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Preparation method of perovskite quantum dot composite

A technology of perovskite and quantum dots, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as low efficiency and cumbersome methods, and achieve less operation steps and simple methods , optimize the effect of stability

Pending Publication Date: 2018-12-21
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is cumbersome and inefficient

Method used

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  • Preparation method of perovskite quantum dot composite

Examples

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Embodiment 1

[0031] Preparation of CH 3 NH 3 PbBr 3 Perovskite Quantum Dot Composite

[0032] S1, the CH 3 NH 3 Br, PbBr 2 mixed with N,N-dimethylformamide, where, CH 3 NH 3 Br and PbBr 2 The ratio of the amount of substance is 5:1, N,N-dimethylformamide and PbBr 2 The mass ratio is 50:1. Mix evenly and stir under the protection of argon to obtain a perovskite precursor mixed liquid.

[0033] S2. Add polystyrene microspheres with a particle size of 3 μm to the above perovskite precursor mixture, wherein the mass of polystyrene microspheres is the same as that of CH 3 NH 3 Br and PbBr 2 The total mass ratio is 4:1. Mix and stir evenly under the protection of argon to obtain the perovskite quantum dot polymer microsphere mixture.

[0034] S3. Centrifuge the above perovskite quantum dot polymer microsphere mixture, pour off the supernatant, take out the precipitate and pour it into a glass dish, put the glass dish on a baking board to heat, set the heating temperature to 60°C, a...

Embodiment 2

[0038] Preparation of CsPbBr 3 Perovskite Quantum Dot Composite

[0039] S1, the CsBr, PbBr 2 Mixed with dimethyl sulfoxide, among them, CsBr and PbBr 2 The ratio of the amount of substance is 2:1, DMSO to PbBr 2 The mass ratio is 100:1. Mix evenly and stir under the protection of argon to obtain a perovskite precursor mixed solution.

[0040] S2. Add polystyrene microspheres with a particle size of 15 μm to the above perovskite precursor mixture, wherein the mass of polystyrene microspheres is the same as that of CsBr and PbBr 2 The total mass ratio is 3:1. Mix and stir evenly under the protection of argon to obtain the perovskite quantum dot polymer microsphere mixture.

[0041] S3. Centrifuge the above perovskite quantum dot polymer microsphere mixture, pour off the supernatant, take out the precipitate and pour it into a glass dish, put the glass dish on a baking board to heat, set the heating temperature to 80°C, and the heating time 2h, to get CsPbBr 3 Perovskite...

Embodiment 3

[0045] Preparation of CH 3 NH 3 PbBr 3 Perovskite Quantum Dot Composite

[0046] S1, the CH 3 NH 3 Br, PbBr 2 mixed with N,N-dimethylformamide, where, CH 3 NH 3 Br and PbBr 2 The ratio of the amount of substance is 6:1, N,N-dimethylformamide and PbBr 2 The mass ratio is 200:1. Mix evenly and stir under the protection of argon to obtain a perovskite precursor mixed liquid.

[0047] S2. Add polymethyl methacrylate microspheres with a particle size of 5 μm to the above perovskite precursor mixture, wherein the mass of polymethyl methacrylate microspheres is the same as that of CH 3 NH 3 Br and PbBr 2 The total mass ratio is 3:1. Mix and stir evenly under the protection of argon to obtain the perovskite quantum dot polymer microsphere mixture.

[0048] S3. Centrifuge the above perovskite quantum dot polymer microsphere mixture, pour off the supernatant, take out the precipitate and pour it into a glass dish, put the glass dish on a baking board to heat, set the heati...

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Abstract

The invention discloses a preparation method of a perovskite quantum dot composite, comprising the following steps: S1, mixing a first precursor and a second precursor with an organic solvent to obtain a perovskite precursor mixed liquid; S2, mixing the perovskite precursor mixed liquid in S1 with polymer microspheres to obtain a mixture of perovskite quantum dot polymer microspheres; S3, and subjecting the mixture of perovskite quantum dot polymer microspheres in S2 to solvent removal treatment to obtain the perovskite quantum dot composite. The preparation method of the perovskite quantum dot composite is simple, rapid, efficient and easy to operate, and can produce a perovskite quantum dot composite which is stable in air, is not easily quenched during light emitting, and can be furtherdirectly applied.

Description

technical field [0001] The present application relates to the field of luminescent materials, in particular to the field of quantum dots, and in particular to a method for preparing a perovskite quantum dot composite. Background technique [0002] Perovskite quantum dots have become one of the research hotspots in the field of semiconductor light-emitting materials because of their superior optoelectronic properties (such as easy tunable luminescence, narrow emission spectrum, high quantum efficiency, and convenient preparation, etc.). LEDs prepared from perovskite quantum dots have a wide color gamut (~140%), which even exceeds that of commercialized OLEDs. Perovskite quantum dots are showing great application value in next-generation displays. [0003] At present, perovskite quantum dot-based luminescent materials generally have problems such as poor stability and easy quenching of luminescence in air, making it difficult for subsequent applications. At present, perovski...

Claims

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Application Information

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IPC IPC(8): C09K11/06C09K11/66B82Y20/00B82Y30/00B82Y40/00
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/06C09K11/664C09K11/665
Inventor 王允军孙雅娟刘志军李敬群
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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