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Flexible intelligent dimming film with high visible light transmittance and heat insulation and preparation method of film

An intelligent dimming and visible light technology, which is applied in optics, nonlinear optics, ion implantation plating, etc., can solve the problems of low transmittance and large-area uniformity of light-adjusting films, so as to improve visible light transmittance and suppress The effect of interface reflection

Pending Publication Date: 2020-09-08
宁波材料所杭州湾研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These new transparent electrode-based devices show better bending performance than ITO, but the transmittance and large-area uniformity of the dimming film are still lower than commercial ITO-based devices, and need to be further improved

Method used

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  • Flexible intelligent dimming film with high visible light transmittance and heat insulation and preparation method of film
  • Flexible intelligent dimming film with high visible light transmittance and heat insulation and preparation method of film
  • Flexible intelligent dimming film with high visible light transmittance and heat insulation and preparation method of film

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preparation example Construction

[0035] The present invention also provides a method for preparing the above-mentioned flexible intelligent dimming film, comprising the following steps:

[0036]A) preparing two transparent substrates respectively, sequentially compounding an oxide layer, an ultra-thin metal layer and an oxide layer on the surface of the transparent substrates to obtain two flexible transparent conductive electrodes;

[0037] B) Coating polymer-dispersed liquid crystals on the surface of the oxide layer of the two flexible transparent conductive electrodes, superimposing them, and performing a curing reaction to obtain a flexible intelligent dimming film with high visible light transmission and heat insulation.

[0038] In the invention, two transparent substrates are firstly prepared, and then an oxide layer, an ultra-thin metal layer and an oxide layer are sequentially compounded on the surface of the transparent substrates. Among them, the composite method is not particularly limited, and a...

Embodiment 1

[0044] Step 1: Select flexible transparent PET with a thickness of 125 μm as the base layer;

[0045] Step 2: Deposit laminated electrodes on the PET substrate by winding magnetron sputtering. Both bottom and top oxide are Nb 2 o 5 , a thickness of 20-60nm, preferably a thickness of 35nm; the metal layer is a Cu-doped Ag layer with a thickness of 6-18nm, preferably a thickness of 13nm, wherein the atomic ratio of Cu and Ag is 1:99-10:90, The preferred ratio is 5:95. Obtained PET / Nb 2 o 5 / Ag-Cu / TiO 2 The sheet resistance of the laminated electrode is 5.2Ω / sq, the average visible light transmittance (400-800nm) is 85.1% (including the substrate), and the laminated electrode has excellent mechanical flexibility;

[0046] Step 3: preparing polymer dispersed liquid crystal. Mix NOA65 UV-curable glue, LC E7 liquid crystal and silica pellets evenly, and the silica pellets with a diameter of 20 μm are used as fillers to control the thickness of PDLC devices;

[0047] Step 4: ...

Embodiment 2

[0049] Step 1: Select flexible transparent PET with a thickness of 125 μm as the base layer;

[0050] Step 2: Deposit laminated electrodes on the PET substrate by winding magnetron sputtering. Both bottom and top oxide are Nb 2 o 5 , a thickness of 20-60nm, preferably a thickness of 35nm; the metal layer is a Cu-doped Ag layer with a thickness of 6-18nm, preferably a thickness of 11nm, wherein the atomic ratio of Cu and Ag is 1:99-10:90, The preferred ratio is 5:95. Obtained PET / Nb 2 o 5 / Ag-Cu / TiO 2 The sheet resistance of the laminated electrode is 6.4Ω / sq, the average visible light transmittance (400-800nm) is 85.2% (including the substrate), and the laminated electrode has excellent mechanical flexibility;

[0051] Step 3: preparing polymer dispersed liquid crystal. Mix NOA65 UV-curable glue, LC E7 liquid crystal and silica pellets evenly, and the silica pellets with a diameter of 20 μm are used as fillers to control the thickness of PDLC devices;

[0052] Step 4: ...

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Abstract

The invention provides a flexible intelligent dimming film with visible light high transmittance and heat insulation. The flexible intelligent dimming film comprises a polymer dispersed liquid crystallayer and flexible transparent conductive electrodes symmetrically arranged at the two sides of the polymer dispersed liquid crystal layer. The flexible transparent conductive electrode comprises anoxide layer, an ultrathin metal layer and an oxide layer which are stacked in sequence, and the oxide layer is selected from TiO2 or Nb2O5. The flexible intelligent dimming film provided by the invention has high visible light transmittance and also has efficient heat insulation performance.

Description

technical field [0001] The invention belongs to the technical field of flexible optoelectronic devices, and in particular relates to a flexible intelligent dimming film with high visible light transmission and heat insulation and a preparation method thereof. Background technique [0002] Intelligent polymer dispersed liquid crystal dimming film (PDLC) is a mixture of polymer and liquid crystal particles sandwiched between two transparent electrodes, and the arrangement sequence of liquid crystals is regulated by an electric field, so that the dimming film can be switched between transparent and opaque. Due to its advantages of safety, energy saving, low power consumption, intelligent dimming and ease of use, dimming films have been used in privacy protection, outdoor display, energy-saving windows and other fields. At present, the commercialized dimming film uses ITO transparent conductive film as the electrode, and the sandwich structure of the smart liquid crystal dimming...

Claims

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Application Information

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IPC IPC(8): G02F1/1334G02F1/1343C23C14/08C23C14/20C23C14/35C23C14/56
CPCG02F1/1334G02F1/134309C23C14/35C23C14/562C23C14/083C23C14/205
Inventor 宋伟杰黄金华李佳杨晔兰品军
Owner 宁波材料所杭州湾研究院
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