Terbium/ytterbium-codoped alkali gallium tungstate up-conversion luminescent material, preparation method and application thereof

A luminescent material, co-doping technology, applied in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Inactive Publication Date: 2015-05-27
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, terbium-ytterbium co-doped alkali gallium tungstate upconversion luminescent materials that can be excited by long-wave radiation such as infrared and red-green light to emit blue light have not been reported yet.

Method used

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  • Terbium/ytterbium-codoped alkali gallium tungstate up-conversion luminescent material, preparation method and application thereof
  • Terbium/ytterbium-codoped alkali gallium tungstate up-conversion luminescent material, preparation method and application thereof
  • Terbium/ytterbium-codoped alkali gallium tungstate up-conversion luminescent material, preparation method and application thereof

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Experimental program
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preparation example Construction

[0028] The preparation method of the above-mentioned terbium-ytterbium co-doped alkali gallium tungstate up-conversion luminescent material comprises the following steps:

[0029] Step S11, R 2 Ga 2 WO 7 :xTb 3+ ,yYb 3+ The stoichiometric ratio of each element is called R 2 CO 3 , Ga 2 o 3 , WO 3 , Tb 2 o 3 and Yb 2 o 3 Powder, wherein, x is 0.01-0.05, y is 0.01-0.1, R 2 CO 3 At least one selected from lithium carbonate, sodium carbonate, potassium carbonate, rubidium carbonate and strontium carbonate.

[0030] In this step, the R 2 CO 3 , Ga 2 o 3 , WO 3 , Tb 2 o 3 and Yb 2 o 3 The molar ratio of each component of the powder is 1:1:1:(0.01~0.05):(0.01~0.1).

[0031] In this step, preferably, R 2 CO 3 , Ga 2 o 3 , WO 3 , Tb 2 o 3 and Yb 2 o 3 The molar ratio of each component of the powder is 1:1:1:0.03:0.05.

[0032] Step S13, mixing the powder weighed in step S11 evenly to obtain a precursor.

[0033] In this step, the powder is ground in a...

Embodiment 1

[0042] The powder with a purity of 99.99% is selected, and the Li 2 CO 3 , Ga 2 o 3 , WO 3 , Tb 2 o 3 and Yb 2 o 3 The powder, according to the number of moles, is 1mmol, 1mmol, 1mmol, 0.03mmol and 0.05mmol. Grind it in a corundum mortar for 40 minutes to mix it evenly, then burn it in a muffle furnace at 950°C for 3 hours, and then cool it to 250°C Keep it warm for 2 hours, then take it out with the furnace cooling to room temperature to obtain a bulk material, which can be crushed to obtain the general chemical formula Li 2 Ga 2 WO 7 : 0.03Tb 3+ ,0.05Yb 3+ Up-converting phosphors.

[0043] The process of making organic light-emitting diodes

[0044] The sequentially stacked substrate 1 uses soda-lime glass, the cathode 2 uses a metal Ag layer, and the organic light-emitting layer 3 uses Ir(piq)2(acac), the Chinese name is bis(1-phenyl-isoquinoline)(acetylacetonate) iridium (III), the transparent anode 4 uses indium tin oxide ITO, and the transparent encapsulati...

Embodiment 2

[0049] The powder with a purity of 99.99% is selected, and the Li 2 CO 3 , Ga 2 o 3 , WO 3 , Tb 2 o 3 and Yb 2 o 3 Powder, according to the number of moles: 1mmol, 1mmol, 1mmol, 0.01mmol and 0.01mmol, grind in a corundum mortar for 20 minutes to mix evenly, then burn in a muffle furnace at 800°C for 3 hours, and then cool to 250°C Insulate for 0.5 hours, then cool to room temperature with the furnace and take it out to obtain a bulk material. After crushing, the general chemical formula can be obtained as Li 2 Ga 2 WO 7 : 0.01Tb 3+ ,0.01Yb 3+ up-converting phosphors.

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Abstract

The invention relates to a terbium / ytterbium-codoped alkali gallium tungstate up-conversion luminescent material, which comprises a following general chemical formula of R2Ga2WO7: xTb<3+>, yYb<3+>, wherein x is 0.01-0.05, y is 0.01-0.1, and R is at least one from lithium element, sodium element, potassium element, rubidium element and strontium element. In a photoluminescence spectrum of the terbium / ytterbium-codoped alkali gallium tungstate up-conversion luminescent material, the excitation wavelength of the terbium / ytterbium-codoped alkali gallium tungstate up-conversion luminescent material is 980nm, a luminescence peak is formed by transition radiation of Tb<3+>ion 5D4-7H6 in a 485nm wavelength zone, and the luminescent material can be taken as a blue light luminescent material. The invention also provides a preparation method of the terbium / ytterbium-codoped alkali gallium tungstate up-conversion luminescent material and an organic light-emitting diode by using the terbium / ytterbium-codoped alkali gallium tungstate up-conversion luminescent material.

Description

technical field [0001] The invention relates to a terbium-ytterbium co-doped alkali gallium 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, terbium-ytterbium co-doped al...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/68H01L51/54
Inventor 周明杰陈吉星王平黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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