Abstract: The present disclosure discloses a gradient single-crystal positive electrode material, which has a chemical formula of LiNixCoyA1-x-yO2@mLiaZbOc, wherein 0<x<1, 0<y<1, 0<x+y<1, 0<m<0.05, 0.3<a?10, 1?b<4, and 1?c<15, A is at least one of Mn, Zr, Sr, Ba, W, Ti, Al, Mg, Y, and Nb, and Z is at least one of B, Al, Co, W, Ti, Zr, and Si. The atomic ratio of the content of Co on the surface of the single-crystal positive electrode material particle to the content of Ni+Co+A on the surface is greater than 0.4 and less than 0.8, and the atomic ratio of Co at a depth 10% of the radius from the surface of the single crystal positive electrode material particle is not less than 0.3; and the single-crystal positive electrode material particle has a roundness of greater than 0.4, and is free from sharp corners.

Abstract: Disclosed are an oil field tracer, a method for oil field tracing, and a proppant composition. An oil field tracer having both magnetic and fluorescent functions is used, and can be enriched with a magnetic field when a producing well is sampled for testing.

Abstract: Disclosed in the present disclosure is a preparation method for a blue indium phosphide quantum dot. According to the present disclosure, at a predetermined temperature, the kernel of the indium phosphide quantum dot and the first zinc precursor are mixed, and the thiol is added for reaction to form the second mixed solution containing an intermediate product of the indium phosphide quantum dot; and then the anionic precursor having a lower reaction activity than the thiol is added for continuous reaction to obtain the blue indium phosphide quantum dot having a wavelength range of 450-480 nm. The blue indium phosphide quantum dot has a pure wavelength; and when the blue indium phosphide quantum dot is applied to an electroluminescent device, the brightness is greater than 100 nits, and external quantum efficiency is high up to 1.8%, and the application range of the indium phosphide quantum dot is widened.

Abstract: Disclosed are a method for preparing a fluorescent nanomaterial-polymer composite and a wavelength converting element, and a light emitting device. The method for preparing the fluorescent nanomaterial-polymer composite includes: at least one precursor provided, the precursor includes a fluorescent nanomaterial and a polymer; and in a first temperature at or higher than a melting point of the polymer, the precursor is mixed, and then cooled.

Abstract: The present application discloses a method for preparing an indium phosphide (InP) nanocrystal by using a novel phosphorus precursor as a raw material, and an InP nanocrystal having different wavelengths prepared by the method. The preparation method of the InP nanocrystal includes a step of: using M-(O—C?P)n as one of reaction precursors, where, M is a metal element, and n is a valence state of the M element. In this present application, M-(O—C?P)n serves as one of reaction precursors; due to that the metal element M and the element P are from the same reaction precursor, a nanocrystal of a nanocrystal core containing In, P and a metal element M can be prepared.

Abstract: The present disclosure provides a quantum dot ink, a color filter film, a display device and a color filter film preparation method, the quantum dot ink comprises quantum dots, siloxane and an acrylate compound, the quantum dot ink contains 1-50 wt % of the quantum dots, 5-50 wt % of the siloxane, and 10-90 wt % of the acrylate compound, wherein the siloxane is used to generate polysiloxane microspheres. When the siloxane is subjected to a reaction, so as to form the polysiloxane microspheres, which may reflect light that is not absorbed in the quantum dots such that the reflected light is re-absorbed in the quantum dots, so as to increase the amount of light absorbed by the quantum dots, thereby improving the light-emitting brightness of a color film prepared and formed in the quantum dot ink, effectively enhancing low utilization of excitation light, and improving a display effect of a display device.

Abstract: Provided in embodiments of the present disclosure are a light-emitting structure, a display apparatus and an illuminating apparatus. The light-emitting structure includes at least two light-emitting layers stacked layer by layer, wherein the at least two light-emitting layers are used to emit at least two colors; and a transparent electrode, which is disposed between adjacent light-emitting layers. By means of providing the transparent electrode between adjacent light-emitting layers, the present disclosure adjusts the light colors of the light-emitting structure effectively, and improves the resolution of the light-emitting structure.

Abstract: The present application discloses a method for preparing an indium phosphide (InP) nanocrystal by using a novel phosphorus precursor as a raw material, and an InP nanocrystal having different wavelengths prepared by the method. The preparation method of the InP nanocrystal includes a step of: using M-(O—C?P)n as one of reaction precursors, where, M is a metal element, and n is a valence state of the M element. In this present application, M-(O—C?P)n serves as one of reaction precursors; due to that the metal element M and the element P are from the same reaction precursor, a nanocrystal of a nanocrystal core containing In, P and a metal element M can be prepared.

Abstract: Disclosed are a method for preparing a fluorescent nanomaterial-polymer composite and a wavelength converting element, and a light emitting device. The method for preparing the fluorescent nanomaterial-polymer composite includes: at least one precursor provided, the precursor includes a fluorescent nanomaterial and a polymer; and in a first temperature at or higher than a melting point of the polymer, the precursor is mixed, and then cooled.

Abstract: A liquid crystal display (LCD) device containing a layer of patterned photoluminescent nanoparticles, which can emit highly saturated color lights when excited with backlights, is disclosed in this invention. The patterned photoluminescent nanoparticle layer is disposed between the backlight and the liquid crystal. The display device can improve the light utilization efficiency for 3 times thus saving reduce the backlight power consumption to ? or being 3 times brighter at the same power consumption from conventional LCD displays. The display also can produce an ultra-wide color gamut up to 95% of the CIE 1976 color space or 165% of NTSC color gamut. The display is capable of switching between 2-dimensional and 3-dimensional viewing modes without any hardware structures changes applied.

Abstract: A liquid crystal display (LCD) device containing a layer of patterned photoluminescent nanoparticles, which can emit highly saturated color lights when excited with backlights, is disclosed in this invention. The patterned photoluminescent nanoparticle layer is disposed between the backlight and the liquid crystal. The display device can improve the light utilization efficiency for 3 times thus saving reduce the backlight power consumption to ? or being 3 times brighter at the same power consumption from conventional LCD displays. The display also can produce an ultra-wide color gamut up to 95% of the CIE 1976 color space or 165% of NTSC color gamut. The display is capable of switching between 2-dimensional and 3-dimensional viewing modes without any hardware structures changes applied.

Abstract: A nanocrystal preparation method comprises the following steps: dissolving, in a first selected solvent, a first precursor which is in a gaseous state under normal temperature and normal pressure, to form a first precursor solution; dissolving a second precursor in a second selected solvent to form a second precursor solution, wherein the second precursor is a precursor of a metal element of Group I, Group II, Group III or Group IV; and in an inert gas atmosphere, adding the first precursor solution into a reaction vessel which contains the second precursor solution, wherein the first precursor chemically reacts with the second precursor to generate a nanocrystal. The present invention further discloses a nanocrystal prepared by the above method and an apparatus for preparing and storing a gas-dissolved solution.

Abstract: A nanocrystal preparation method comprises the following steps: dissolving, in a first selected solvent, a first precursor which is in a gaseous state under normal temperature and normal pressure, to form a first precursor solution; dissolving a second precursor in a second selected solvent to form a second precursor solution, wherein the second precursor is a precursor of a metal element of Group I, Group II, Group III or Group IV; and in an inert gas atmosphere, adding the first precursor solution into a reaction vessel which contains the second precursor solution, wherein the first precursor chemically reacts with the second precursor to generate a nanocrystal. The present invention further discloses a nanocrystal prepared by the above method and an apparatus for preparing and storing a gas-dissolved solution.

Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.

Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.

Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.

Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.

Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.

Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.

Abstract: The present invention provides new compositions containing nearly monodisperse colloidal core/shell semiconductor nanocrystals with high photoluminescence quantum yields (PL QY), as well as other complex structured semiconductor nanocrystals. This invention also provides new synthetic methods for preparing these nanocrystals, and new devices comprising these compositions. In addition to core/shell semiconductor nanocrystals, this patent application also provides complex semiconductor nanostructures, quantum shells, quantum wells, doped nanocrystals, and other multiple-shelled semiconductor nanocrystals.