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Holmium-doped tungstate up-conversion luminescent material, preparation method and organic light-emitting diode

A luminescent material, tungstate technology, applied in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc., to achieve the effects of low cost, good crystallization, and mild conditions

Inactive Publication Date: 2014-12-03
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, holmium-doped tungstate upconversion luminescent materials that can be excited by long-wave radiation such as infrared, red and green light to emit blue light have not been reported yet.

Method used

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  • Holmium-doped tungstate up-conversion luminescent material, preparation method and organic light-emitting diode
  • Holmium-doped tungstate up-conversion luminescent material, preparation method and organic light-emitting diode
  • Holmium-doped tungstate 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 tungstate up-conversion luminescent material comprises the following steps;

[0029] Step S101, according to AgR 1-x (WO 4 ) 2 :xHo 3+ The stoichiometric ratio of each element weighs Ag 2 O, R 2 o 3 , WO 3 and Ho 2 o 3 Powder, wherein, x is 0.01-0.06.

[0030] Preferably, x is 0.03.

[0031] It can be understood that in this step, Ag can also be weighed according to the molar ratio 1: (0.94-0.99): 4: (0.01-0.03) 2 O, R 2 o 3 , WO 3 and Ho 2 o 3 Powder, among them, R 2 o 3 It is one of yttrium oxide, lanthanum oxide, gadolinium oxide and lutetium oxide.

[0032] Preferably, Ag can also be weighed according to the molar ratio of 1:0.97:4:0.03 in this step 2 O, R 2 o 3 , WO 3 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 0.5 mol / L˜3 mol / L.

[0034] The metal cation in the solution is Ag + ...

Embodiment 1

[0052] Weigh Ag 2 O, Y 2 o 3 , WO 3 and Ho 2 o 3 The molar numbers of the powders are 1mmol, 0.97mmol, 4mmol 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 it for 3 hours, and the calcining temperature is 1100°C to obtain AgY 0.97 (WO 4 ) 2 : 0.03Ho 3+ Up-converting phosphors.

[0053] Soda-lime glass is used for subs...

Embodiment 2

[0058] Weigh Ag 2 O, Y 2 o 3 , WO 3 and Ho 2 o 3 The molar numbers of the powders are 1mmol, 0.94mmol, 4mmol and 0.06mmol 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 powder, place it in a temperature-programmed furnace and calcinate it for 5 hours, and the calcining temperature is 1300°C to obtain AgY 0.94 (WO 4 ) 2 : 0.06Ho 3+ Up-converting phosphors.

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Abstract

A holmium-doped tungstate up-conversion luminescent material has the general chemical formula of AgR1-x(WO4)2:xHo<3+>, wherein x is 0.01-0.06; and R is an element selected from yttrium element, lanthanum element, gadolinium element and lutecium element. In the photoluminescence spectra of the holmium-doped tungstate up-conversion luminescent material, the holmium-doped tungstate up-conversion luminescent material can realize long-wave radiation excitation from infrared ray to green ray, and luminescence peaks at 490nm are respectively corresponding to luminescence peaks formed by transition radiation of Ho<3+> ion from <5>F3 to <5>I8. The invention also provides a preparation method of the holmium-doped tungstate up-conversion luminescent material and an organic light-emitting diode with the application of the holmium-doped tungstate up-conversion luminescent material.

Description

technical field [0001] The invention relates to a holmium-doped tungstate 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, holmium-doped tungstate up-conversion luminescent materia...

Claims

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Application Information

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IPC IPC(8): C09K11/78C09K11/68H01L51/54
Inventor 周明杰王平陈吉星冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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