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Automatic color-changing intelligent window and application thereof

A smart window and automatic technology, applied in windows/doors, optics, parallel glass structures, etc., can solve problems such as low transmittance contrast, poor device stability, and influence of transmittance, and achieve high transmittance difference, The effect of ultra-high stability and good photoelectric conversion efficiency

Pending Publication Date: 2021-02-23
SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies have their own advantages and disadvantages. For example, the combination (1) has good stability, but the color change rate is slow, and the transmittance contrast in different states is low; the combination (2) device has better color change rate and transmittance contrast. , but the stability of the device is relatively poor; the integrated photovoltaic electrochromic glass window of combination (3) has a beautiful appearance, but the transmittance will be affected to a certain extent, etc.

Method used

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  • Automatic color-changing intelligent window and application thereof
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  • Automatic color-changing intelligent window and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0070] This preparation example provides an electrochromic material MPV, the structure is as follows:

[0071]

[0072] The preparation method is:

[0073]

[0074] Dissolve 4,4'-bipyridine (0.3g, 1.9mmol) and 5-chloro-1-pentyne (0.176g, 1.7mmol) in 2mL N,N-dimethylformamide, heat to 90°C, The reaction was stirred for 14 hours, and after cooling down to room temperature, the solvent was spin-dried on a rotary evaporator, and the obtained crude product was purified through a silica gel column to obtain the target product MPV as a gray solid, a total of 0.20 g, with a yield of 40%.

[0075] 1 H-NMR (400MHz, D 2 O): δ8.94(d, J=6.8Hz, 2H), 8.66(s, 2H), 8.33(s, 2H), 7.82(s, 2H), 4.74(t, J=6.8Hz, 2H), 2.40-1.98(m,5H).

preparation example 2

[0077] This preparation example provides an electrochromic material DPV, the structure is as follows:

[0078]

[0079] The preparation method is:

[0080]

[0081] Dissolve 4,4'-bipyridine (0.3g, 1.9mmol) and 5-chloro-1-pentyne (0.49g, 4.8mmol) in 2mL N,N-dimethylformamide, heat to 110°C, The reaction was stirred for 36 hours. After cooling down to room temperature, the crude product was precipitated and washed three times with N,N-dimethylformamide to obtain the target product DPV as a gray solid, 0.45 g in total, with a yield of 66%.

[0082] 1 H-NMR (400MHz, D 2 O): δ9.09(d, J=6.7Hz, 2H), 8.48(d, J=6.3Hz, 4H), 4.80(t, J=6.8Hz, 4H), 2.39-2.05(m, 10H).

Embodiment 1

[0084] The preparation method of the gel electrochromic device in this embodiment comprises the following steps:

[0085] (1) In the glove box, the electrochromic material DPV (0.1mmol), ferrocene (0.8mmol, 23mg), propylene carbonate (150mg), lithium trifluoromethylsulfonimide provided by Synthesis Example 1 Salt (160 mg) and polypropylene butyral (300 mg, number average molecular weight 55000 g / mol) were dissolved in dry methanol (1.5 mL), stirred for 2 hours to obtain a uniform gel;

[0086] (2) Pour the gel into the liquid crystal cell. The liquid crystal cell is sandwiched by two pieces of conductive glass with a piece of paraffin film, and the two pieces of ITO face each other; Determined by the shape of the paraffin film, the effective area of ​​discoloration is a circle with a radius of 0.8 cm and an area of ​​2 cm 2 .

[0087] A gel electrochromic device is connected in series with a perovskite solar cell to form an automatic color-changing smart window.

[0088] Su...

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Abstract

The invention provides an automatic color-changing intelligent window and an application thereof. The automatic color-changing intelligent window comprises a perovskite solar cell and a gel electrochromic device which are connected in series. An excellent electrochromic property, a high light transmittance difference value and ultrahigh stability are possessed, and the perovskite solar cell has very good photoelectric conversion efficiency. Automatic photochromic performance after combination of the two is good, and the intelligent window can be used for automatic adjustment of indoor light.

Description

technical field [0001] The invention belongs to the field of electrochromic materials, and relates to an automatic color-changing smart window and its application. Background technique [0002] Electrochromic materials and devices change the absorption and transmission of light under the action of an electric field. Smart windows prepared using this phenomenon and technology can be used as exterior glass windows of buildings, car windows or aircraft portholes. As the exterior wall glass windows of buildings, electrochromic smart windows can selectively absorb or reflect external heat radiation and prevent internal heat diffusion through the change of color depth, effectively reducing the maintenance of buildings such as office buildings and residential buildings in summer. A lot of energy must be expended to keep cool and warm in winter. Usually, the change of window glass color is driven by an external power source. In order to reduce the energy consumption caused by using...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/163G02F1/1516E06B3/67
CPCG02F1/163G02F1/15165E06B3/6722
Inventor 苏峰育凌欢田颜清刘言军
Owner SOUTH UNIVERSITY OF SCIENCE AND TECHNOLOGY OF CHINA
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