CN113528127A - A kind of preparation method of manganese-doped copper-based halide perovskite powder - Google Patents

A kind of preparation method of manganese-doped copper-based halide perovskite powder Download PDF

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CN113528127A
CN113528127A CN202110946748.0A CN202110946748A CN113528127A CN 113528127 A CN113528127 A CN 113528127A CN 202110946748 A CN202110946748 A CN 202110946748A CN 113528127 A CN113528127 A CN 113528127A
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manganese
halide perovskite
copper
based halide
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王春雷
瞿俊峰
徐淑宏
崔一平
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Southeast University
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Abstract

本发明公开了一种锰掺杂铜基卤化物钙钛矿粉末及其制备方法,该锰掺杂铜基卤化物钙钛矿为Mn:Cs3Cu2I5,所述制备方法为:(1)将碘化铯与碘化亚铜混合后充分研磨,得到铜基卤化物钙钛矿粉末;(2)将步骤(1)制得的铜基卤化物钙钛矿粉末与四水合氯化锰混合后充分研磨,得到锰掺杂的铜基卤化物钙钛矿粉末。本发明操作简单,可以大批量生产,且制得的锰掺杂铜基卤化物钙钛矿粉末发光可调。

Figure 202110946748

The invention discloses a manganese-doped copper-based halide perovskite powder and a preparation method thereof. The manganese-doped copper-based halide perovskite is Mn:Cs 3 Cu 2 I 5 , and the preparation method is: ( 1) fully grinding the cesium iodide and cuprous iodide to obtain copper-based halide perovskite powder; (2) mixing the copper-based halide perovskite powder obtained in step (1) with tetrahydrate chlorination The manganese is mixed and thoroughly ground to obtain manganese-doped copper-based halide perovskite powder. The invention has simple operation, can be mass-produced, and the prepared manganese-doped copper-based halide perovskite powder has adjustable light emission.

Figure 202110946748

Description

Preparation method of manganese-doped copper-based halide perovskite powder
Technical Field
The invention relates to a manganese-doped copper-based halide perovskite and a preparation method thereof, belonging to the field of photoelectric functional materials.
Background
In recent years, halide perovskites are considered to be good candidate materials for next-generation light-emitting devices due to the advantages of simple preparation method, low cost, easy regulation and control of light emission and the like. The traditional lead-based halide perovskites have certain limitations in practical application due to poor stability and toxicity of lead elements. Copper-based halide perovskites are believed to be expected to address both of these issues while maintaining a high fluorescence quantum yield of lead-based halide perovskites. There are two main approaches to fluorescence modulation of halide perovskites: (1) the energy gap is adjusted by changing the halogen composition, so that the intrinsic fluorescence peak position is changed; (2) impurity level is introduced by doping to realize impurity fluorescence. Both of these methods have certain difficulties in copper-based halide perovskites: halogen exchange can greatly reduce the fluorescence quantum yield, and the fluorescence regulation range is far smaller than that of lead-based halide perovskite. Cation doping is realized at a high temperature of 450 ℃, the process is complex and the cost is increased. Therefore, a new doping method needs to be provided, which can realize the doping of cations and reduce the reaction temperature, so as to realize the low-cost regulation and control of the luminescence of the copper-based halide perovskite.
Disclosure of Invention
The invention aims to provide manganese-doped copper-based halide perovskite powder and a preparation method thereof, which can reduce the temperature required by doping and realize the fluorescence regulation and control of the copper-based halide perovskite by manganese doping.
In order to achieve the purpose, the invention adopts the technical scheme that:
a process for preparing the Mn-doped Cu-base halide perovskite powder (Mn: Cs)3Cu2I5The preparation method comprises the following steps:
(1) preparation of copper-based halide perovskite Cs3Cu2I5: mixing cesium iodide powder and cuprous iodide powder, and then fully grinding to obtain copper-based halide perovskite powder;
(2) preparation of manganese-doped copper-based halide perovskite Mn: Cs3Cu2I5: and (2) mixing the copper-based halide perovskite powder prepared in the step (1) with manganese chloride tetrahydrate, and then fully grinding to obtain manganese-doped copper-based halide perovskite powder.
In the step (1), the stoichiometric ratio of cesium iodide powder to cuprous iodide powder is 3: 2.
In the step (2), the dosage of the manganese chloride tetrahydrate is 0-15% in terms of Mn/Cu molar ratio, but 0% is not included.
In the steps (1) and (2), the grinding time is more than 20 minutes.
In the steps (1) and (2), the grinding is one of the following three grinding modes: (a) grinding by adding raw materials only, (b) grinding by adding raw materials and silicon dioxide powder, (c) grinding by adding raw materials and 10-50 ml of buffer solution.
The buffer solution is one of n-hexane, toluene and octadecene; if octadecene is added as buffer for grinding, it is necessary to wash for 2-3 times with n-hexane and then dry, and if n-hexane or toluene is added as buffer for grinding, it is dried directly.
Has the advantages that: compared with the prior art, the manganese-doped copper-based halide perovskite and the preparation method thereof provided by the invention have the following advantages:
(1) the method has the advantages of simple operation, high material utilization rate, small dependence on equipment and short preparation period;
(2) the copper-based halide perovskite powder with higher fluorescence quantum yield can be produced in large batch;
(3) the doping of manganese can introduce an impurity fluorescence peak with a peak value at 540 nm;
(4) the relative intensity of the intrinsic fluorescence peak and the impurity fluorescence can be adjusted by changing the feed ratio of manganese.
Drawings
FIG. 1 is a graph showing the results of fluorescence spectrum characterization of copper-based halide perovskite powders of different manganese doping concentrations prepared in examples 1 to 5;
FIG. 2 is a CIE coordinate diagram corresponding to the fluorescence spectra of copper-based halide perovskite powders with different manganese doping concentrations prepared in examples 1-5 and an application example of the copper-based halide perovskite powders as color conversion layers for light emitting diodes;
FIG. 3 is a graph showing the X-ray diffraction spectrum characterization results of copper-based halide perovskites of different manganese doping concentrations prepared in examples 1-5;
FIG. 4 is an X-ray photoelectron spectroscopy characterization of manganese-doped copper-based halide perovskites prepared in example 2 at a Mn/Cu molar ratio of 7.5% doping concentration;
FIG. 5 is a scanning electron microscopy characterization of manganese-doped copper-based halide perovskites prepared in example 2 at a Mn/Cu molar ratio of 7.5% doping concentration;
FIG. 6 is a schematic diagram of a manganese doped copper-based halide perovskite energy level structure;
FIG. 7 is a schematic process flow diagram of the preparation method of the present invention.
Detailed Description
The invention is explained in more detail below with reference to exemplary embodiments and the accompanying drawings.
Example 1
Preparation of undoped copper-based halide perovskite powder: 77.94 mg cesium iodide was mixed with 38.09 mg cuprous iodide and directly ground for 25 minutes to obtain copper-based halide perovskite powder.
Example 2
(1) Preparation of copper-based halide perovskite powder: mixing 77.94 mg of cesium iodide and 38.09 mg of cuprous iodide, and directly grinding for 25 minutes to obtain copper-based halide perovskite powder;
(2) preparing manganese-doped copper-based halide perovskite powder: and (3) adding 3 mg of manganese chloride tetrahydrate (the molar ratio of Mn to Cu is 7.5%) into the prepared copper-based lead-free perovskite powder, mixing, adding 30ml of n-hexane, grinding for 30 minutes, filtering and drying the suspension to obtain the manganese-doped copper-based lead-free perovskite powder.
Example 3
(1) Preparation of copper-based halide perovskite powder: mixing 779.4 mg of cesium iodide and 380.9 mg of cuprous iodide, and directly grinding for 25 minutes to obtain copper-based lead-free perovskite powder;
(2) preparing manganese-doped copper-based halide perovskite powder: and taking the prepared copper-based lead-free perovskite powder, adding 19.8 mg of manganese chloride tetrahydrate (the molar ratio of Mn/Cu is 5%), mixing, adding 30ml of n-hexane, grinding for 30 minutes, filtering and drying the suspension to obtain the manganese-doped copper-based lead-free perovskite powder.
Example 4
(1) Preparation of copper-based halide perovskite powder: mixing 1558.8 mg of cesium iodide and 761.8 mg of cuprous iodide, directly adding 20mL of toluene, grinding for 30 minutes, filtering and drying the suspension to obtain copper-based lead-free perovskite powder;
(2) preparing manganese-doped copper-based halide perovskite powder: and (3) adding 79.2 mg of tetrahydrated manganese chloride (the molar ratio of Mn to Cu is 10%) into the prepared copper-based lead-free perovskite powder, mixing, adding 20mL of toluene, grinding for 30 minutes, filtering and drying the suspension to obtain the manganese-doped copper-based lead-free perovskite powder.
Example 5
(1) Preparation of copper-based halide perovskite powder: mixing 3897 mg of cesium iodide and 1904.5 mg of cuprous iodide, directly adding 10mL of octadecene, grinding for 30 minutes, cleaning the suspension with n-hexane for 2 times, filtering, and drying to obtain copper-based lead-free perovskite powder;
(2) preparing manganese-doped copper-based halide perovskite powder: and adding 296.7 mg of manganese chloride tetrahydrate (the molar ratio of Mn to Cu is 15%) into the prepared copper-based lead-free perovskite powder, mixing, adding 10mL of octadecene, grinding for 30 minutes, cleaning the suspension with n-hexane for 2 times, filtering and drying to obtain the manganese-doped copper-based lead-free perovskite powder.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.

Claims (6)

1.一种锰掺杂铜基卤化物钙钛矿粉末,其特征在于:该锰掺杂铜基卤化物钙钛矿为Mn:Cs3Cu2I5,其制备方法包括以下步骤:1. A manganese-doped copper-based halide perovskite powder is characterized in that: the manganese-doped copper-based halide perovskite is Mn:Cs 3 Cu 2 I 5 , and its preparation method comprises the following steps: (1)制备铜基卤化物钙钛矿Cs3Cu2I5:碘化铯粉末与碘化亚铜粉末混合后充分研磨,得到铜基卤化物钙钛矿Cs3Cu2I5粉末;(1) Preparation of copper-based halide perovskite Cs 3 Cu 2 I 5 : cesium iodide powder and cuprous iodide powder are mixed and fully ground to obtain copper-based halide perovskite Cs 3 Cu 2 I 5 powder; (2)制备锰掺杂的铜基卤化物钙钛矿Mn:Cs3Cu2I5:将步骤(1)制得的铜基卤化物钙钛矿Cs3Cu2I5粉末与四水合氯化锰混合后充分研磨,得到锰掺杂的铜基卤化物钙钛矿粉末。(2) Preparation of manganese-doped copper-based halide perovskite Mn:Cs 3 Cu 2 I 5 : the copper-based halide perovskite Cs 3 Cu 2 I 5 powder obtained in step (1) was mixed with chlorine tetrahydrate After the manganese is mixed, it is fully ground to obtain manganese-doped copper-based halide perovskite powder. 2.根据权利要求1所述的锰掺杂铜基卤化物钙钛矿的制备方法,其特征在于:所述步骤(1)中,碘化铯粉末与碘化亚铜粉末化学计量比为3:2。2. the preparation method of manganese-doped copper-based halide perovskite according to claim 1, is characterized in that: in described step (1), cesium iodide powder and cuprous iodide powder stoichiometric ratio is 3 :2. 3.根据权利要求1所述的锰掺杂铜基卤化物钙钛矿的制备方法,其特征在于:所述步骤(2)中,四水合氯化锰的用量按照Mn/Cu摩尔比计,为0%-15%,但不包括0%。3. the preparation method of manganese-doped copper-based halide perovskite according to claim 1, is characterized in that: in described step (2), the consumption of manganese chloride tetrahydrate is according to Mn/Cu mol ratio, 0%-15%, but not including 0%. 4.根据权利要求1所述的锰掺杂铜基卤化物钙钛矿的制备方法,其特征在于:所述步骤(1)、(2)中,研磨时间为20分钟以上。4 . The method for preparing manganese-doped copper-based halide perovskite according to claim 1 , wherein in the steps (1) and (2), the grinding time is more than 20 minutes. 5 . 5.根据权利要求1或4所述的锰掺杂铜基卤化物钙钛矿的制备方法,其特征在于:所述步骤(1)、(2)中,研磨为如下三种研磨方式的一种:(a)只加原料进行研磨,(b)加原料和二氧化硅粉末进行研磨,(c)加原料和10-50毫升缓冲液进行研磨。5. the preparation method of manganese-doped copper-based halide perovskite according to claim 1 or 4, is characterized in that: in described step (1), (2), grinding is one of following three grinding modes Types: (a) grinding with raw materials only, (b) grinding with raw materials and silica powder, (c) grinding with raw materials and 10-50 ml buffer. 6.根据权利要求5所述的锰掺杂铜基卤化物钙钛矿的制备方法,其特征在于:所述缓冲液为正己烷、甲苯、十八烯的一种;若加十八烯作为缓冲液进行研磨,则需要用正己烷清洗2-3遍后干燥,若加正己烷或甲苯作为缓冲液进行研磨,则直接干燥。6. the preparation method of manganese-doped copper-based halide perovskite according to claim 5, is characterized in that: described buffer solution is a kind of n-hexane, toluene, octadecene; For grinding with buffer solution, it needs to be washed 2-3 times with n-hexane and then dried. If n-hexane or toluene is added as a buffer for grinding, it is directly dried.
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Cited By (3)

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CN115124994A (en) * 2022-05-25 2022-09-30 福建江夏学院 Synthesis method and product of a novel cesium ammonium copper iodide perovskite material with enhanced fluorescence
KR20240006396A (en) * 2022-07-06 2024-01-15 서울과학기술대학교 산학협력단 Method of fabricating blue-emitting nanoparticles
CN118495577A (en) * 2024-07-17 2024-08-16 中国科学技术大学 Copper-based halide powder, scintillator film, preparation method and application thereof

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115124994A (en) * 2022-05-25 2022-09-30 福建江夏学院 Synthesis method and product of a novel cesium ammonium copper iodide perovskite material with enhanced fluorescence
KR20240006396A (en) * 2022-07-06 2024-01-15 서울과학기술대학교 산학협력단 Method of fabricating blue-emitting nanoparticles
KR102696629B1 (en) 2022-07-06 2024-08-20 서울과학기술대학교 산학협력단 Method of fabricating blue-emitting nanoparticles
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Application publication date: 20211022