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Gadolinium oxide-based up-conversion luminescence fluorescent powder and preparation method thereof

A phosphor, gadolinium oxide technology, applied in the field of phosphors

Inactive Publication Date: 2014-02-12
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, there are still few reports on the field of preparing phosphors and applying them to OLEDs.

Method used

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  • Gadolinium oxide-based up-conversion luminescence fluorescent powder and preparation method thereof
  • Gadolinium oxide-based up-conversion luminescence fluorescent powder and preparation method thereof

Examples

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preparation example Construction

[0021] The preparation method of the above-mentioned gadolinia matrix up-conversion luminescent phosphor, such as figure 1 , including the following steps:

[0022] S1, according to the molecular formula Gd 2 o 3 :xTb 3+ ,yHo 3+ The stoichiometric ratio of each element in, weighed Gd 2 o 3 , Tb 2 o 3 and Ho 2 o 3 Soluble in nitric acid, configured as total cation (ie Gd 3+ , Tb 3+ and Ho 3+ ) is a nitric acid solution of 0.5-3 mol / L, then adding polyethylene glycol with a concentration of 0.005-0.05 mol / L as a dispersant to the nitric acid solution, and stirring to obtain a precursor solution;

[0023] S2. Lead the precursor solution into the atomizer of the spray dryer, and set the inlet temperature of the atomizer to 150-220°C and the outlet temperature to 100-130°C;

[0024] S3. Pass an inert gas (such as at least one of argon and nitrogen) or a reducing gas into the atomizer, and control the gas flow rate at 1~15L / min, so that the precursor solution starts to ...

Embodiment 1

[0035] Weigh Gd2 o 3 , Tb 2 o 3 and Ho 2 o 3 The powder, whose molar ratio is 0.98:0.015:0.005, is dissolved in nitric acid to prepare a nitric acid solution with a total cation of 1.5mol / L, and adds 0.01mol / L polyethylene glycol as a dispersant to the nitric acid solution to obtain precursor solution.

[0036] Then, put the precursor solution into the atomizer of the spray dryer, the inlet temperature is 180°C, and the outlet temperature is 110°C.

[0037] Subsequently, 5 L / min of argon gas is introduced into the atomizer, and the precursor solution enters the quartz reaction chamber with the argon carrier gas, and the phosphor precursor is generated in the reaction chamber; the phosphor precursor enters the condenser with the airflow, Finally, it is collected by a microporous acid-resistant filter funnel to obtain a fluorescent powder sample.

[0038] Finally, the phosphor powder sample was calcined in a temperature-programmed furnace for 3 hours at a calcining tempera...

Embodiment 2

[0040] Weigh Gd 2 o 3 , Tb 2 o 3 and Ho 2 o 3 The powder, whose molar ratio is 0.95:0.03:0.02, is dissolved in nitric acid to prepare a nitric acid solution with a total cation of 3mol / L, and 0.05mol / L polyethylene glycol is added to the nitric acid solution as a dispersant to obtain a precursor body solution.

[0041] Then, put the precursor solution into the atomizer of the spray dryer, the inlet temperature is 220°C, and the outlet temperature is 130°C.

[0042] Subsequently, nitrogen gas of 15 L / min is introduced into the atomizer, and the precursor solution enters the quartz reaction chamber with the nitrogen carrier gas, and the phosphor precursor is generated in the reaction chamber, and the phosphor precursor enters the condenser with the air flow, and is finally Microporous acid-resistant filter funnel collected to obtain phosphor samples.

[0043] Finally, the phosphor powder sample was calcined in a temperature-programmed furnace for 5 hours at a calcining te...

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Abstract

The invention belongs to the field of fluorescent powder, and discloses gadolinium oxide-based up-conversion luminescence fluorescent powder and a preparation method thereof. The fluorescent powder has a molecular formula of Gd2O3:xTb<3+>, yHo<3+>, wherein Tb<3+> is an active ion, and is used as a luminescence center of the material, Ho<3+> is a sensitized ion, and can absorb energy and transfer energy to the Tb<3+> ion, x ranges from 0.002 to 0.06, y ranges from 0.002 to 0.04. The gadolinium oxide-based up-conversion luminescence fluorescent powder of the invention belongs to terbium holmium codoped Gd2O3:xTb<3+>, yHo<3+> up-conversion fluorescent powder; the fluorescent powder can realize long-wave radiation excitation from infrared light to green light, and the obtained 485 nm luminescence peak corresponds to the 5D4-7H6 transition radiation luminescence of the Tb<3+> ion.

Description

technical field [0001] The invention relates to the field of fluorescent powder, in particular to a gadolinium oxide matrix up-conversion luminescent fluorescent powder and a preparation method thereof. Background technique [0002] The full name of OLED is Organic Light Emitting Diode, organic light emitting diode. It has many advantages. Its component structure is simple, its production cost is cheap, and its self-luminous characteristics, coupled with OLED's short response time and bendable characteristics, make it a very wide range of applications. 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,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 周明杰王平陈吉星冯小明
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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