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Cu-doped double perovskite material and preparation method thereof

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

Active Publication Date: 2021-11-26
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Cu-doped double perovskite material and preparation method thereof
  • Cu-doped double perovskite material and preparation method thereof
  • Cu-doped double perovskite material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] (1) CsBr, AgBr, BiBr 3 、CuBr 2 Mix according to the molar ratio of 2.00:0.95:0.95:0.10, add to 15mL of hydrobromic acid, heat and stir at 110°C for about 2 hours, and obtain a precursor solution with a concentration of 0.07M;

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

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

[0033] Cs obtained in the present embodiment 1 2 (Ag 0.95 Bi 0.95 Cu 0.10 )Br 6 The physical picture of the crystal is as figure 1 Shown, comparative example Cs 2 AgBr 6 For orange-red crystals, and Cs 2 (Ag 0.95 Bi 0.95 Cu 0.10 )Br 6 For dark brown crystals.

[0034] With present embodiment 1 gained Cs 2 (Ag 0....

Embodiment 2

[0038] (1) CsBr, AgBr, BiBr 3 、CuBr 2 Mix according to the molar ratio of 2.00:0.95:0.95:0.10, add to 20mL hydrobromic acid, heat and stir at 110°C for about 2 hours, and obtain a precursor solution with a concentration of 0.05M;

[0039] (2) quickly transfer the precursor solution to a polytetrafluoroethylene reactor, and heat and keep it at 170°C for 24h;

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

[0041] Gained Cs in this embodiment 2 2 (Ag 0.95 Bi0 .95 Cu 0.10 )Br 6 Crystal size, performance are similar to Example 1.

Embodiment 3

[0043] (1) CsBr, AgBr, BiBr 3 、CuBr 2 Mix according to the molar ratio of 2.00:0.90:0.90:0.20, add to 20mL hydrobromic acid, heat and stir at 115°C for about 3 hours, and obtain a precursor solution with a concentration of 0.07M;

[0044] (2) The precursor solution is quickly transferred to a polytetrafluoroethylene reactor, and heated at 150° C. for 36 hours;

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

[0046] The Cs obtained in Example 3 2 (Ag 0.90 Bi 0.90 Cu 0.20 )Br 6 The grain size distribution of the crystal is 50-200 μm (see figure 2 ), the crystal structure remains Cs 2 AgBr 6 The cubic phase structure of the perovskite phase (see image 3 ). Light absorption intensity and comparative example 1Cs 2 AgBr 6 Com...

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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 Cs2 (Ag1-xBi1-xCu2x) Br6, wherein x is more than 0 and less than 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, and belongs 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, and the raw material cost is low, and the device is easy to process, showing broad application prospects. The two main challenges facing the further development of organic-inorganic hybrid perovskite photovoltaic materials are the intrinsic stability of the material and the environmental friendliness of the lead element. The use of non-toxic / low-toxic elements to replace lead elements to construct environmentally friendly and stable lead-free perovsk...

Claims

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Application Information

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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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