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Preparation of copper-based metal halide luminous single crystal and application thereof

A metal-based and halide-based technology, applied in the field of new organic-inorganic hybrid metal halide materials, can solve the complex process of synthesizing the core-shell structure and other problems, and achieve the effects of low equipment requirements, good reproducibility, and low synthesis temperature

Pending Publication Date: 2022-01-11
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of synthesizing the core-shell structure is complex and requires the synergy of multiple components. In addition, the two-photon process needs to be realized under high power conditions.

Method used

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  • Preparation of copper-based metal halide luminous single crystal and application thereof
  • Preparation of copper-based metal halide luminous single crystal and application thereof
  • Preparation of copper-based metal halide luminous single crystal and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Example 1 A method for preparing a copper-based metal halide luminescent single crystal

[0043] Using CuI as the Cu source to synthesize (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 O single crystal is taken as an example, the method comprises the following steps;

[0044] (1) In a glass bottle, dissolve N-aminoethylpiperazine (1mmol) in 1mL45-48wt% hydroiodic acid (HI) aqueous solution under ice bath conditions to obtain the precursor of N-aminoethylpiperazine body solution;

[0045] (2) In a 50mL polytetrafluoroethylene reaction kettle, add 9mL hydroiodic acid aqueous solution and 1mL hypophosphorous acid. The function of hypophosphorous acid is mainly to prevent the oxidation of monovalent Cu. Add 1mmol CuI to the inner tank of the above reaction kettle and stir for 5min. Next, the precursor of N-aminoethylpiperazine was added and stirred for 30 min. Seal the inner liner of the reaction kettle in the stainless steel shell, first keep it warm at 160°C for 6 hours, th...

Embodiment 2

[0048] Embodiment 2 (C 6 h 18 N3 ) 2 Cu 2 x 6 ·2X·2H 2 X-ray imaging application of O single crystal

[0049] The synthetic (C of embodiment 1 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 O single crystal has very high luminous efficiency, large Stokes shift, weak self-absorption, and the luminescence spectrum is consistent with the efficiency curve of commercial CMOS flat-panel photodetectors. At the same time, it is very important that (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 O single crystal contains heavy atom I, which has a strong ability to absorb X-rays, so it is very suitable as an X-ray imaging material. Such as Figure 6 As shown, (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 O single crystals emit very bright turquoise fluorescence under X-ray irradiation, and the emission peak is located near 495nm, which is consistent with the photoluminescence spectrum. Comparing the scintillator performance of the commercial scintillator bismuth germanate (BGO) ( Figure 7 ), (...

Embodiment 3

[0052] Embodiment 3 (C 6 h 18 N 3 ) 2 Cu 2 x 6 ·2X·2H 2 O single crystal up-conversion application

[0053] (C synthesized in embodiment 1 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 The O single crystal was placed in front of the near-infrared femtosecond laser, and it was found that (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 O single crystals can emit very bright turquoise fluorescence, indicating that (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 The O material has an upconversion response. Such as Figure 9 As shown, (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 O single crystals emit bright turquoise fluorescence under 800nm ​​laser irradiation. Figure 10 gives (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 The up-conversion fluorescence spectrum of O single crystal, when the excitation light is in the range of 780-860nm, the crystal can emit turquoise fluorescence. About (C 6 h 18 N 3 ) 2 Cu 2 I 6 ·2I·2H 2 The up-conversion mechanism of O single crystal first excludes ...

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Abstract

The invention belongs to the technical field of novel organic and inorganic hybrid metal halide materials, and particularly relates to preparation of a copper-based metal halide luminescent single crystal and an application thereof, a cuprous compound and N-aminoethylpiperazine are synthesized through a hydrothermal method to obtain the novel cuprous-based metal halide single crystal, the preparation method is simple, The synthesis temperature is low, the equipment requirement is low, large-scale synthesis at low temperature can be realized, the required raw materials do not contain rare earth elements, the copper element is abundant in reserves, and the cost is low; the synthesized(C6H18N3)2Cu2X6. 2X. 2H2O single crystal material is a multifunctional luminescent material, the stability (humidity and temperature stability) is remarkably improved, the spectral response range comprises an ultraviolet region, a near-infrared region and an X-ray region, down-conversion / up-conversion / X-ray triple response is realized, the application range is wide, and the material can be applied to the fields of solid-state illumination, X-ray imaging, fluorescent falsification prevention and the like.

Description

technical field [0001] The invention belongs to the technical field of novel organic-inorganic hybrid metal halide materials, and specifically relates to the preparation and application of a copper-based metal halide light-emitting single crystal. Background technique [0002] Luminescent materials refer to materials that can convert absorbed energy into light radiation. Luminescent materials are widely used in solid-state lighting, display devices, lasers, high-energy ray detection, and fluorescent anti-counterfeiting. Among them, luminescent materials with multifunctional responses play a very important role in the fields of anti-counterfeiting, sensing, data storage, and light detection. At present, many anti-counterfeiting methods have been applied to the field of anti-counterfeiting, including magnetic, plasma element, fluorescence and other technologies. Among them, fluorescent anti-counterfeiting technology requires low equipment cost, and the luminescence spectrum o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/12C07D295/13C09K11/61C30B7/14
CPCC30B29/12C30B7/14C07D295/13C09K11/615C07B2200/13
Inventor 匡代彬魏俊华罗健彬张志忠
Owner SUN YAT SEN UNIV
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