Manganese-doped two-dimensional lead halide perovskite material with high photoluminescence quantum yield and preparation thereof

A technology of perovskite material and quantum yield, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of inability to realize controllable adjustment, cumbersome synthesis steps, and low quantum yield, and achieve a simple and fast preparation method, The effect of overcoming the preparation process and excellent optical properties

Active Publication Date: 2018-06-22
SHANTOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the quantum yield of this material is still low and requires prior synthesis (C 4 h 9 NH 3 ) 2 PbBr 4 Crystal, the synthesis steps are relatively cu

Method used

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  • Manganese-doped two-dimensional lead halide perovskite material with high photoluminescence quantum yield and preparation thereof
  • Manganese-doped two-dimensional lead halide perovskite material with high photoluminescence quantum yield and preparation thereof

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Experimental program
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Effect test

Embodiment 1

[0027] Add 4mmol ethylamine hydrobromide, 0.99mmol lead bromide and 0.01mmol manganese bromide successively in an agate mortar, grind for 10 minutes, the quantum yield of the obtained manganese-doped perovskite is 55%, and the Centered at 616nm.

[0028] The preparation method of ethylamine hydrobromide is as follows: add hydrobromic acid to ethylamine according to the molar ratio of 1:1, and stir in an ice bath for 15 minutes; After washing with ethanol, dry in an oven at 80°C.

Embodiment 2

[0030] Add 4mmol ethylamine hydrobromide, 0.95mmol lead bromide and 0.05mmol manganese bromide successively in an agate mortar and grind for 15 minutes. figure 2 As shown, its quantum yield is 90%, and the luminescent center is located at 616nm. The preparation of ethylamine hydrobromide is with embodiment 1.

Embodiment 3

[0032] Add 3mmol ethylamine hydrobromide, 1mmol ethylamine hydrochloride, 0.75mmol lead bromide, 0.25mmol lead chloride and 0.05mmol manganese bromide in sequence in an agate mortar, grind for 30 minutes, and the obtained manganese doped The quantum yield of the heterogeneous perovskite is 83%, and the luminescent center is located at 620nm. The preparation of ethylamine hydrobromide is with embodiment 1.

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Abstract

The invention relates to a preparation method of a manganese-doped two-dimensional lead halide perovskite material with the high photoluminescence quantum yield. The preparation method mainly comprises the following steps that (1) haloid acid is added into organic amine according to a 1:1 molar ratio, and ice-bath stirring is conducted for 15 minutes; (2) the solution is placed in a 80 DEG C drying oven overnight, till crystals are completely dissolved out; (3) the crystals are placed into the 80 DEG C drying oven to be dried after being washed clearly with absolute ethyl alcohol; and (4) organic halate, lead halide and manganese halide with certain proportion are added into a mortar and uniformly ground, and an end product is obtained. The general formula of the prepared manganese-doped lead halide perovskite meets (C<n>H<2n+1>NH3)2Pb<1-x>Mn<x>X4, wherein the value of x is between 0.001 and 0.95, the lead halide perovskite material has an excellent optical property, the luminescence center wavelength is between 595 and 630 nm, and the quantum yield emitted by Mn<2+> reaches 90%. By adjusting the chain length and the structure of organic amine salt and sorts of halide ions, controlling of the wavelength emitted by Mn<2+> is achieved, and the preparation method of manganese-doped two-dimensional lead halide perovskite is simple and rapid.

Description

technical field [0001] The invention belongs to the field of photoelectric materials, in particular to a manganese-doped two-dimensional lead halide perovskite material with high photoluminescence quantum yield and its preparation. Background technique [0002] Lead halide perovskites have been extensively studied in the field of photovoltaics and optoelectronics due to their tunable band gap, excellent optoelectronic properties and long excitonic lifetime. At the same time, doping can provide more diverse electromagnetic and optical properties in the semiconductor field, so it has also received extensive attention in the semiconductor field. So far, the preparation of manganese-doped lead halide perovskites mostly adopts the thermal injection method. Wenyong Liu et al. (J.Am.Chem.Soc.2016,138,14954-14961) successfully prepared Mn by thermal injection method 2+ Doped CsPbCl 3 Perovskite. This method is not only harsh on the preparation environment, but also the yield of ...

Claims

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Application Information

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IPC IPC(8): C09K11/66
CPCC09K11/664
Inventor 罗彬彬李先丽武庆贺郭妍
Owner SHANTOU UNIV
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