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Holmium-doped yttrium oxysulfide up-conversion luminescent material as well as preparation method and application thereof

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

Active Publication Date: 2013-04-17
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the holmium-doped yttrium oxysulfide 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 yttrium oxysulfide up-conversion luminescent material as well as preparation method and application thereof
  • Holmium-doped yttrium oxysulfide up-conversion luminescent material as well as preparation method and application thereof
  • Holmium-doped yttrium oxysulfide up-conversion luminescent material as well as preparation method and application thereof

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preparation example Construction

[0023] The preparation method of the above-mentioned holmium-doped yttrium oxysulfide up-conversion luminescent material comprises the following steps:

[0024] Step S11, weighing Y 2 o 3 、Ho 2 o 3 , refers to sulfur (S) and Na 2 CO 3 Powder, where Y 2 o 3 、Ho 2 o 3 , S, Na 2 CO 3 The molar ratio is (0.95~0.99):(0.01~0.05):1:1.5.

[0025] In this step, Y 2 o 3 、Ho 2 o 3 , S, Na 2 CO 3 The molar ratio is 0.97:0.03:1:1.5.

[0026] Step S13, mixing the powder weighed in step S11 evenly to obtain a precursor.

[0027] In this step, the powder is ground in a corundum bowl for 20 minutes to 60 minutes to obtain a homogeneously mixed precursor, preferably for 40 minutes.

[0028] Step S15 , under a reducing atmosphere, burn the precursor at 800° C. to 1000° C. for 0.5 to 5 hours, then cool to 100° C. to 500° C., and keep warm for 0.5 to 3 hours to obtain a powder product.

[0029] Preferably, the precursor is fired at 800° C. for 3 hours.

[0030] Preferably, it ...

Embodiment 1

[0040] Choose powder with a purity of 99.99%, Y 2 o 3 , Ho 2 o 3 , elemental S and Na 2 CO 3 Flux powder, its mass is 2.318g, 0.189g, 1.074g, 0.836g respectively. Grind them in a corundum mortar for 40 minutes to make them evenly mixed, and then burn for 3 hours at 800°C in argon-hydrogen mixed gas containing 5% hydrogen as a protective gas. Then cool to 250°C and keep it warm for 2 hours, then naturally cool to room temperature, take out the powder, soak in hot dilute hydrochloric acid for 1 hour, then rinse with deionized water until neutral, filter and dry to obtain the final phosphor.

[0041] see figure 2 , figure 2 Shown is the photoluminescence spectrum of the obtained holmium-doped yttrium oxysulfide up-conversion luminescent material. Depend on figure 2 It can be seen that the excitation wavelength of the holmium-doped yttrium oxysulfide up-conversion luminescent material obtained in this embodiment is 640nm, and in the 490nm wavelength region by Ho 3+ io...

Embodiment 2

[0044] Choose powder with a purity of 99.99%, Y 2 o 3 , Ho 2 o 3 , elemental S and Na 2 CO 3 Flux powder, its mass is 2.196g, 0.378g, 1.103g, 0.858g respectively. Grind in a corundum mortar for 20 minutes to make them evenly mixed, and then burn for 5 hours at 500°C in argon-hydrogen mixed gas containing 5% hydrogen as a protective gas. Then cool to 100°C and keep it warm for 0.5 hours, then naturally cool to room temperature, take out the powder, soak in hot dilute hydrochloric acid for 1 hour, then rinse with deionized water until neutral, filter and dry to obtain the final phosphor.

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Abstract

The invention relates to a holmium-doped yttrium oxysulfide up-conversion luminescent material which has a chemical formula of Y2O2S:xHo<3+>, wherein x is more than or equal to 0.01 and less than or equal to 0.05. In a photoluminescence spectrum of the holmium-doped yttrium oxysulfide up-conversion luminescent material, the excitation wavelength of the holmium-doped yttrium oxysulfide up-conversion luminescent material is 640nm, a luminescent peak is formed by transition radiation of Ho<3+> ions 5F3->5I8 in a 490nm wavelength area, and the holmium-doped yttrium oxysulfide up-conversion luminescent material can be used as a blue light emitting material. The invention further provides a preparation method of the holmium-doped yttrium oxysulfide up-conversion luminescent material and an organic light-emitting diode using the holmium-doped yttrium oxysulfide up-conversion luminescent material.

Description

【Technical field】 [0001] The invention relates to a holmium-doped yttrium oxysulfide up-conversion luminescent material, a preparation method and an organic light-emitting diode. 【Background technique】 [0002] Organic light-emitting diodes (OLEDs) are extremely 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 oxysulfide up-...

Claims

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Application Information

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IPC IPC(8): C09K11/84H01L51/54
Inventor 周明杰王平陈吉星张振华
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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