Korea Institute of Science and Technology

Ho Seong Jang

Seung Yong Lee

So Hye Cho

Hyungduk Ko

A Ra Hong

Gumin Kang

Joon Soo Han

Sang Soo Han

Kyoungja Woo

Il Ki Han

Sun Jin Kim

Hyo Bin Nam

Su Yeon Kim

Ji Yeon Lee

Ji Won Choi

Kwan Young Lee

Jin Seok Kim

Jong Ku Park

Byung Ki Cheong

Jung Ah Lim

Yong Won Song

Byung Chul Yeo

So-Hye Cho

Hyun Jung Yi

Hyung Duk Ko

Su Youn Lee

Doo-hyun Ko

Kipil Lim

Khan Sovann

Gi Yong Lee

A-Ra Hong

Kisun Park

Cho-long Jung

The present disclosure relates to a transparent luminescent solar concentrator (LSC). The LSC according to an embodiment of the present disclosure includes a polymer resin panel uniformly doped with phosphors. Accordingly, it is possible to greatly improve the transmittance and optical haze compared to the existing LSC manufactured by physically mixing or coating phosphors on the front side of the panel. In addition, it is possible to greatly improve the light collection efficiency of the LSC through the arrangement structure of the solar cells embedded in the polymer resin panel. The polymer resin panel according to an embodiment may be manufactured with flexibility or rigidity according to the purpose of use, and thus can be widely applied to curved structures, for example, building windows, automobile glasses and greenhouse roofs.

Luminescent solal concentrator with phosphor-doped polymer resin

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 core/multishell tetragonal upconversion nanophosphor capable of being excited by near-infrared (NIR) light having wavelengths of 800&#xb1;20 nm, 980&#xb1;20 nm, and 1532&#xb1;20 nm to emit light of blue, green, red, and combinations thereof.

Full-color-tunable upconversion nanophosphor

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

A plasmonic structure having an identifier pattern indicating a genuine product for preventing counterfeiting, falsification or reuse, includes a metal layer; a photoconversion pattern layer including a plurality of photoconverting nanoparticles disposed in a pattern on and in direct contact with the metal layer; a metal pattern layer including a plurality of metal particles disposed in a pattern on and in direct contact with the photoconversion pattern layer; and an adhesive film disposed on the metal pattern layer. An identifier pattern indicating a genuine product is easily identified even by visual inspection after irradiation with infrared light irradiation. The plasmonic structure is fundamentally impossible to re-assemble after deformation of the plasmonic structure caused by disassembly of a product or packaging container, thereby preventing counterfeiting, falsification or reuse.

Plasmonic structure having an identifier pattern indicating a genuine product and method of use for preventing counterfeiting, falsification or reuse of the product

The present invention relates to a non-invasive health indicator monitoring system including a sensing module, an electric power storage module, and a circuit module to collect health indicator information by contacting with a subject. In addition, the present invention also relates to a method for monitoring health indicator continuously by using the health indicator monitoring system.

Non-invasive health indicator monitoring system and using 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

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

A nanophosphor in accordance with one exemplary embodiment of the present disclosure includes a fluoride-based nanoparticle co-doped with Ceand one selected from a group consisting of Tb, Euand a combination thereof. The nanophosphor may be excited by a single wavelength of ultraviolet rays to emit various colors of green, yellow, orange, red and the like, and exhibit high photostability without photoblinking. The nanophosphor may be utilized as a bio imaging contrast agent, a transparent display device, an anti-counterfeit code and the like.

Color tunable multifunctional nanophosphor, synthesis method thereof, and polymer composite including the nanophosphor

The present invention relates to a nanophosphor which may be used as a wavelength conversion part of a solar cell, a fluorescent contrast agent, and a light emitting part of a display device, and a synthesis method thereof. The nanophosphor of the present invention is excited by ultraviolet light to exhibit strong green light emission, and has multicolor light emission characteristics capable of controlling a color such as green, yellowish green, yellow, and orange color by only adjusting the amount of a doping agent.

Multicolor tunable nanophosphor and its synthesis method and transparent polymer composite including the nanophosphor

The present invention relates to a nanophosphor and a synthesis method thereof, and provides a nanophosphor comprising a first compound of Formula 1, wherein the first compound is fluoride-based one which is co-doped with Ceand Tb.NaGdMF:Ce,Tb&#x2003;&#x2003;(1) In the Formula 1, descriptions on the p, q, r and M are overlapped with what was described in the detailed description of the present invention, so their concrete description are omitted. The nanophosphor has good light emission intensity and magnetic property as well as up-conversion and/or down-conversion property able to emit visible light after excitation by infrared and/or ultraviolet rays, so can be applied to a contrast agent and a counterfeit prevention code.

Growing community of inventors

Seoul, South Korea

Ho Seong Jang