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Perovskite thin film packaging method for water environment and application of perovskite thin film packaging method

A technology of thin film encapsulation and perovskite, which is applied in the fields of nanomaterials and laser optics, can solve the problems of complex process and expensive, and achieve the effect of low laser threshold, strong emission intensity and simple method

Active Publication Date: 2022-07-01
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These solutions require expensive equipment and complex processes, so there is an urgent need for a simple and economical packaging solution that can effectively inhibit the decomposition of perovskite and expand its application range

Method used

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  • Perovskite thin film packaging method for water environment and application of perovskite thin film packaging method
  • Perovskite thin film packaging method for water environment and application of perovskite thin film packaging method
  • Perovskite thin film packaging method for water environment and application of perovskite thin film packaging method

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Embodiment 1

[0028] figure 1 It is a schematic diagram of a method for encapsulating a perovskite film by photopolymerization according to Embodiment 1 of the present invention. like figure 1 As shown, the steps of the method include:

[0029] (1) In a dark room environment, use a pipette to drop 100 μl of tricyclodecanedimethanol diacrylic acid monomer onto a 1.5 cm×1.5 cm quartz plate, and cover it with an identical quartz plate with a spacing of 500 μm.

[0030] (2) Irradiate with a UV LED lamp in a dark room environment, and the lamp power is set to 50μW / cm 2， Acrylic acid undergoes photopolymerization, and after 10 minutes of irradiation to form a film, the acrylic base film obtained from the upper glass slide is peeled off to form a solid polymer layer 1 with a thickness of 400 μm;

[0031] (3) Treat the surface of the obtained acrylic substrate with an oxygen plasma cleaner.

[0032] (4) In a nitrogen glove box, mix 30 μl of MABr and PbBr with DFM as solvent 2 Spin-coating of p...

Embodiment 2

[0036] figure 2 A physical image of a sample working in water using acrylic-encapsulated perovskite films.

[0037] The liquid in the cuvette is deionized water, and the middle is the acrylic-encapsulated MAPbBr under optical pumping 3 film.

Embodiment 3

[0039] image 3 for MAPbBr prepared on acrylic substrates 3 Scanning electron microscope pictures of thin films. The successful formation of crystalline clusters, encapsulated MAPbBr, can be observed under the microscope 3 The thin film crystals are of good quality. image 3 The data in the middle are the absorption spectrum and PL spectrum of the perovskite film, and the surface has good optical properties.

[0040] The absorption spectrum was measured by a xenon lamp and a USB4000 fiber optic spectrometer, and the PL spectrum was excited by a 400 nm femtosecond pulsed laser and measured by a USB4000 fiber optic spectrometer.

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Abstract

The invention discloses a perovskite thin film packaging method for a water environment and application of the perovskite thin film packaging method, and belongs to the field of perovskite thin film packaging. The preparation method comprises the following steps: dripping an acrylic monomer on a glass slide, irradiating by using an ultraviolet LED lamp, and carrying out photopolymerization reaction on the monomer to generate a solid polymer layer 1; under a nitrogen protection condition, spin-coating a perovskite precursor solution on the solid polymer layer 1 to prepare a perovskite thin film; the perovskite thin film is filled and dispensed with an acrylic monomer, an ultraviolet LED lamp is used for irradiation, a polymerization reaction is carried out again, and a generated solid polymer layer 2 completely wraps the perovskite thin film in the middle. The influence of moisture and oxygen on the film is avoided, and the application range of the perovskite film is expanded. The packaged perovskite thin film can be directly used in a water area, and a lower laser threshold value and emission intensity are obtained.

Description

technical field [0001] The invention relates to a perovskite thin film encapsulation scheme suitable for water and its application, belonging to the fields of nanomaterials and laser optics. Background technique [0002] Halide perovskite materials are widely used in photovoltaics, light-emitting diodes and lasers due to their excellent optoelectronic properties. where APbX 3 (A is a cation, X is a halide anion) as a luminescent medium for lasers, it is widely used in optically pumped lasers, such as microcavity lasers, distributed feedback lasers, and random lasers. [0003] However, stability issues limit the further application of perovskite materials, and moisture in the air can degrade APbX 3 The crystal structure of the perovskite material breaks down, causing the device to fail. Currently, the protection of perovskite films is mainly achieved by encapsulation. At present, the main packaging method is to deposit materials such as aluminum oxide as a protective laye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/18C08J7/06C08J5/18C08L35/02C08F122/14C08F2/48
CPCC08J7/18C08J7/06C08J5/18C08F122/1006C08F2/48C08J2335/02Y02E10/549
Inventor 张峻赫郭金鑫张一伟张新平窦菲
Owner BEIJING UNIV OF TECH
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