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Near-infrared absorption perovskite nano material, preparation method and application thereof

A nanomaterial and perovskite technology, applied in the field of nanomaterials, can solve the problems of small absorption range of nanoparticles, achieve excellent stability, simple operation, and less time-consuming effects

Active Publication Date: 2020-09-08
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a near-infrared absorbing perovskite nanomaterial and its preparation method and application, aiming at solving the problem of existing Cs 2 PdBr 6 Nanoparticles have a small absorption range in the near-infrared region

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  • Near-infrared absorption perovskite nano material, preparation method and application thereof
  • Near-infrared absorption perovskite nano material, preparation method and application thereof
  • Near-infrared absorption perovskite nano material, preparation method and application thereof

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Embodiment 1

[0058] 1. A near-infrared absorbing perovskite nanomaterial Cs 2 PdBr 6 :Mn 2+ The preparation method specifically comprises the following steps:

[0059] (1)Cs 2 PdBr 6 :Mn 2+ Preparation of perovskite micron materials: accurately weigh 0.213g CsBr (purity is 99.99%), 0.133g PdBr 2 (99% pure) and 0.011g MnBr 2 (purity is 99%), be dissolved in 5ml mass fraction and be 48% in hydrobromic acid aqueous solution, heat and stir at 85 ℃ and make it dissolve completely and form uniform and stable precursor solution, when precursor is completely in hydrobromic acid aqueous solution When dissolution forms a clear solution, raise the temperature to 120 °C and add 10% DMSO reagent to the precursor solution. After adding dimethyl sulfoxide to the solution, black crystals precipitated, cooled to room temperature, washed and centrifuged with anti-solvent toluene and deionized water several times, and dried in an oven at 70°C for 12 hours to obtain Cs 2 PdBr 6 :Mn 2+ micron materia...

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Abstract

The invention discloses a near-infrared absorption perovskite nano material, a preparation method and application thereof. The perovskite nano material is a divalent manganese ion doped Cs2PdX6 nano material, wherein X is Br, I, SCN or a combination thereof. The divalent manganese ion doped Cs2PdX6 nano material is synthesized for the first time by adopting a simple and coherent anti-solvent method, and Mn<2+> is used for doping Cs2PdX6 to expand the absorption range of Cs2PdX6 in a near-infrared region. The method is simple to operate and low in time consumption, and the prepared divalent manganese ion doped Cs2PdX6 nano material has remarkable absorption in a near-infrared region. And the divalent manganese ion doped Cs2PdX6 nano material has excellent stability, band gap tunability andparticle size controllability. The perovskite nano material has a wide application prospect in the aspects of solar cells, photoelectric detection, memory storage, medical drug detection and the like.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a near infrared absorbing perovskite nanomaterial and its preparation method and application. Background technique [0002] Near-infrared absorbing materials refer to materials whose absorption spectrum is in the near-infrared region, which can absorb photons for energy conversion. due to Cs 2 PdBr 6 The optical band gap is relatively narrow, the particle size is controllable, and it is stable in the air. It is very suitable as a near-infrared absorbing material. But Cs 2 PdBr 6 Nanoparticles have a small absorption range in the near-infrared region. [0003] Therefore, the prior art still needs to be improved and developed. Contents of the invention [0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a near-infrared absorbing perovskite nanomaterial and its preparation method and application, aiming at solv...

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Application Information

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IPC IPC(8): C09K11/61C09K11/56B82Y30/00B82Y40/00H01L31/0216H01L31/0256
CPCC09K11/616C09K11/572B82Y30/00B82Y40/00H01L31/02161H01L31/02167H01L31/0256Y02E10/50
Inventor 孟鸿刘铭陈经伟
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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