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Organic-inorganic hybrid perovskite material with high fluorescence efficiency and preparation method thereof

A technology of perovskite materials and fluorescent materials, which is applied in the field of organic-inorganic hybrid perovskite materials with high fluorescence efficiency and its preparation, and can solve the problems of difficult regulation of fluorescence emission wavelength, low fluorescence efficiency, and expensive raw materials

Active Publication Date: 2016-04-20
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] Traditional green fluorescent materials are mainly composed of raw materials such as rare earth oxides, which are relatively expensive, and the production process often requires high energy-consuming processes such as roasting, and it is difficult to control the fluorescence emission wavelength (Zhang Jilin, Hong Guangyan. Research progress on rare earth nanoluminescent materials[J ]. Luminescent Journal, 2005,26(3):285-293.) Therefore, it is of practical significance to develop a high-efficiency fluorescent material with simple preparation process and low cost
CH 3 NH 3 wxya 3 The organic-inorganic hybrid perovskite material is a new type of photovoltaic material. Its synthetic material reserves are abundant and the synthesis conditions are mild, making it an ideal substitute for existing fluorescent light-emitting materials. However, the existing hybrid perovskite fluorescent The preparation process of the material requires toxic solvents such as toluene and low fluorescence efficiency, which limits its large-scale application

Method used

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  • Organic-inorganic hybrid perovskite material with high fluorescence efficiency and preparation method thereof
  • Organic-inorganic hybrid perovskite material with high fluorescence efficiency and preparation method thereof
  • Organic-inorganic hybrid perovskite material with high fluorescence efficiency and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A fluorescent material whose molecular formula is 5-ACA 0.48 ·CH 3 NH 3 PbBr 3 .

[0030] The above-mentioned method for preparing a fluorescent material specifically includes the following steps:

[0031] (1), preparation of fluorescent material precursor solution

[0032] 0.056g of 5-aminovaleric acid, 0.119g of CH 3 NH 3 Br and 0.3670gPbBr 2 Dissolve in 1ml dimethylformamide to obtain fluorescent material precursor solution;

[0033] The above-mentioned 5-aminovaleric acid, CH 3 NH 3 Br and PbBr 2 Calculated as 0.48:1:1 based on the molar ratio.

[0034] (2) Coating of fluorescent materials

[0035] The precursor solution obtained in step (1) was spin-coated at a rate of 4000 R / min for 30 s and dried at room temperature on a substrate to obtain a device coated with a fluorescent material. The absolute quantum efficiency of the sample was 42%.

[0036] figure 1 It is the X-ray diffraction spectrum of Example 1, from which it can be concluded that the cry...

Embodiment 2

[0040] A fluorescent material whose molecular formula is 5-ACA 0.12 ·CH 3 NH 3 PbBr 3 .

[0041] The above-mentioned method for preparing a fluorescent material specifically includes the following steps:

[0042] (1), preparation of fluorescent material precursor solution

[0043] 0.014g of 5-aminovaleric acid, 0.119g of CH 3 NH 3 Br and 0.3670gPbBr 2 Dissolve in 1ml dimethylformamide to obtain fluorescent material precursor solution;

[0044] The above-mentioned 5-aminovaleric acid, CH 3 NH 3 Br and PbBr 2 Calculated as 0.12:1:1 by molar ratio.

[0045] (2) Coating of fluorescent materials

[0046] The precursor solution obtained in step (1) was spin-coated at a rate of 4000 R / min for 30 s and dried at room temperature on a substrate to obtain a device coated with a fluorescent material. The absolute quantum efficiency of the sample was 25%.

[0047] Figure 6 It is the fluorescence emission spectrum of the sample obtained in Example 2, from which it can be observ...

Embodiment 3

[0049] A fluorescent material whose molecular formula is GABA 0.1 ·CH 3 NH 3 PB 3 .

[0050] The above-mentioned method for preparing a fluorescent material specifically includes the following steps:

[0051] (1), preparation of fluorescent material precursor solution

[0052] 0.0103g 4-aminobutyric acid, 0.119g CH 3 NH 3 Br and 0.461gPbI 2 Dissolve in 1ml dimethyl sulfoxide to obtain fluorescent material precursor solution;

[0053] The above-mentioned 4-aminobutyric acid, CH 3 NH 3 Br and PbI 2 The molar ratio is calculated as 0.1:1:1.

[0054] (2) Coating of fluorescent materials

[0055] The precursor solution obtained in step (1) was spin-coated at a rate of 3000 R / min for 60 s and dried at room temperature on a substrate to obtain a device coated with a fluorescent material. The absolute quantum efficiency of the sample was 16%.

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Abstract

The invention provides an organic-inorganic hybrid perovskite material with high fluorescence efficiency and a preparation method thereof. The structure of the organic-inorganic hybrid perovskite material with high fluorescence efficiency is a perovskite crystal form. Molecular formula of the material is Ay.CH3NH3PbX3, wherein A is amino acid; y is less than 0.5 and greater than 0.1; and X is at least one of Cl, Br and I. According to the preparation method, amino acid, methylamine salt (MAX) and lead halide (PbX2) are directly dissolved in a solvent, and a substrate is coated with the solution and then dried so as to obtain the corresponding organic-inorganic hybrid perovskite material with high fluorescence efficiency. The fluorescent material has characteristics of low production cost and high fluorescence efficiency. By adjusting content of amino acid, fluorescent light of different emission wavelength can be obtained.

Description

technical field [0001] The invention relates to an organic-inorganic hybrid perovskite material and a preparation method, in particular to an organic-inorganic hybrid perovskite material with high fluorescence efficiency and a preparation method. Background technique [0002] Traditional green fluorescent materials are mainly composed of raw materials such as rare earth oxides, which are relatively expensive, and the production process often requires high energy-consuming processes such as roasting, and it is difficult to control the fluorescence emission wavelength (Zhang Jilin, Hong Guangyan. Research progress on rare earth nanoluminescent materials[J ]. Luminescent Journal, 2005,26(3):285-293.) Therefore, it is of great practical significance to develop a high-efficiency fluorescent material with simple preparation process and low cost. CH 3 NH 3 wxya 3 The organic-inorganic hybrid perovskite material is a new type of photovoltaic material. Its synthetic material reser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06
CPCC09K11/06C09K2211/10
Inventor 赵一新钱旭芳张太阳李戈岳东亭阚淼郭男杰贾爱华
Owner SHANGHAI JIAO TONG UNIV
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