Photosensitive ferroelectric polymer composite film and preparation method thereof, and ferroelectric device or piezoelectric device using composite film

A composite film and polymer technology, applied in the field of flexible electronics and optoelectronic materials, can solve the problems of damage to the mechanical flexibility of materials, the inability to have both flexibility and strong polarization, and the limited increase in electric polarization strength, and achieve both ferroelectricity , stable luminescent properties, simple and easy preparation method

Active Publication Date: 2021-12-17
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no matter whether it is through molecular structure design or through composite strategies to improve the performance of the electric polarization strength, the increase in the electric polarization strength is limited, and the introduction of an inorganic second phase will greatly damage the mechanical flexibility of the material, and it is impossible to achieve both excellent flexibility and strong polarization

Method used

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  • Photosensitive ferroelectric polymer composite film and preparation method thereof, and ferroelectric device or piezoelectric device using composite film
  • Photosensitive ferroelectric polymer composite film and preparation method thereof, and ferroelectric device or piezoelectric device using composite film
  • Photosensitive ferroelectric polymer composite film and preparation method thereof, and ferroelectric device or piezoelectric device using composite film

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preparation example Construction

[0109] The second aspect of the present invention provides a kind of preparation method of composite thin film, comprise (1) organic salt and inorganic salt are dissolved in the organic solvent, obtain the step of perovskite precursor solution; (2) in described perovskite Adding the powder of the polymer matrix to the ore precursor solution and stirring to obtain a perovskite precursor-polymer mixed solution; (3) preheating the mixed solution to obtain a preheated mixed solution; (4 ) a step of casting the preheated mixed solution to obtain a coating film; (5) vacuum drying the coating film to obtain a composite film.

[0110] (1) Dissolving organic salt and inorganic salt in organic solvent to obtain the step of perovskite precursor solution

[0111] Organic salts may include organic halide salts, which may be salts including organic cations and halide ions. Organic cations can include CH 3 NH 3 + 、CH(NH 2 ) 2 + 、C 4 h 12 N + 、C 16 h 36 N + one or a combination o...

Embodiment 1

[0131] Prepare the MAPB / PVDF-1 composite film that MAPB content is 1 mass % by the following steps:

[0132] (1) PVDF (Shanghai Sanaifu New Material Co., Ltd., molecular weight 5×10) will be stored 5 g / mol, density 1.77g / cm 3 ) The glass jar of the powder was put into an air blast oven at 80°C with the open mouth, and kept standing for more than 12 hours to remove traces of water adsorbed in the polymer.

[0133] (2) As shown in Table 1, accurately weigh 0.00472g methylamine bromide (CH 3 NH 3 Br, namely, MABr, white crystal, Xi'an Bao Lai Te Optoelectronics Particle Co., Ltd.) and 0.01548g lead bromide (PbBr 2 , white powder, Aladdin Reagent Co., Ltd.) and placed in a 50mL beaker, add 20mL of N,N-dimethylformamide (hereinafter referred to as "DMF", Beijing Chemical Plant), and use medium-speed magnetic force at room temperature Stir for 10 minutes until completely dissolved.

[0134] (3) Increase the magnetic stirring speed to high speed, pour 2.00000g of weighed PVDF po...

Embodiment 2

[0160] In addition to changing the amount of methylamine bromide and lead bromide raw materials as shown in Table 1 to change the content of filler particles in the composite film, the composite film MAPB / PVDF-2 of Example 2 was prepared in the same manner as in Example 1 . The same tests as for the composite film of Example 1 were carried out. The results are shown in Tables 2-5.

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Abstract

The invention relates to a photosensitive ferroelectric polymer composite film and a preparation method thereof, and a ferroelectric device or a piezoelectric device using the composite film. The composite film comprises an organic flexible polymer matrix and inorganic-organic hybrid perovskite filler particles, wherein the content of the filler particles relative to the total mass of the composite film is 1%-5% by mass, and the filler particles exist in the matrix in a monodisperse state.

Description

technical field [0001] The invention relates to a composite film comprising an organic flexible polymer matrix and organic-inorganic hybrid perovskite filler particles, and a preparation method thereof, belonging to the field of flexible electronics and optoelectronic materials. Background technique [0002] Flexible electronics is a highly cross-integrated subversive form of technology, which surpasses classical electronic systems in terms of apparent mechanical flexibility and greatly expands the application range of electronic devices. Ferroelectric materials have rich physical connotations due to the strong lattice-charge correlation, and exhibit ferroelectricity, piezoelectricity, and pyroelectricity. They are widely used in the fields of information storage and energy conversion, and are an important class of smart materials. Ferroelectric ceramics have excellent ferroelectric and piezoelectric properties, but their brittleness severely limits their applications in fle...

Claims

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Application Information

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IPC IPC(8): C08L27/16C08K5/17C08J5/18H01L41/18H01L41/37
CPCC08J5/18C08J2327/16C08K5/17C08K2201/005H10N30/852H10N30/092Y02E10/549
Inventor 王瑶黄辰张凌宇成子巍邓元
Owner BEIHANG UNIV
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