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A phosphor based on terpyridine or its derivatives, its preparation method and application

A technology of terpyridine and derivatives, which is applied in the field of phosphors, can solve the problems of long reaction time, harsh synthesis conditions of inorganic phosphors, and high synthesis costs, and achieve the effects of reducing costs, good application prospects, and reducing synthesis costs

Active Publication Date: 2019-11-15
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The synthesis conditions of inorganic phosphors are relatively harsh, and generally require higher atmospheric pressure, higher temperature (1400-2000°C) and longer reaction time, resulting in higher synthesis costs

Method used

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  • A phosphor based on terpyridine or its derivatives, its preparation method and application
  • A phosphor based on terpyridine or its derivatives, its preparation method and application
  • A phosphor based on terpyridine or its derivatives, its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0020] In this embodiment, the fluorescent powder is made of monovalent perchlorate ion (ClO 4 - ) and a monovalent cation, the monovalent cation is a monovalent terpyridine protonated cation, wherein the molar ratio of the monovalent terpyridine protonated cation to the perchlorate anion is 1:1. The structure of the monovalent terpyridine protonated cation is shown below:

[0021]

[0022] That is, the schematic diagram of the molecular structure of the phosphor is as follows figure 1 shown.

[0023] The synthesis process of the phosphor powder is as follows:

[0024] At room temperature, dissolve 1 mmol terpyridine (2,2′:6′,2″-Terpyridine) in absolute ethanol to obtain solution A; dissolve 1 mmol perchloric acid in aqueous solution to obtain solution B; dissolve solution A Mix with solution B, statically crystallize, then filter and dry at room temperature to obtain the phosphor powder.

[0025] The XRD of the phosphor powder sample prepared above and the single crys...

Embodiment 2

[0030] In the present embodiment, the mechanism of the fluorescent powder is basically the same as that of Embodiment 1, except that the monovalent periodate ion (10 4 - ) instead of monovalent perchlorate ion (ClO 4 - ).

[0031] The preparation method of this fluorescent powder is basically the same as Example 1, the difference is that the monovalent periodate ion (10 4 - ) instead of monovalent perchlorate ion (ClO 4 - ).

[0032] Similar to Example 1, after the phosphor is excited by near-ultraviolet light with a wavelength of 200nm-380nm, the emitted light has a wavelength in the range of 400nm-550nm, and the emitted light is blue light with a main peak at 400-425nm and a main peak at 500-550nm green light; its external quantum luminous efficiency is above 40%; its internal quantum luminous efficiency is above 40%. Therefore, it can be used to prepare high-efficiency white LED lighting devices by combining it with an appropriate amount of red phosphor powder.

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Abstract

The invention provides phosphor based on terpyridine or its derivative. The phosphor is composed of monovalent acid anion and a terpyridine (2,2':6',2''-terpyridine) derivative monovalent tertiary amine cation at the molar ratio of 1:1. The phosphor contains no rare earth element and can be simply synthesized at room temperature. Thus, cost is low. After the phosphor is excited by near-ultraviolet light with wavelength of 200-380 nm, the wavelength of emitted light is within the range of 400-550 nm, and the emitted light is blue light with main peak at 400-425 nm and green light with main peak at 500-550 nm. In addition, the external quantum luminescent efficiency is 40% and above, and the internal quantum luminescent efficiency is 40% and above. Therefore, the phosphor, in cooperation with a proper amount of red phosphor, can be used in the preparation of high-efficiency white LED illuminating devices and has a good application prospect.

Description

technical field [0001] The invention relates to the technical field of fluorescent powder, in particular to a fluorescent powder based on terpyridine or derivatives thereof. Background technique [0002] The conditions for synthesizing inorganic phosphors are relatively harsh, generally requiring higher atmospheric pressure, higher temperature (1400-2000° C.) and longer reaction time, resulting in higher synthesis costs. In addition, most inorganic phosphors use rare earth elements as the luminescent center, and rare earth resources are scarce resources. Therefore, the development of rare earth element-free phosphor powders, which can be synthesized at room temperature and have higher efficiency is the goal pursued by people. Contents of the invention [0003] The present invention proposes a fluorescent powder based on terpyridine or its derivatives, which is composed of a monovalent cation and a monovalent anion, and the molar ratio of the monovalent cation to the monov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/22C09K11/06H01L33/50
CPCC07D213/22C09K11/06C09K2211/1029H01L33/502Y02B20/00
Inventor 伊晓辉刘钢李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI