&#x2264;x&#x2264;0.3, y is a real number satisfying 0&#x2264;y&#x2264;0.8 and is selected within a range satisfying 0&#x2264;x+y&#x2264;0.9, and L is any one selected from the group consisting of yttrium (Y), lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), samarium (Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), ytterbium (Yb), lutetium (Lu), and a combination thereof.)

Core/multi-shell upconversion fluoride nanophosphor exhibiting luminescence under various excitation wavelengths, and method of synthesizing the same

Provided is a dye-sensitized upconversion nanophosphor including a core, a first shell surrounding at least part of the core, and an organic dye bonded to a surface of the nanophosphor which has an absorption band ranging from 650 nm to 850 nm and which is excited in a near-infrared region to emit visible light. The dye-sensitized upconversion nanophosphor may be included in a display apparatus, a fluorescent contrast agent, or an anti-counterfeiting code. The organic dye may be an IR-808 dye.

Dye-sensitized upconversion nanophosphor

A catalyst and a catalyst composition, a method for preparing thereof, and a method for synthesizing of hydrogen peroxide using them are provided. The catalyst and the catalyst composition contains: an alloy of two elements, wherein the elements are Pt (Platinum) and Ni (Nickel). The present disclosure enables (a) replacing a high-priced palladium (Pd) catalyst with a new catalyst, (b) providing a high-active catalyst which catalyzes the direct synthesis reaction of the hydrogen peroxide.

Catalyst, catalyst composition containing Pt&#x2014;Ni alloy and methods for synthesizing of hydrogen peroxide using them

The present invention relates to a solar cell having a wavelength converting layer formed of a polysilazane and a manufacturing method thereof to allow for low temperature sintering, to protect a wavelength converter from oxidation, degradation, and whitening, and thereby improve efficiency of the solar cell. The present invention provides for the solar cell including the wavelength converting layer which is formed by applying a coating solution containing a solvent, a polysilazane, and a wavelength converter onto a cell and an outer surface or inside of the cell, and then curing, and a manufacturing method of.

Solar cell having wavelength converting layer and manufacturing method thereof

Provided is a catalyst for synthesizing hydrogen peroxide as represented by the following Chemical Formula 1:RhAg,&#x2003;&#x2003;[Chemical Formula 1]

Catalyst for synthesis of hydrogen peroxide and synthesis of hydrogen peroxide using same

There is provided a phosphor powder which includes a wavelength converting material and a silica-based inorganic substance surrounding the wavelength converting material and represented by the following Formula 1, wherein a content of a hydrosilyl group (Si&#x2014;H) is greater than or equal to 10 ppm by weight, based on the total weight of the silica-based inorganic substance: 

Phosphor powder and method of manufacturing the same

Provided are a nanophosphor and a silica composite including the nanophosphor. The nanophosphor has a core/first shell/second shell structure or a core/first shell/second shell/third shell structure, wherein the core includes a Yb-doped fluoride-based nanoparticle, the first shell is an up-conversion shell including a Yband Tm-codoped fluoride-based crystalline composition, the second shell is a fluoride-based emission shell, and the third shell is an outermost crystalline shell.

Color-tunable up-conversion nanophosphor

Provided is a nanophosphor having a core/double shell structure, the nanophosphor including a upconversion core including a Yb, Ho, and Ceco-doped fluoride-based nanophosphor represented by Formula 1; a first shell surrounding at least a portion of the upconversion core, and comprising a Ndand Ybco-doped fluoride-based crystalline composition represented by Formula 2; and a second shell surrounding at least a portion of the first shell, and having paramagnetic properties represented by Formula 3.

Core/double shell structured red light-emitting upconversion nanophosphors

The present invention relates to a novel method for preparing a water-insoluble metal hydroxide, and a use thereof. The water-insoluble metal hydroxide of the present invention is conveniently and efficiently prepared s through the high-temperature heat treatment step two times and the washing step, and thus contains a small amount of an alkali metal and has a high crystallinity and a phase purity. The water-insoluble metal hydroxide of the present invention or metal oxide therefrom exhibits an absorption wavelength at a low wavelength range (for example, 490 nm or less) and a light emitting wavelength at a high wavelength range (for example, from 500 nm or more to less than 1,100 nm). Accordingly, the water-insoluble metal hydroxide of the present invention may be efficiently used in various applications such as a fire retardant, an antacid, an adsorbent and so forth, and may also be doped with another metal ion to be utilized as a raw material for fabricating a catalyst, a fluorescent material, an electrode material, a secondary battery material and the like.

Water-insoluble metal hydrate containing an alkali metal and preparation methods thereof

Provided is a copper indium gallium selenium (CIGS)- or copper zinc tin sulfur (CZTS)-based solar cell including a back electrode layer and a light-absorbing layer, wherein the light-absorbing layer has a composition of CuInGa(SSe)(wherein 0.85&#x2266;x&#x3c;1, 0&#x3c;y&#x3c;1, 0&#x3c;z&#x3c;1, and each of x, y and z represents a real number) or CuZnSn(SSe)(wherein 1.4&#x2266;p&#x3c;2, 0&#x3c;q&#x3c;2, 0&#x3c;r&#x3c;2, and each of p, q and r represents a real number). The CIGS- or CZTS-based thin-film solar cell causes no interlayer delamination and has improved durability and photoelectric conversion efficiency. Also provided is a method for fabricating a CIGS- or CZTS-based thin-film solar cell by which conversion of molybdenum back electrode layer to molybdenum diselenide is controlled.

CIGS- or CZTS-based film solar cells and method for preparing the same

Disclosed is a method for producing a copper indium selenium (CIS) or copper indium gallium selenium (CIGS) thin-film light-absorbing layer. The method includes forming a coating layer of CIGS slurry, removing a solvent, a dispersant and a binder from the coating layer to form a powder coat layer, pressing the powder coat layer to improve its particle packing density, and heating the powder layer to form a dense thin film. The method uses a powder process as a non-vacuum process to produce a CIS or CIGS thin film in high yield at low cost. Further disclosed is a method for manufacturing a thin-film solar cell including the production method.

Growing community of inventors

Seoul, South Korea

So Hye Cho