A kind of double excitation double emission phosphor and preparation method and application method thereof

A fluorescent powder and dual-emission technology, applied in luminescent materials, chemical instruments and methods, photovoltaic power generation, etc., can solve the problems of low photoresponse and low photoelectric conversion efficiency of Si-based thin-film solar cells
CN102268261AInactive Publication Date: 2011-12-07HUNAN NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN NORMAL UNIVERSITY
Publication Date
2011-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A kind of fluorescent powder is based on metal sulfoxide, Eu2+ and Cu2+ are co-activators, and other ions are sensitizers. aA, bB, cC, dD, eE. Among them: A is one or two of Y3+, La3+, Ce3+, Pr3+, Nd3+, Sm3+, Gd3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+, Yb3+, Lu3+; B is Bi3+, Sb3+, Mn2+, Pb2+ One or two; C is one or two of F-, Cl-, Br-, I-; D is one or two of Se2-, Te2-. E is one or more of Li+, Na+, K+, Rb+, Cs+, Ag+ and H3BO3. The phosphor has a broadband dual excitation spectrum and a broadband dual emission spectrum, the dual excitation band spectrum is located in the 200-425nm and 425-610nm area, and the dual emission band spectrum is located in the 400-550nm and 600-750nm area. Phosphors can be used in agricultural films, solar photovoltaic cells and LED devices.
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Description

technical field

[0001] The invention belongs to the technical field of luminescent materials, and relates to a double-excitation and double-emission fluorescent powder, a preparation method and an application method thereof. The excitation spectrum of the phosphor is in the ultraviolet and green light regions, and the emission spectrum is in the blue and red light regions. Background technique

[0002] The sun radiates about 3×10 24 The energy of J is 10,000 times the energy consumed by the earth every year. In the situation of the depletion of fossil energy and the aggravation of environmental pollution due to the use of fossil energy, more and more people pay more and more attention to the abundant and environmentally friendly solar energy.

[0003] Photovoltaic power generation is one of the main ways to utilize solar energy. Si wafers in polycrystalline silicon thin-film solar cells have a low response to light with wavelengths less than 500nm and greater than 850nm. ...

Claims

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