Single-matrix double-band white light emitting material and preparation method and application thereof

An emissive material and single-matrix technology, which is applied in the direction of luminescent materials, amino compound preparation, chemical instruments and methods, etc., can solve the problems of complex preparation process, difficult operation, high price, etc., and achieve simple preparation process, good repeatability, Simple operation effect

Active Publication Date: 2021-08-03
HUAZHONG UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both methods have their own disadvantages, such as YAG:Ce 3+ Due to the lack of red light components, the yellow phosphor powder excited by the blue LED has a higher color temperature and a lower color rendering index, which cannot meet the needs of efficient lighting. The fluorescent powder will have a serious self-absorption problem, which limits the luminous efficiency. At the same time, when obtaining high-quality white light, it is necessary to accurately match the ratio of the three-color phosphors, which is difficult to operate, and because the attenuation of the three-color phosphors during use Inconsistency in service life causes the white light spectrum to change and become unstable with prolonged use, and most of the phosphors rely on strategic rare earth elements, which are expensive and rare in content. At the same time, the preparation process is complicated, high temperature sintering is required, and the cost is high. Therefore, , it is necessary to develop a new generation of new single-matrix white light fluorescent materials to achieve green lighting

Method used

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  • Single-matrix double-band white light emitting material and preparation method and application thereof
  • Single-matrix double-band white light emitting material and preparation method and application thereof
  • Single-matrix double-band white light emitting material and preparation method and application thereof

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Effect test

Embodiment 1

[0031] The preparation method of the white light single crystal in this embodiment, the specific preparation steps are as follows:

[0032] (1) Add 1mmol C 16 h 36 NI (CAS 311-28-4, purchased from Aladdin Chemical Reagent Network) and 1 mmol CuI were weighed and mixed in a glass bottle, and then 500 μL of organic solvent DMF and 100 μL of H 3 PO 2 , the above mixture was ultrasonically dissolved for 10min to obtain a clear precursor solution (the reason why this step uses H 3 PO 2 , is to suppress the monovalent copper ion Cu + Oxidation; In addition, H 3 PO 2 The dosage can be flexibly adjusted according to the actual situation, for example, H 3 PO 2 The volume ratio with the organic solvent may preferably be 1:5 to 1:30);

[0033] (2) Filter the reaction precursor solution obtained in the step (1) into a glass bottle with a filter head of 0.22 μm, and place the glass bottle statically in a fume hood;

[0034] (3) The filtered precursor solution obtained in the step...

Embodiment 2

[0037] The preparation method of the white light single crystal in this embodiment, the specific preparation steps are as follows:

[0038] (1) Add 1mmol C 16 h 36 NI and 1mmol CuI were weighed and mixed in a glass bottle, and then the organic solvent 2.9mL DMF and 100μL H 3 PO 2 , the above mixture was ultrasonically dissolved for 10 minutes to obtain a clear precursor solution;

[0039] (2) Filter the reaction precursor solution obtained in the step (1) into a glass bottle with a filter head of 0.22 μm, and place the glass bottle statically in a fume hood;

[0040] (3) The filtered precursor solution obtained in the step (2) is left to stand for 3 days in a fume hood, and single crystals with single matrix and double band white light emission will be precipitated and grown;

[0041] (4) Rinse the single-matrix double-band white light emission single crystal obtained in step (3) with ethanol, and dry naturally to obtain a clean single-matrix double-band white light emissi...

Embodiment 3

[0044] The preparation method of the white light single crystal in this embodiment, the specific preparation steps are as follows:

[0045] (1) Add 1mmol C 16 h 36 NI and 1 mmol CuI were weighed and mixed in a glass bottle, and then 500 μL of organic solvent DMSO and 100 μL of H were injected into it. 3 PO 2 , the above mixture was ultrasonically dissolved for 10 minutes to obtain a clear precursor solution;

[0046] (2) Filter the reaction precursor solution obtained in the step (1) into a glass bottle with a filter head of 0.22 μm, and place the glass bottle statically in a fume hood;

[0047] (3) The filtered precursor solution obtained in the step (2) is left to stand in a fume hood for 1 day, and a single crystal with a single matrix and double band white light emission will be precipitated and grown;

[0048] (4) Rinse the single-matrix double-band white light emission single crystal obtained in step (3) with ethanol, and dry naturally to obtain a clean single-matrix...

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Abstract

The invention belongs to the technical field of luminescent materials, and discloses a single-matrix double-band white light emitting material and a preparation method and application thereof. The chemical formula of the material is (C16H36N)CuI2, and the material can be especially applied to a white light LED. The chemical composition of the material is improved to obtain the (C16H36N)CuI2 material, the single-matrix double-band white light emission can be realized without the participation of rare earth elements, compared with the prior art, the variety of the single-matrix white light material can be effectively expanded, the emission spectrum covers the whole visible light region, the excitation spectrum covers 250-400nm at 400-850nm, and the PLQY is up to 54.3%.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and more specifically relates to a single-matrix double-band white light-emitting material and its preparation method and application. Background technique [0002] Lighting is ubiquitous in human society, and the electricity consumed by lighting accounts for one-fifth of the total electricity consumption of all human beings. Compared with traditional incandescent lighting, semiconductor lighting technology based on GaN-based light-emitting diodes (light-emitting diodes, LEDs) to excite phosphors has many advantages such as energy saving, environmental protection, high luminous efficiency, long life, and wide application range. mainstream technology in the market. At present, white LEDs used in daily life are usually produced in two ways, one is that blue LEDs excite YAG:Ce 3+ The yellow phosphor produces white light, and the other is an ultraviolet LED that excites red, green and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/61C09K11/06C07C209/00C07C211/07H01L33/50
CPCC09K11/06C09K11/615C07C209/00H01L33/502C07C211/07Y02B20/00
Inventor 张建兵连霖源唐江高亮蓝新正张道礼
Owner HUAZHONG UNIV OF SCI & TECH
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