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Flexible electroluminescent device capable of dynamically changing color and preparation method thereof

A technology of luminescence and flexible electricity, applied in the field of flexible electroluminescent devices and their preparation, to achieve the effect of excellent flexibility and stability

Pending Publication Date: 2020-12-15
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, so far, there is still no effective strategy to achieve real-time dynamic regulation of the emission color of a single device.

Method used

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  • Flexible electroluminescent device capable of dynamically changing color and preparation method thereof
  • Flexible electroluminescent device capable of dynamically changing color and preparation method thereof
  • Flexible electroluminescent device capable of dynamically changing color and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of luminescent active components: Take 2 grams of manganese-doped zinc sulfide electroluminescent powder, add it to 10 grams of 20% solid content of styrene-butadiene-styrene thermoplastic elastomer / toluene solution, stir Mix evenly to obtain orange luminescent powder / polymer composite active material with low dielectric constant; get 2 grams of copper-doped zinc sulfide electroluminescent powder, add it to 10 grams of solid content in 20% cyano resin solution, stir Mix evenly to obtain blue light-emitting powder / polymer composite active material with high dielectric constant;

[0026] (2) Preparation of light-emitting layer: Spin-coat the orange light-emitting powder / polymer composite active material prepared in step (1) onto a flexible indium tin oxide / polyethylene terephthalate substrate through solution to obtain orange The light-emitting layer is dried on a hot stage at 80°C for 5 minutes, and then the blue light-emitting powder / polymer composite ac...

Embodiment 2

[0029] (1) Preparation of luminescent active components: Take 2 grams of manganese-doped zinc sulfide electroluminescent powder, add it to 10 grams of 20% solid content of styrene-butadiene-styrene thermoplastic elastomer / toluene solution, stir Mix evenly to obtain low dielectric constant orange luminescent powder / polymer composite active material; take 2 grams of copper-doped zinc sulfide electroluminescent powder, add it to 10 grams of solid content of 20% polyurethane solution, stir and mix evenly , to obtain blue light-emitting powder / polymer composite active material with high dielectric constant;

[0030] (2) Preparation of light-emitting layer: Spin-coat the orange light-emitting powder / polymer composite active material prepared in step (1) onto a flexible indium tin oxide / polyethylene terephthalate substrate through solution to obtain orange The light-emitting layer is dried on a hot stage at 80°C for 5 minutes, and then the blue light-emitting powder / polymer composite...

Embodiment 3

[0033] (1) Preparation of luminescent active components: Take 2 grams of manganese-doped zinc sulfide electroluminescent powder, add it to 10 grams of 20% solid content of styrene-butadiene-styrene thermoplastic elastomer / toluene solution, stir Mix evenly to obtain orange luminescent powder / polymer composite active material with low dielectric constant; get 2 grams of copper-doped zinc sulfide electroluminescent powder, add it to 10 grams of solid content in 20% cyano resin solution, stir Mix evenly to obtain blue light-emitting powder / polymer composite active material with high dielectric constant;

[0034] (2) Preparation of luminescent layer: Scrape-coat the orange luminescent powder / polymer composite active material prepared in step (1) on the silver nanowire / polyurethane substrate through the solution to obtain an orange luminescent layer, and put it in a solvent such as room temperature After natural volatilization, scrape-coat the blue light-emitting powder / polymer comp...

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Abstract

The invention belongs to the technical field of intelligent electronic devices, and particularly relates to a flexible electroluminescent device capable of dynamically changing colors and a preparation method thereof. The preparation method comprises the following steps of uniformly blending electroluminescent powder and a polymer solution to obtain a composite active material, stacking double light-emitting layers with different dielectric constants on a flexible transparent conductive substrate layer by layer through a solution film forming method, and constructing an electrode layer on theupper layer to prepare the flexible electroluminescent device. In the process of increasing the intensity of a driven electric field, the light emitting color of the device can be changed from orangelight to white light in real time and then to blue light. The electroluminescent color-changing device provided by the invention has excellent flexibility and mechanical stability, and can be designedinto various shapes to display different patterns. The electroluminescent color-changing device can play a huge application potential in the field of intelligent wearable equipment for camouflage orfashion decoration and the like.

Description

technical field [0001] The invention belongs to the technical field of intelligent electronic devices, and in particular relates to a flexible electroluminescent device capable of dynamically changing colors and a preparation method thereof. Background technique [0002] Flexible electronic devices play an important role in emerging fields such as electronic skin, human-computer interaction, and biomedicine. As one of the basic and important components, light-emitting devices play an important role in information visualization, solid-state lighting, and sensing. By simply dispersing electroluminescent powder into a flexible polymer matrix to construct a luminescent active layer, and then assembling the upper and lower electrodes, the flexible AC electroluminescent device has a simple preparation process, low production cost, and excellent durability. Unique characteristics such as high stability and stable operation in harsh environments are considered strong candidates for ...

Claims

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Application Information

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IPC IPC(8): H05B33/20
CPCH05B33/20Y02B20/00
Inventor 彭慧胜左勇孙雪梅
Owner FUDAN UNIV
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