Organic white light fluorescent luminous material and its preparing method

A luminescent material and fluorescence technology, applied in luminescent materials, chemical instruments and methods, sustainable buildings, etc., can solve the problem of not many photoluminescent WLEDs, and achieve the effect of improving color temperature and color coordinates

Inactive Publication Date: 2004-02-11
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For electroluminescence, people have studied a lot, but there is not much research on photoluminescence WLED, and the packaged photoluminescence organic WLED has not been reported yet.

Method used

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  • Organic white light fluorescent luminous material and its preparing method
  • Organic white light fluorescent luminous material and its preparing method

Examples

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Effect test

example 1

[0011] Weigh reduced dark blue: 0.1g LLDPE: 10g, mix and stir for 20-40min, then take 0.1g mixture, LLDPE: 10g, mix and stir for 20-40min to obtain 1:10 4 mixture. Take 1g of 1:10 4 Put the mixture on a ceramic plate coated with liquid paraffin, heat them to a molten state on an electric furnace at 180°C, stir the molten mixture with a stirring rod coated with liquid paraffin, make it further completely mixed, and spread it evenly into about 0.5 mm thick film, then heated for 5 minutes to remove. After cooling, it can be scraped off with a knife to obtain an organic luminescent film that emits red light. The film can encapsulate green LED tube cores with a wavelength of 540nm-560nm to generate white light. Its excitation and emission spectra are as figure 1 . Example 2

example 2

[0012] Weigh riboflavin: 0.1g, reduced violet 0.3g, LLDPE: 10g. First put riboflavin and reduced violet into 5ml of deionized water, stir evenly, pour into LLDPE, mix and stir for 20-40min, put into drying oven for 90min. Then take 0.1g of the mixture, LLDPE: 10g, mix and stir for 20-40min to obtain 4:10 4 mixture. Take 1g of 4:10 4 Put the mixture on a ceramic plate coated with liquid paraffin, heat them to a molten state on an electric furnace at 190 ° C, stir the molten mixture with a stirring rod coated with liquid paraffin, make it further completely mixed, and spread it evenly into about 0.5 mm thick film, then heated for 5 minutes to remove. After cooling, scrape it off with a knife to get an organic luminescent film that emits yellow-green light and red light. The thin film can encapsulate blue LED tube cores with a wavelength of 450nm-470nm to generate white light. Its emission spectrum is as figure 2 .

[0013] The conjugated compound of the present invention...

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Abstract

The organic white light fluorescent material consists of conjugate compound and linear low-density polyethylene in the ratio of 1 to 1000-100000, which are heated to 170-200 deg.c, smelted and cooled. The conjugate compound may be riboflavine, Nuodanming, vat violet, vat yellow, vat orange and vat deep blue or their mixture. When the organic fluorescent material of the present invention is prepared into film and packed into blue core or green core LED, white light may be produced. Via altering the material composition, different strength ratio between the yellow-green light and the red light may be obtained, and this can improve the color temperature and color mark of white light LED to obtain ideal white light.

Description

technical field [0001] The invention relates to an organic white light fluorescent luminescent material for blue or green light emitting diodes and a preparation method thereof. Background technique [0002] At present, organic light-emitting devices have low cost, low power consumption, simple preparation process, and a wide variety of luminescent substances, which have attracted great attention from scientific researchers in various countries and become a research hotspot in the field of light-emitting displays. Organic white light-emitting diodes (WLEDs) have huge application value and potential market in lighting. There are two types of organic WLEDs: electroluminescence and photoluminescence. For electroluminescence, people have studied a lot, but there is not much research on photoluminescence WLED, and the packaged photoluminescence organic WLED has not been reported yet. In view of this, there is an urgent need to develop organic photoluminescent WLEDs. Organic ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
CPCY02B20/181Y02B20/00
Inventor 苗洪利王晶郑荣儿孟继武
Owner OCEAN UNIV OF CHINA
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