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Copper nano-cluster fluorescent powder and preparation method thereof

A technology of copper nanoclusters and phosphors, which is applied in the field of copper nanoclusters phosphors and its preparation, can solve the problems of poor long-term stability and low fluorescence intensity, improve the problem of low quantum efficiency, enhance stability and fluorescence intensity Effect

Pending Publication Date: 2021-07-02
SHENZHEN INST OF WIDE BANDGAP SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current copper nanoclusters still have some disadvantages such as low fluorescence intensity and poor long-term stability. Therefore, a method to improve their fluorescence intensity and stability is needed to greatly promote their application in the field of optical communication.

Method used

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  • Copper nano-cluster fluorescent powder and preparation method thereof
  • Copper nano-cluster fluorescent powder and preparation method thereof
  • Copper nano-cluster fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Example 1 This example provides a method for preparing a copper nanocluster phosphor

[0045] (1) Synthesis of primary copper nanoclusters: Mix 5mmol / L copper chloride solution and 5mmol / L reduced glutathione aqueous solution at a volume ratio of 1:5, shake at 40°C for 20min, then add 1.5mmol / L NaOH was added to a pH of 7, and a primary copper nanocluster solution was prepared by ultrasonication at 30° C. for 2 h. The glutathione molecule removes the H atom on the S-H bond and combines with the Cu atom to effectively reduce the copper ion in the primary copper nanocluster solution to 0 valence or 1 valence, thereby stabilizing the nanocluster.

[0046] (2) Preparation of ion-enhanced copper nanoclusters: 0.5mL 2g / L aqueous solution of primary copper nanoclusters, adding Cd at a concentration of 1mol / L 2+ 0.5 mL of the solution was stirred at 35° C. for 2 hours, the above system was centrifuged, and the precipitate was dried at 70° C. for 8 hours to obtain a copper nano...

Embodiment 2

[0048] Example 2 This example provides a method for preparing a red-light copper nanocluster phosphor

[0049] (1) Synthesis of primary copper nanoclusters: Mix 5mmol / L copper nitrate solution and 5mmol / L penicillamine aqueous solution at a volume ratio of 1:6, shake at 25°C for 10min, then add 1mmol / L sodium hydroxide to pH Sonicate at 5, 40°C for 15min.

[0050] (2) Preparation of ion-enhanced copper nanoclusters: take 0.5 g / mL aqueous solution of copper nanoclusters, add Ce at a concentration of 1 mol / L 3+ 0.3 mL of the solution was stirred at 35° C. for 0.5 h, the above system was centrifuged, and the precipitate was dried at 60° C. for 12 h to obtain a copper nanocluster phosphor with enhanced fluorescence.

[0051] like figure 1 Shown is the absorption, excitation and emission spectra of the copper nanocluster phosphor. Under the excitation light of 420nm, the primary copper nanocluster solution produces red fluorescence with a peak at 610nm.

[0052] like figure 2 ...

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Abstract

The invention discloses copper nano-cluster fluorescent powder and a preparation method thereof. The copper nano-cluster fluorescent powder at least comprises a first-level metal-organic structure and a second-level nano-cluster-metal ligand structure; the first-level metal-organic structure is a primary copper nano-cluster assembled by a copper atom and an organic ligand; and the second-levl structure is a copper nano-cluster assembled by the primary copper nano-cluster and a metal ligand. By adding the ionic ligand, the stability of the copper nano-cluster is remarkably enhanced, and meanwhile, the problem that the fluorescence intensity of the copper nano-cluster is poor is solved.

Description

technical field [0001] The invention relates to the technical field of nano-luminescent materials, in particular to a copper nano-cluster fluorescent powder and a preparation method thereof. Background technique [0002] With the increasing demand for fast wireless data communication, the existing RF / microwave wireless technology is under great pressure due to the limitation of bandwidth and spectrum congestion, and the emerging visible light communication technology, based on LED's high-speed blinking and high brightness characteristics , which combines solid-state lighting and data communications, is gradually being developed as a complement to existing wireless technologies. Traditional white LEDs used for solid-state lighting mainly use blue light chips to excite YAG:Ce rare earth phosphors to obtain white light. However, the phosphors have a long fluorescence lifetime (μs-ms level), and the -3dB modulation bandwidth is low, only ~2.5MHz. Thereby limiting the optical co...

Claims

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Application Information

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IPC IPC(8): C08G83/00C09K11/06
CPCC08G83/008C09K11/06C09K2211/188C09K2211/182
Inventor 文卓奇梅时良熊志勇邱艺陈智浩崔忠杰何海洋杨丹杨波波魏娴解凤贤郭睿倩张万路叶怀宇张国旗
Owner SHENZHEN INST OF WIDE BANDGAP SEMICON
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