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Dual-emission Mn-doped CsPb(Cl/Br)3 perovskite nanocrystal and preparation method thereof

A nanocrystal and perovskite technology, applied in nanotechnology, nanooptics, nanotechnology, etc., can solve the problems of cumbersome preparation process and limited practical application, and achieve the effect of simple equipment, low price of raw materials, and easy operation.

Active Publication Date: 2017-05-31
SOUTHEAST UNIV
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Problems solved by technology

However, the development of nanocrystals in the past few decades has mainly focused on Cd-type quantum dots. Although its preparation method is very mature, the preparation process is relatively cumbersome, and the reaction needs to be carried out at high temperature and protected by an inert gas, which greatly limits the development of nanocrystals. its practical application

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  • Dual-emission Mn-doped CsPb(Cl/Br)3 perovskite nanocrystal and preparation method thereof
  • Dual-emission Mn-doped CsPb(Cl/Br)3 perovskite nanocrystal and preparation method thereof
  • Dual-emission Mn-doped CsPb(Cl/Br)3 perovskite nanocrystal and preparation method thereof

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Embodiment

[0022] PbBr used in experiments 2 ,Cs(OA),MnCl 2 Powder and other raw materials are analytical reagents, the solvent is hexane, and the ligands are N-methyloctylamine and oleic acid. The glass instruments used are rinsed with deionized water three times before use and then vacuum-dried. Prepare nanocrystals according to the following steps:

[0023] 1. Preparation of Pb precursor: dissolve 1 mmol PbBr at room temperature 2 In 1ML DMF.

[0024] 2. Preparation of Cs precursor: Dissolve 1mmol Cs(OA) in 1ML DMF at room temperature.

[0025] 3. Preparation of Mn precursor: dissolve 5mmol MnCl at room temperature 2 Dissolve in 1ML DMF.

[0026] 4. Preparation of reaction precursor solution: Dissolve 0.8ML N-methyloctylamine and 6ML oleic acid in 30ML hexane at room temperature.

[0027] 5. Preparation of dual emission Mn-doped CsPb(Cl / Br) 3 Perovskite nanocrystals, comprising the steps of:

[0028] (1) Microemulsion method CsPbBr 3 Preparation of nanocrystals: at room tempe...

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Abstract

The invention discloses an oil-soluble Mn-doped CsPb(Cl / Br)3 dual-emission nanocrystal and a preparation method thereof. The preparation method comprises the following steps: (1) synthesizing an all-inorganic CsPbBr3 perovskite nanocrystal precursor; and (2) carrying out halide-ion-exchange-assisted Mn-to-Pb ion exchange. The preparation method is carried out at room temperature, is simple in process and easy to operate, has the advantages of convenient raw material supply and low raw material price, can be completed in a common chemical laboratory, and thus, is easy to popularize. The Mn-doped CsPb(Cl / Br)3 nanocrystal has two emission peaks (perovskite intrinsic emission and Mn ion emission). The Mn-doped CsPb(Cl / Br)3 dual-emission nanocrystal obtained by the preparation method has high 56% fluorescence quantum yield, and can be used for manufacturing ratiometric temperature probes by utilizing the dual-peak-intensity temperature dependence characteristic.

Description

technical field [0001] The invention relates to a double emission Mn doped CsPb(Cl / Br) 3 The preparation of perovskite nanocrystal belongs to chemistry and nanometer material technology. Background technique [0002] In recent years, nanocrystalline materials have attracted much attention due to their unique quantum confinement effect and excellent optical properties. This type of material has the advantages of adjustable emission wavelength, narrow emission peak half-width, strong fluorescence intensity, etc., and can be widely used in lighting equipment, lasers, and solar cells. However, the development of nanocrystals in the past few decades has mainly focused on Cd-type quantum dots. Although its preparation method is very mature, the preparation process is relatively cumbersome, and the reaction needs to be carried out at high temperature and protected by an inert gas, which greatly limits the development of nanocrystals. its practical application. [0003] At presen...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/665
Inventor 王春雷黄光光徐淑宏崔一平
Owner SOUTHEAST UNIV
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