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Holmium doped oxygen yttrium silicate up-conversion luminescent material, preparation method, and organic light emitting diode

A technology of yttrium oxysilicate and luminescent materials, which is applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., to achieve the effects of complete crystallization, mild conditions, and low synthesis temperature

Inactive Publication Date: 2014-12-17
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the holmium-doped yttrium oxysilicate up-conversion luminescent material that can be excited by long-wave radiation such as infrared and red-green light to emit blue light has not been reported yet.

Method used

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  • Holmium doped oxygen yttrium silicate up-conversion luminescent material, preparation method, and organic light emitting diode
  • Holmium doped oxygen yttrium silicate up-conversion luminescent material, preparation method, and organic light emitting diode
  • Holmium doped oxygen yttrium silicate up-conversion luminescent material, preparation method, and organic light emitting diode

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preparation example Construction

[0028] The preparation method of the above-mentioned holmium-doped yttrium oxysilicate up-conversion luminescent material comprises the following steps;

[0029] Step S101, according to Me 2 Y 8 (SiO 4 ) 6 o 2 :xHo 3+ The stoichiometric ratio of each element is weighed as MeO, Y 2 o 3 , SiO and Ho 2 o 3 Powder, wherein, x is 0.01-0.06, and R is one of magnesium element, calcium element, strontium element and barium element.

[0030] Preferably, x is 0.03.

[0031] It can be understood that in this step, MeO, Y can also be weighed according to the molar ratio of 2:4:6: (0.01-0.08) 2 o 3 , SiO and Ho 2 o 3 Powder, wherein MeO is one of magnesium oxide, calcium oxide, strontium oxide and barium oxide.

[0032] Preferably, in this step, MeO, Y can also be weighed according to the molar ratio of 2:4:6:0.03 2 o 3 , SiO and Ho 2 o 3 Powder.

[0033] Step S102 , dissolving the weighed powder in nitric acid to prepare a solution with a metal cation concentration of 0...

Embodiment 1

[0052] Weigh MgO, Y 2 o 3 , SiO and Ho 2 o 3 The molar numbers of the powders are 2mmol, 4mmol, 6mmol and 0.03mmol respectively, which are dissolved in nitric acid to prepare a 1.5mol / L solution, and 0.01mol / L polyethylene glycol additive is added. Then put the solution into the atomization device, and then feed 5 L / min of argon gas into the atomization device. The solution precursor enters a quartz tube with a temperature of 180°C along with the argon carrier gas to generate the precursor, wherein the diameter of the quartz tube is 95mm and the length is 1.4m. Then the phosphor enters the condenser along with the airflow, and is finally collected by the microporous acid-resistant filter funnel. Collect the precursor of the phosphor powder, place it in a temperature-programmed furnace and calcinate for 3 hours at a calcining temperature of 1100°C to obtain Mg 2 Y 8 (SiO 4 ) 6 o 2 : 0.03Ho 3+ Up-converting phosphors.

[0053] The sequentially stacked substrate 1 uses...

Embodiment 2

[0058] Weigh MgO, Y 2 o 3 , SiO and Ho 2 o 3 The molar numbers of the powders are 2mmol, 4mmol, 6mmol and 0.01mmol respectively, which are dissolved in nitric acid to prepare a 3mol / L solution, and 0.05mol / L polyethylene glycol additive is added. Then put the solution into the atomization device, and then pass 1 L / min of argon gas into the atomization device. The solution precursor enters a quartz tube with a temperature of 220°C along with the argon carrier gas to generate the precursor, wherein the diameter of the quartz tube is 150mm and the length is 3m. Then the phosphor enters the condenser along with the airflow, and is finally collected by the microporous acid-resistant filter funnel. Collect the precursor of the phosphor, place it in a temperature-programmed furnace and calcinate it for 5 hours at a calcining temperature of 1300°C to obtain Mg 2 Y 8 (SiO 4 ) 6 o 2 : 0.01Ho 3+ Up-converting phosphors.

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Abstract

The invention discloses a holmium doped oxygen yttrium silicate up-conversion luminescent material, which is represented by a chemical formula: Me2Y8(SiO4)6O2:xHo3+, wherein x is in a range of 0.01 to 0.06, and Me represents a magnesium element, a calcium element, a strontium element, or a barium element. In the photoluminescence spectrum of the holmium doped oxygen yttrium silicate up-conversion luminescent material, the material can achieve long wave radiation excitation from the infrared to the green light, and the luminescence peak at 490 nm is corresponding to the luminescence peak formed by the transition radiation of Ho3+ ions from 5F3 to 5I8. The invention also provides a preparation method of the up-conversion luminescent material, and an organic light emitting diode using the up-conversion luminescent material.

Description

technical field [0001] The invention relates to a holmium-doped yttrium oxysilicate up-conversion luminescent material, a preparation method and an organic light-emitting diode. Background technique [0002] Organic light-emitting diodes (OLEDs) have been widely used due to their simple component structure, cheap production cost, self-luminescence, short response time, and bendability. However, it is difficult to obtain stable and efficient OLED blue light materials, which greatly limits the development of white light OLED devices and light source industries. [0003] Up-conversion fluorescent materials can emit visible light and even ultraviolet light under the excitation of long-wave (such as infrared) radiation, and have broad application prospects in the fields of optical fiber communication technology, fiber amplifier, three-dimensional display, biomolecular fluorescent labeling, and infrared radiation detection. However, the holmium-doped yttrium oxysilicate up-conver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79H01L51/54
Inventor 周明杰陈吉星王平冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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