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

Inactive Publication Date: 2011-12-07
HUNAN NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Si wafers in polycrystalline silicon thin-film solar cells have a low response to light with wavelengths less than 500nm and greater than 850nm. This part of sunlight cannot be absorbed by Si wafers, so the photoelectric conversion efficiency of Si-based thin-film solar cells is low.

Method used

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

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example 1

[0014] Example 1: Ca 0.95 ZnO 0.95 f 0.05 S 0.9 Se 0.1 :0.03% 2+ , 0.1% 2+ , 0.05Li +

[0015] The product is synthesized by high temperature solid phase reaction. Weigh CaCO according to stoichiometric ratio 3 9.5g, ZnS 9.7g, Se powder 0.789g, Eu 2 o 3 5.28mg, CuO 7.95mg, LiF 1.297g, H 3 BO 3 0.2g. After the ingredients are ground, put them into a quartz crucible, push the crucible into a tube-type high-temperature furnace, and seal it. First pass nitrogen to drive away the air in the high-temperature furnace, then pass into nitrogen and hydrogen (95% N 2 +5%H 2 ) mixed gas, the temperature was programmed to rise to 1100°C for 8 hours. Heating was then stopped, and nitrogen was continued to cool to room temperature. The product was taken out, washed three times with deionized water, and dried to obtain the phosphor product.

[0016] The characteristic excitation and emission spectra of phosphors are as figure 1 shown. Phosphor powder can convert ultraviole...

example 2

[0017] Example 2: CaZnOS: 0.008% Eu 2+ , 0.1% Cu 2+

[0018] The product is synthesized by high temperature solid phase reaction. Weigh CaCO according to stoichiometric ratio 3 10.0g, ZnS 9.75g, Eu 2 o 3 1.41mg, CuO 7.95mg, H 3 BO 3 0.2g. After the ingredients are ground, put them into a quartz crucible, push the crucible into a tube-type high-temperature furnace, and seal it. First pass nitrogen to drive away the air in the high-temperature furnace, then pass into nitrogen and hydrogen (95% N 2 +5%H 2 ) mixed gas, the temperature was programmed to burn at 1000°C for 9 hours. Heating was then stopped, and nitrogen was continued to cool to room temperature. The product was taken out, washed three times with deionized water, and dried to obtain the phosphor product. Under excitation at 330nm, the phosphor simultaneously emits blue-green and red light (such as figure 2 shown), compounded to obtain white light emission, the color coordinates are (0.330, 0.284), which...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/56C08K3/30H01L31/048H01L33/50H01L31/055
CPCY02E10/50Y02B20/181Y02B20/00Y02E10/52
Inventor 廉世勋邱忠贤荣春英
Owner HUNAN NORMAL UNIVERSITY
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