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Nd/Yb-codoped alkaline earth sulfide up-conversion luminescent material as well as preparation method and application thereof

A technology of luminescent materials and co-doping, which is applied in the fields of luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Inactive Publication Date: 2015-03-25
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, Nd-Yb co-doped alkaline earth sulfide up-conversion 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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  • Nd/Yb-codoped alkaline earth sulfide up-conversion luminescent material as well as preparation method and application thereof
  • Nd/Yb-codoped alkaline earth sulfide up-conversion luminescent material as well as preparation method and application thereof
  • Nd/Yb-codoped alkaline earth sulfide up-conversion luminescent material as well as preparation method and application thereof

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preparation example Construction

[0028] The preparation method of the above-mentioned neodymium and ytterbium co-doped alkaline earth sulfide up-conversion luminescent material comprises the following steps:

[0029] Step S11, according to RS: xYb 3+ ,yNd 3+ The stoichiometric ratio of each element is called RS, Yb 2 S 3 and Nd 2 S 3 Powder, wherein x is 0.005-0.05, y is 0.002-0.03, and R is at least one of magnesium, calcium, strontium and barium.

[0030] In this step, the RS, Yb 2 S 3 and Nd 2 S 3 The molar ratio of each component of the powder is (92-99.3): (0.5-5): (0.2-3).

[0031] In this step, preferably RS, Yb 2 S 3 and Nd 2 S 3 The molar ratio of each component of the powder is 96:3:1.

[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 corundum bowl for 20 minutes to 60 minutes to obtain a uniformly mixed precursor, preferably for 40 minutes.

[0034] Step S15, burning the precursor at 800° C. to 100...

Embodiment 1

[0043] Select powder with a purity of 99.99%, mix MgS, Yb 2S 3 and Nd 2 S 3 Each component of the powder is 0.96mmol, 0.03mmol and 0.01mmol in molarity, 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, then cool it down to 250°C and keep it warm After 2 hours, cool down 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 MgS: ​​0.03Yb 3+ , 0.01Nd 3+ Up-converting phosphors.

[0044] The process of making organic light-emitting diodes

[0045] 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 encapsulation layer 5 is polytetrafluoroethylene. The transparent enca...

Embodiment 2

[0050] Select powder with a purity of 99.99%, mix MgS, Yb 2 S 3 and Nd 2 S 3 Each component of the powder is 0.965mmol, 0.005mmol and 0.03mmol in moles, grind it in a corundum mortar for 20 minutes to mix it evenly, then burn it in a muffle furnace at 800°C for 3 hours, then cool it down to 100°C and keep it warm After 3 hours, cool down 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 MgS: ​​0.005Yb 3+ , 0.03Nd 3+ up-converting phosphors.

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Abstract

The invention discloses a Nd / Yb-codoped alkaline earth sulfide up-conversion luminescent material having a chemical formula of RS:xYb<3+>, yNd<3+>, wherein x is between 0.005 and 0.05, y is between 0.002 and 0.03, R is at least one of Mg, Ca, Sr and Ba. In the electroluminescence (EL) spectrum of the Nd / Yb-codoped alkaline earth sulfide up-conversion luminescent material, the excitation wavelength of the Nd / Yb-codoped alkaline earth sulfide up-conversion luminescent material is 586nm, a light emission peak is formed by transition radiation of Nd<3+> ion <2>P3 / 2-><4>I15 / 2 in a 469nm wavelength region, and therefore the Nd / Yb-codoped alkaline earth sulfide up-conversion luminescent material can be used as a blue light emitting material. The invention further provides a preparation method of the Nd / Yb-codoped alkaline earth sulfide up-conversion luminescent material and an organic light emitting diode using the Nd / Yb-codoped alkaline earth sulfide up-conversion luminescent material.

Description

technical field [0001] The invention relates to a neodymium-ytterbium co-doped alkaline earth sulfide 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 Nd-Yb co-doped alkaline e...

Claims

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Application Information

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IPC IPC(8): C09K11/56H01L51/54
Inventor 周明杰陈吉星王平钟铁涛
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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