An LED illuminating device and a preparation method therefor. The device is characterized by comprising an LED component (101), an LED circuit board (100), a heat dissipator (200), and a power supply controller (400). The LED component (101) is disposed on the LED circuit board (100), the LED circuit board (100) is disposed above the heat dissipator (200), and the power supply controller (400) is connected to the LED circuit board (100) by means of a conductive wire. The LED illuminating device can emit approximate natural light.

A device including an LED light source optically coupled to a green-emitting U.sup.6+-doped phosphor having a composition selected from the group consisting of U.sup.6+-doped phosphate-vanadate phosphors, U.sup.6+-doped halide phosphors, U.sup.6+-doped oxyhalide phosphors, U.sup.6+-doped silicate-germanate phosphors, U.sup.6+-doped alkali earth oxide phosphors, and combinations thereof, is presented. The U.sup.6+-doped phosphate-vanadate phosphors are selected from the group consisting of compositions of formulas (A1)-(A12). The U.sup.6+-doped halide phosphors are selected from the group consisting of compositions for formulas (B1)-(B3). The U.sup.6+-doped oxyhalide phosphors are selected from the group consisting of compositions of formulas (C1)-(C5). The U.sup.6+-doped silicate-germanate phosphors are selected from the group consisting of compositions of formulas (D1)-(D11). The U.sup.6+-doped alkali earth oxide phosphors are selected from the group consisting of formulas (E1)-(E11).

A device including an LED light source optically coupled to a green-emitting U.sup.6+-doped phosphor having a composition selected from the group consisting of U.sup.6+-doped phosphate-vanadate phosphors, U.sup.6+-doped halide phosphors, U.sup.6+-doped oxyhalide phosphors, U.sup.6+-doped silicate-germanate phosphors, U.sup.6+-doped alkali earth oxide phosphors, and combinations thereof, is presented. The U.sup.6+-doped phosphate-vanadate phosphors are selected from the group consisting of compositions of formulas (A1)-(A12). The U.sup.6+-doped halide phosphors are selected from the group consisting of compositions for formulas (B1)-(B3). The U.sup.6+-doped oxyhalide phosphors are selected from the group consisting of compositions of formulas (C1)-(C5). The U.sup.6+-doped silicate-germanate phosphors are selected from the group consisting of compositions of formulas (D1)-(D11). The U.sup.6+-doped alkali earth oxide phosphors are selected from the group consisting of formulas (E1)-(E11).

A device including an LED light source optically coupled to a green-emitting U.sup.6+-doped phosphor having a composition selected from the group consisting of U.sup.6+-doped phosphate-vanadate phosphors, U.sup.6+-doped halide phosphors, U.sup.6+-doped oxyhalide phosphors, U.sup.6+-doped silicate-germanate phosphors, U.sup.6+-doped alkali earth oxide phosphors, and combinations thereof, is presented. The U.sup.6+-doped phosphate-vanadate phosphors are selected from the group consisting of compositions of formulas (A1)-(A12). The U.sup.6+-doped halide phosphors are selected from the group consisting of compositions for formulas (B1)-(B3). The U.sup.6+-doped oxyhalide phosphors are selected from the group consisting of compositions of formulas (C1)-(C5). The U.sup.6+-doped silicate-germanate phosphors are selected from the group consisting of compositions of formulas (D1)-(D11). The U.sup.6+-doped alkali earth oxide phosphors are selected from the group consisting of formulas (E1)-(E11).

A device including an LED light source optically coupled to a green-emitting U.sup.6+-doped phosphor having a composition selected from the group consisting of U.sup.6+-doped phosphate-vanadate phosphors, U.sup.6+-doped halide phosphors, U.sup.6+-doped oxyhalide phosphors, U.sup.6+-doped silicate-germanate phosphors, U.sup.6+-doped alkali earth oxide phosphors, and combinations thereof, is presented. The U.sup.6+-doped phosphate-vanadate phosphors are selected from the group consisting of compositions of formulas (A1)-(A12). The U.sup.6+-doped halide phosphors are selected from the group consisting of compositions for formulas (B1)-(B3). The U.sup.6+-doped oxyhalide phosphors are selected from the group consisting of compositions of formulas (C1)-(C5). The U.sup.6+-doped silicate-germanate phosphors are selected from the group consisting of compositions of formulas (D1)-(D11). The U.sup.6+-doped alkali earth oxide phosphors are selected from the group consisting of formulas (E1)-(E11).

In the present disclosure embodiments, a phosphate phosphor including an activation center of trivalent chromium and a light emitting device are provided. The light emitting device includes a light source and the above mentioned phosphate phosphor, such that the phosphate phosphor is excited by the light source and emits a wide spectrum of the infrared light. The light emitting device with wide emission spectrum of the infrared light may be widely applied in detecting devices.

The present invention relates to compounds and their nonlinear optical (NLO) crystals of A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4), their producing method and uses thereof. The series of compounds have a chemical formula of A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4), which are namely K.sub.3B.sub.11P.sub.2O.sub.23, Rb.sub.3B.sub.11P.sub.2O.sub.23, Cs.sub.3B.sub.11P.sub.2O.sub.23 and (NH.sub.4).sub.3B.sub.11P.sub.2O.sub.23. The series of NLO crystals having the chemical formula of A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4), belong to rhombohedral crystal system, and have a space group of R3, crystal cell parameters of a=b=10.016(5)-12.591(5) , c=12.105(6)-14.905(6) , Z=3. A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4) compounds were prepared by a solid-state reaction method or a hydrothermal method, and A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4) NLO crystals were prepared by a high-temperature solid-state reaction method, a hydrothermal method, or a solution method. T They meet the requirements for the frequency conversion of UV wavelength lasers and could be used to prepare nonlinear optical devices.

The present invention relates to compounds and their nonlinear optical (NLO) crystals of A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4), their producing method and uses thereof. The series of compounds have a chemical formula of A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4), which are namely K.sub.3B.sub.11P.sub.2O.sub.23, Rb.sub.3B.sub.11P.sub.2O.sub.23, Cs.sub.3B.sub.11P.sub.2O.sub.23 and (NH.sub.4).sub.3B.sub.11P.sub.2O.sub.23. The series of NLO crystals having the chemical formula of A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4), belong to rhombohedral crystal system, and have a space group of R3, crystal cell parameters of a=b=10.016(5)-12.591(5) , c=12.105(6)-14.905(6) , Z=3. A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4) compounds were prepared by a solid-state reaction method or a hydrothermal method, and A.sub.3B.sub.11P.sub.2O.sub.23 (A=K, Rb, Cs, NH.sub.4) NLO crystals were prepared by a high-temperature solid-state reaction method, a hydrothermal method, or a solution method. T They meet the requirements for the frequency conversion of UV wavelength lasers and could be used to prepare nonlinear optical devices.

A quantum dot-polymer composite including a polymer matrix; and core-shell quantum dots dispersed in the polymer matrix, wherein the core-shell quantum dots include a semiconductor nanocrystal core including indium, zinc, and phosphorus and a semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core, the shell including zinc, selenium, and sulfur. The core-shell quantum dots do not include cadmium, the core-shell quantum dots are configured to emit green light, the core-shell quantum dots have a mole ratio of phosphorus to indium of greater than or equal to about 0.75, and the core-shell quantum dots have a mole ratio of zinc to indium of greater than or equal to about 35, and a method of producing the core-shell quantum dots, and a display device including a light emitting element that includes the quantum dot-polymer composite.

A cadmium-free, core shell quantum dot, a quantum dot polymer composite, and electronic devices including the quantum dot polymer composite. The core shell quantum dot has an extinction coefficient per gram of greater than or equal to 0.3, an ultraviolet-visible absorption spectrum curve that has a positive differential coefficient value at 450 nm, wherein the core shell quantum dot includes a semiconductor nanocrystal core including indium and phosphorus, and optionally zinc, and a semiconductor nanocrystal shell disposed on the semiconductor nanocrystal core, the shell including zinc, selenium, and sulfur, wherein the core shell quantum dot has a quantum efficiency of greater than or equal to about 80%, and is configured to emit green light upon excitation.