47results about How to "Improve up-conversion luminous efficiency" patented technology

The invention discloses a fluosilicate based up-conversion luminescence ceramic material and a preparation method thereof; the general chemical formula of the ceramic material is Ca10-10xEr10xYb10ySi3O15F2, wherein x is Er3+ doped chemical metering percent, y is ytterbium ion Yb+3 mixed chemical metering percent, 0.001 is not more than x+y< 0.2. The up-conversion luminescence ceramic material prepared by the method is stable in crystal structure, uniform in grain diameter size, and stable in lighting performance; under the excitation of 976 nanometer infrared laser, a red lighting peak is appeared in the vicinity of 670 nanometer, and the lighting purity is high, and the up-conversion efficiency is high. For the matrix structure is stable and the doped rare earth concentration is high, the ceramic material is good for enhancing the lighting efficiency and realizing the excitation under a high power. In preparation, the compounds containing elements required by compounding lighting materials are mixed at ratio, the ceramic material is prepared by a high-temperature solid phase method; the preparation method is simple in technique, rich in raw material source, and low in price; moreover, the technique process is free from waste water and waste gas, and is toxic-free and environment-friendly; the fluosilicate based up-conversion luminescence ceramic material is further popularized and used.

The invention relates to a titanium-aluminate-based up-conversion luminescent material, a preparation method and an application, and belongs to the technical field of inorganic luminescent materials. The chemical formula is: Ba 4(1‑x‑y) Er x Yb y Ti 10 Al 2 o 27 , where x is Er 3+ The stoichiometric fraction of doping, y is the ytterbium ion Yb 3+ The stoichiometric fraction of doping, 0.001≤x+y≤0.2, can be prepared by simple high-temperature solid-phase method and sol-gel method. Under the excitation of 976nm infrared laser, the present invention has yellow-green luminous peaks near the wavelengths of 550nm and 660nm, the matrix structure is stable, and the concentration of doped rare earth is high, which is beneficial to enhance the luminous efficiency and realize the excitation under high power, and the up-conversion efficiency High; the prepared up-conversion luminescent material has a uniform particle size, is innovative and has good repeatability, and can be widely used in infrared radiation detection, optical fiber communication technology, fiber amplifier, three-dimensional display, biomolecular fluorescent labeling and other fields. The preparation method of the invention is simple, the cost is low, the raw material supply is unlimited, and the operation and industrial production are easy.