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Preparation method of green LED activated by dye

A technology of light-emitting diodes and dyes, applied to electrical components, circuits, semiconductor devices, etc., can solve problems such as low efficiency and lack of green light-emitting materials, and achieve high efficiency

Inactive Publication Date: 2010-06-02
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the efficiency of the green LED core that directly emits this wavelength is low. Using efficient blue light (peak wavelength 450-470nm) to emit the LED core to excite the green luminescent material can realize the conversion from blue light to green light, which is the best way to produce high-efficiency green light. A New Approach to Light-Emitting Diodes
However, there is a lack of green light-emitting materials that can match the blue LED tube core and emit at a wavelength of 500-530nm.

Method used

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  • Preparation method of green LED activated by dye
  • Preparation method of green LED activated by dye

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix the coumarin 540 dye to a concentration of 10 -4 The coumarin 540 ethanol solution of g / mL; According to the weight ratio of the coumarin 540 ethanol solution and the transparent encapsulation resin glue is 2 and mixes evenly, correspondingly, the coumarin 540 dye weight percent in the transparent encapsulation resin glue is 0.0276 %; Utilize the resin glue containing coumarin 540 dye to carry out conventional LED packaging, and then heat and cure at 120°C for 30 minutes; take it out, and obtain a high-brightness green LED with a peak emission wavelength at 499nm.

Embodiment 2

[0021] Mix the coumarin 540 dye to a concentration of 10 -4 The coumarin 540 ethanol solution of g / mL; According to the weight ratio of coumarin 540 ethanol solution and transparent encapsulation resin glue is 5.76 mix evenly, correspondingly, in the transparent encapsulation resin glue, coumarin 540 dye weight percent is 0.0713 %; Use the resin glue containing coumarin 540 dye to carry out conventional LED packaging, and then heat and cure at 120°C for 30 minutes; take it out, and obtain a high-brightness green LED with a peak emission wavelength at 513nm.

Embodiment 3

[0023] Mix the coumarin 540 dye to a concentration of 10 -4 The coumarin 540 ethanol solution of g / mL; According to the weight ratio of the coumarin 540 ethanol solution and the transparent encapsulation resin glue is 7.74 and mixes evenly, correspondingly, the coumarin 540 dyestuff weight percent in the transparent encapsulation resin glue is 0.09763 %; Utilize resin glue containing coumarin 540 dye to carry out conventional LED packaging, and then heat and cure at 120°C for 30 minutes; take it out, and obtain a high-brightness green LED with a peak emission wavelength at 522nm.

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Abstract

The invention relates to a dye-activated green LED and a preparation method thereof. A packaged assembly of coumarin 540 dye and a blue light transmitting LED tube core are adopted to achieve a greenLED; the invention adopts the preparation method that a certain concentration of a coumarin 540 alcohol solution is prepared, and is uniformly mixed with transparent potting resin glue by a proper proportion, and LED conventional potting is performed to obtain the green light LED. The dye-activated green LED has the advantages that the green LED can transmit high-luminance and high-efficiency green light, the transmitted peak wavelength can be adjusted within 459 nm to 525 nm spectral range, and the dye-activated green LED can be widely applied to multiple illumination and display technical fields, such as traffic lights.

Description

technical field [0001] The invention relates to the technical field of illumination and display, in particular to a dye-activated green light-emitting diode and a preparation method thereof. Background technique [0002] Green light-emitting diodes with emission wavelengths in the spectral range of 500-530nm can be used in various lighting and display technologies including green LEDs (wavelength peak at 505nm±2nm) traffic lights. At present, the efficiency of the green LED core that directly emits this wavelength is low, and the use of efficient blue light (peak wavelength 450-470nm) to emit the LED core to excite the green luminescent material can realize the conversion from blue light to green light. A new approach to light-emitting diodes. However, there is a lack of green light-emitting materials that can match the blue-light LED tube core and have an emission wavelength of 500-530 nm. Contents of the invention [0003] The object of the present invention is to prov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/00
Inventor 张家骅金叶张霞
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI