Thulium-holmium co-doped chlorosilicate upconversion light-emitting fluorescent powder as well as preparation method thereof and organic light-emitting diode

A chlorosilicate, phosphor technology, used in luminescent materials, chemical instruments and methods, semiconductor/solid-state device manufacturing, etc.

Inactive Publication Date: 2015-06-03
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, in the field of OLED, phosphors prepared from up-conversion fluorescent materials are still rarely reported.

Method used

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  • Thulium-holmium co-doped chlorosilicate upconversion light-emitting fluorescent powder as well as preparation method thereof and organic light-emitting diode
  • Thulium-holmium co-doped chlorosilicate upconversion light-emitting fluorescent powder as well as preparation method thereof and organic light-emitting diode
  • Thulium-holmium co-doped chlorosilicate upconversion light-emitting fluorescent powder as well as preparation method thereof and organic light-emitting diode

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preparation example Construction

[0035] This embodiment also provides a method for preparing a thulium-holmium co-doped chlorosilicate upconversion luminescent phosphor, including the following steps:

[0036] (a) Weigh R according to the molar ratio of 2:2:x:y 2 CO 3 , SiO, Tm 2 o 3 and Ho 2 o 3 Powder;

[0037] (b) Dissolve the weighed powder in step (a) in hydrochloric acid HCl to prepare a 0.5-3 mol / L precursor solution, and add 0.005-0.05 mol / L polyethylene glycol to the precursor solution diol as a dispersant;

[0038] (c) introducing the precursor solution prepared in step (b) into the atomizer of the spray dryer for spray drying, wherein the reaction temperature of the atomizer is set at 100-220°C;

[0039] (d) Injecting 1 to 15 L / min of inert gas or reducing gas into the atomization device described in step (c);

[0040] (e) The precursor solution in the atomizer is atomized into an aerosol, and enters the reaction system of the spray dryer with the inert gas or the reducing gas, and the spra...

Embodiment 1

[0045] Thulium and holmium co-doped chlorosilicate upconversion luminescent phosphor Li in this embodiment 2 SiCl 6 : 0.03Tm 3+ ,0.01Ho 3+ The preparation method is as follows:

[0046] (a) Weigh Li according to the molar ratio of 2:2:0.03:0.01 2 CO 3 , SiO, Tm 2 o 3 and Ho 2 o 3 Powder;

[0047](b) Dissolve the weighed powder in step (a) in hydrochloric acid HCl to prepare a 1.5mol / L precursor solution, and add 0.01mol / L polyethylene glycol to the precursor solution as Dispersant;

[0048] (c) Introduce the precursor solution prepared in step (b) into the atomizer of the spray dryer for spray drying, wherein the inlet temperature of the atomizer is set to 180°C, and the outlet temperature is set to 110°C ;

[0049] (d) Introduce 5 L / min of argon into the atomization device described in step (c);

[0050] (e) The precursor solution in the atomizer is atomized into an aerosol, and enters the reaction system of the spray dryer with the argon gas introduced, and gene...

Embodiment 2

[0058] Thulium and holmium co-doped chlorosilicate upconversion luminescent phosphor Li in this embodiment 2 SiCl 6 : 0.06Tm 3+ ,0.04Ho 3+ The preparation method is as follows:

[0059] (a) Weigh Li according to the molar ratio of 2:2:0.06:0.04 2 CO 3 , SiO, Tm 2 o 3 and Ho 2 o 3 Powder;

[0060] (b) Dissolve the weighed powder in step (a) in hydrochloric acid HCl to prepare a 3mol / L precursor solution, and add 0.05mol / L polyethylene glycol to the precursor solution as a dispersion agent;

[0061] (c) Introduce the precursor solution prepared in step (b) into the atomizer of the spray dryer for spray drying, wherein the inlet temperature of the atomizer is set to 220°C, and the outlet temperature is set to 130°C ;

[0062] (d) Introduce 15 L / min of argon into the atomization device described in step (c);

[0063] (e) The precursor solution in the atomizer is atomized into an aerosol, and enters the reaction system of the spray dryer with the argon gas introduced, ...

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Abstract

The invention relates to thulium-holmium co-doped chlorosilicate upconversion light-emitting fluorescent powder as well as a preparation method thereof and an organic light-emitting diode. A chemical formula of the fluorescent powder is R2SiCl6:xTm<3+>, yHo<3+>, wherein R2SiCl6 is a doped matrix, Tm and Ho are doped elements, x ranges from 0.002 to 0.06, y ranges from 0.002 to 0.04; and R is lithium, sodium, potassium, rubidium or cesium. The thulium-holmium co-doped chlorosilicate upconversion light-emitting fluorescent powder disclosed by the invention can realize excite blue-light shot-wave light due to infrared-green long-wave radiation, so that part of red green light in the organic light-emitting diode is converted into blue light, and the rest of the red green light is synthesized into white light, and thus, preparation of a white-light lighting product is realized.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronic materials, in particular to a thulium-holmium co-doped chlorosilicate up-conversion luminescent phosphor, a preparation method thereof, and an organic light-emitting diode. 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 applicat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61H01L51/54
Inventor 周明杰王平陈吉星黄辉
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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