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A kind of Cu-doped double perovskite material and preparation method thereof

A double perovskite, precursor solution technology, applied in chemical instruments and methods, bismuth compounds, inorganic chemistry, etc., can solve the problems of limited application and weak light absorption ability, and achieve improved light absorption and light absorption intensity. Effect

Active Publication Date: 2022-07-12
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Cs 2 AgBr 6 The light absorption ability is relatively weak, which limits its further application in optoelectronic devices

Method used

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  • A kind of Cu-doped double perovskite material and preparation method thereof
  • A kind of Cu-doped double perovskite material and preparation method thereof
  • A kind of Cu-doped double perovskite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) CsBr, AgBr, BiBr 3 , CuBr 2 After mixing according to the molar ratio of 2.00:0.95:0.95:0.10, it was added to 15mL of hydrobromic acid, heated and stirred at 110°C for about 2h to obtain a precursor solution with a concentration of 0.07M;

[0031] (2) The precursor solution was quickly transferred to a polytetrafluoroethylene reaction kettle, and heated at 150°C for 24h;

[0032] (3) The reaction kettle was taken out and cooled naturally at room temperature. The reaction solution was taken out and filtered. The filtered part is washed with water and organic solvent respectively, and then vacuum dried to obtain Cs 2 (Ag 0.95 Bi 0.95 Cu 0.10 )Br 6 crystal.

[0033] Cs obtained in Example 1 2 (Ag 0.95 Bi 0.95 Cu 0.10 )Br 6 Real pictures of crystals such as figure 1 As shown, the comparative example Cs 2 AgBiBr 6 It is orange-red crystal, and Cs 2 (Ag 0.95 Bi 0.95 Cu 0.10 )Br 6 For dark brown crystals.

[0034] The Cs obtained in Example 1 2 (Ag ...

Embodiment 2

[0038] (1) CsBr, AgBr, BiBr 3 , CuBr 2 After mixing at a molar ratio of 2.00:0.95:0.95:0.10, it was added to 20 mL of hydrobromic acid, heated and stirred at 110 °C for about 2 h to obtain a precursor solution with a concentration of 0.05M;

[0039] (2) The precursor solution was quickly transferred to a polytetrafluoroethylene reaction kettle, and heated at 170°C for 24h;

[0040] (3) The reaction kettle was taken out and cooled naturally at room temperature. The reaction solution was taken out and filtered. The filtered part is washed with water and organic solvent respectively, and then vacuum dried to obtain Cs 2 (Ag 0.95 Bi 0.95 Cu 0.10 )Br 6 crystal.

[0041] Cs obtained in this example 2 2 (Ag 0.95 Bi0 .95 Cu 0.10 )Br 6 The crystal size and properties were similar to those of Example 1.

Embodiment 3

[0043] (1) CsBr, AgBr, BiBr 3 , CuBr 2 After mixing at a molar ratio of 2.00:0.90:0.90:0.20, it was added to 20 mL of hydrobromic acid, heated and stirred at 115°C for about 3 hours to obtain a precursor solution with a concentration of 0.07M;

[0044] (2) The precursor solution was quickly transferred to a polytetrafluoroethylene reaction kettle, and heated at 150°C for 36h;

[0045] (3) The reaction kettle was taken out and cooled naturally at room temperature. The reaction solution was taken out and filtered. The filtered part is washed with water and organic solvent respectively, and then vacuum dried to obtain Cs 2 (Ag 0.90 Bi 0.90 Cu 0.20 )Br 6 crystal.

[0046] Cs obtained in Example 3 2 (Ag 0.90 Bi 0.90 Cu 0.20 )Br 6 The grain size distribution of the crystals is 50 to 200 μm (see figure 2 ), the crystal structure remains Cs 2 AgBiBr 6 The cubic phase structure of the perovskite phase (see image 3 ). Optical absorption intensity and comparative exam...

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Abstract

The invention relates to a Cu-doped double perovskite material and a preparation method thereof. The chemical formula of the Cu-doped double perovskite material is Cs 2 (Ag 1‑x Bi 1‑x Cu 2x )Br 6 , 0<x<0.25.

Description

technical field [0001] The invention relates to a Cu-doped double perovskite material and a preparation method thereof, in particular to a method for improving the light absorption performance of a metal halide double perovskite material by doping Cu, belonging to the field of perovskite material preparation. Background technique [0002] Organic-inorganic hybrid perovskite materials have unique optoelectronic properties such as high molar extinction coefficient, adjustable band gap, and strong electron / hole transport ability, low cost of raw materials, and easy device processing, showing broad application prospects. The two main challenges currently facing the further development of organic-inorganic hybrid perovskite photovoltaic materials are the intrinsic stability of the materials and the environmental friendliness of lead. The use of non-toxic / low-toxic elements to replace lead elements to construct environmentally friendly and stable lead-free perovskites is an import...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G29/00
CPCC01G29/006C01P2002/72C01P2004/03C01P2004/61Y02E10/549
Inventor 黄富强秦鹏秦锦峰
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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