Terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material, and 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.

Active Publication Date: 2013-12-04
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the terbium-ytterbium-ytterbium co-doped dodecacalcium heptaaluminate-based upconversion luminescent material, which can be excited by long-wave radiation such as infrared and red-green light, has not been reported yet.

Method used

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  • Terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material, and preparation method and application thereof
  • Terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material, and preparation method and application thereof
  • Terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of the above-mentioned terbium-ytterbium co-doped calcium dodecaaluminate-based up-conversion luminescent material comprises the following steps:

[0027] Step S11, according to 12CaO·7Al 2 o 3 :xTb 3+ ,yYb 3+ The stoichiometric ratio of each element weighs CaO, Al 2 o 3 , Tb 2 o 3 and Yb 2 o 3 Powder, where 0.01≤x≤0.05, 0.01≤y≤0.1.

[0028] In this step, preferably, x is 0.03 and y is 0.05.

[0029] Step S13, mixing the powder weighed in step S11 evenly to obtain a precursor.

[0030] 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.

[0031] Step S15, burning the precursor at 800° C. to 1000° C. for 0.5 hours to 5 hours,

[0032] Preferably, the precursor is burned at 900° C. for 3 hours.

[0033] Step S17, cooling the precursor treated in step S15 to 100°C~500°C, keeping it warm for 0.5 hours~3 hours, and cooling to room temperature t...

Embodiment 1

[0039] Choose powder with a purity of 99.99%, CaO, Al 2 o 3 , Tb 2 o 3 and Yb 2 o 3Powder, the molar number of each component is 1.2mmol, 0.7mmol, 0.0015mmol, 0.0025mmol, grind it in a corundum mortar for 40 minutes to make it evenly mixed, and then burn it in a muffle furnace at 900°C for 3 hours, then Cool to 200°C and keep it warm for 2 hours, and then take it out with the furnace to cool to room temperature to obtain a bulk material, which can be crushed to obtain the general chemical formula 12CaO·7Al 2 o 3 : 0.03Tb 3+ ,0.05Yb 3+ Up-converting phosphors.

[0040] see figure 2 , figure 2 Shown are the obtained terbium-ytterbium co-doped calcium dodecaaluminate-based upconversion luminescent material (curve 1) and the sample without ytterbium (curve 2) (12CaO·7Al 2 o 3 : 0.03Tb 3+ ) of the photoluminescence spectrum. Depend on figure 2 It can be seen that the excitation wavelength of the terbium-ytterbium co-doped calcium dodecaaluminate-based up-conversio...

Embodiment 2

[0044] Choose powder with a purity of 99.99%, CaO, Al 2 o 3 , Tb 2 o 3 and Yb 2 o 3 Powder, the molar number of each component is 1.2mmol, 0.7mmol, 0.0005mmol, 0.0005mmol, grind it in a corundum mortar for 20 minutes to make it evenly mixed, and then burn it in a muffle furnace at 800°C for 0.5 hour, then Cool to 100°C and keep it warm for 0.5 hours, and then take it out with the furnace to cool to room temperature to obtain a block material, which can be crushed to obtain the general chemical formula 12CaO·7Al 2 o 3 : 0.01Tb 3+ ,0.01Yb 3+ up-converting phosphors.

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Abstract

A terbium and ytterbium co-doped '12:7'calcium aluminate group up-conversion luminescent material has the following chemical formula of 12CaO.7Al2O3:xTb<3+>,yYb<3+>, wherein 0.01<=x<=0.05, and 0.01<=y<=0.1. In photoluminescence spectra of the terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material, an excitation wavelength of the terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material is 980 nm, a luminescent peak is formed by transition radiation of Tb<3+> ion <5>D4 -> <7>H6 in a 485 nm wavelength area, and thus the material can be used as a blue light luminescent material. The invention also provides a preparation method of the terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material and an organic light emitting diode using the terbium and ytterbium co-doped '12:7' calcium aluminate group up-conversion luminescent material.

Description

technical field [0001] The invention relates to a terbium-ytterbium co-doped calcium dodecaaluminate-based 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 terbium-ytterbium co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/64H01L51/50H01L51/54
Inventor 周明杰王平陈吉星钟铁涛
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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