Manganese-doped metal sulfide red fluorescent powder and preparation method thereof

A metal sulfide, red phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of increasing the cost of related chips, difficulty in rare earth purification, short excitation wavelength, etc., and achieve easy operation, low cost, and equipment. simple effect

Inactive Publication Date: 2016-06-22
SUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, most oxides are broadband semiconductors, which require higher excitation energy to achieve luminescence of doped ions, which greatly increases the cost of related chips (the higher the excitation energy, the shorter the excitation wavelength, and the higher the price of the chip used)
In addition, due to the scarcity and difficulty in purification of rare earths, the application cost of red phosphors using rare earths as luminescent ions is relatively high

Method used

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  • Manganese-doped metal sulfide red fluorescent powder and preparation method thereof
  • Manganese-doped metal sulfide red fluorescent powder and preparation method thereof
  • Manganese-doped metal sulfide red fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Preparation of Mn 1 Cd 6 In 28 S 52 (SH) 4 ·[H + -DBN] 8 ·[H + -PR] 4

[0032] Weigh 80 mg of indium powder, cadmium nitrate (Cd(NO 3 ) 2 4H 2 O) 40 mg, manganese acetate (Mn(Ac) 2 4H 2 (2) 5 milligrams, 120 milligrams of sulfur powders join in the polytetrafluoroethylene reactor liner, then measure piperidine (PR) 1.2 milliliters respectively, 1,8-diazabicycloundec-7-ene ( DBN) 1 ml, water 1 ml was added to the above liner. The solid-liquid mixture was stirred for 30 minutes, and then the lining of the reaction kettle was put into a stainless steel reaction kettle, sealed and heated to 190°C for 3 days. After the reaction kettle was cooled down, ethanol was added to the reaction product for multiple times of ultrasonic treatment until the solution in the upper layer of the sample was clarified, and then dried by suction filtration to obtain a crystalline manganese-doped metal sulfide red phosphor.

[0033] See attached figure 1 , which is the X-ray powd...

Embodiment 2

[0038] Preparation of Mn 1 Zn 6 In 28 S 52 (SH) 4 ·[H + -DBN] 8 ·[H + -PR] 4

[0039] Weigh 80 mg of indium powder, zinc acetate (Zn(Ac) 2 2H 2 O) 40 mg, manganese acetate (Mn(Ac) 2 4H 2 O) 5 milligrams, 120 milligrams of sulfur powders are added in the liner of polytetrafluoroethylene reactor, then measure respectively 1.2 milliliters of piperidine (PR), 1,8-diazabicycloundec-7-ene (DBN ) 1 ml and 1 ml of water were added to the above lining. The solid-liquid mixture was stirred for 30 minutes, and then the lining of the reaction kettle was put into a stainless steel reaction kettle, sealed and heated to 190°C for 3 days. After the reaction kettle was cooled down, ethanol was added to the reaction product, and the solution in the upper layer of the sample was sonicated several times until the solution in the upper layer of the sample was clarified, and dried by suction filtration to obtain a crystalline manganese-doped metal sulfide red phosphor.

[0040] See at...

Embodiment 3

[0045] Preparation of Mn 7 In 28 S 52 (SH) 4 ·[H + -DBN] 8 ·[H + -PR] 4

[0046] Weigh 80 mg of indium powder, manganese acetate (Mn(Ac) 2 4H 2 (O) 40 milligrams, 120 milligrams of sulfur powders were added in the polytetrafluoroethylene reactor liner, then measured respectively 1.2 milliliters of piperidine (PR), 1,8-diazabicycloundec-7-ene (DBN ) 1 ml and 1 ml of water were added to the above lining. The solid-liquid mixture was stirred for 30 minutes, and then the lining of the reaction kettle was put into a stainless steel reaction kettle, sealed and heated to 190°C for 3 days. After the reaction kettle was cooled down, ethanol was added to the inner lining of the reaction kettle, and the solution in the upper layer of the sample was sonicated several times until the solution in the upper layer of the sample was clarified, and dried by suction filtration to obtain a crystalline manganese-doped metal sulfide red phosphor.

[0047] See attached Figure 9 , which ...

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Abstract

The invention discloses a manganese-doped metal sulfide red fluorescent powder and a preparation method thereof. The chemical formula of MnxM[7-x]In28S52(SH)4.[H<+>-DBN]8.[H<+>-PR]4, wherein M is Cd<2+> or Zn<2+>, DNB is 1,8-diazadicycloundecylenic-7-ene, and the molecular formula is C7H12N2; PR is piperidine of which the molecular formula is C5H11N; and x is the doping amount of manganese, and 0< x<=7. The manganese-doped metal sulfide red fluorescent powder is prepared by a solvothermal process. Under the excitation of 350-550nm light, the fluorescent powder can emit red fluorescence of which the central wavelength is 610-650nm, and the fluorescent powder has high luminescent intensity. Compared with the traditional red fluorescent powder synthesis process, the preparation method disclosed by the invention has the advantages of simple equipment, mild reaction conditions, high preparation speed and economical raw materials; the reaction temperature does not need to achieve 1000 DEG C; and the method does not use any rare earth ion, does not need any shielding gas during reaction, and thus, is suitable for industrial production.

Description

technical field [0001] The invention relates to a fluorescent luminescent material, in particular to a fluorescent powder which emits red fluorescent light under the excitation of near-ultraviolet to blue-green light and a preparation method thereof, which belongs to the technical field of luminescent materials. technical background [0002] With the invention of low-energy light-emitting diodes (LightEmittingDiode), incandescent lamps and fluorescent lamps commonly used in the lighting field are gradually being replaced by LED lamps. Commercial white LED lamps are mainly composed of blue LED chips and Y 3 al 5 o 12 : Ce 3+ Composite fluorescent powder. Although the combination of blue light and yellow light can achieve white light emission, the lack of red light emitters makes commercial LED lights insufficient in color rendering performance. Introducing phosphors with red luminescent properties into the mixed light system of blue light and yellow light is an effective...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
CPCC09K11/06C09K2211/1029C09K2211/1044
Inventor 吴涛林坚颜文波伏志省朱宇嘉
Owner SUZHOU UNIV
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