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A perovskite photoelectric functional material modified by organic small molecule halide, its preparation and application

A technology of optoelectronic functional materials and halides, which is applied in photovoltaic power generation, circuits, electrical components, etc., can solve problems such as poor optoelectronic performance, and achieve the effects of improving optoelectronic conversion efficiency, simple preparation method, and low cost of raw materials

Active Publication Date: 2021-10-08
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a perovskite photoelectric functional material modified by an organic small molecule halide, its preparation and application, which uses an organic halide small molecule to modify the perovskite base Photoelectric functional material ABX 3 Modification is carried out to obtain perovskite-based photoelectric functional materials, which can significantly improve the fill factor, and then obtain perovskite photoelectric functional materials with excellent electrical properties, and the preparation process is simple and low-cost, thereby solving the existing calcium Technical Problems of Poor Photoelectric Properties of Titanium Ore Materials

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  • A perovskite photoelectric functional material modified by organic small molecule halide, its preparation and application
  • A perovskite photoelectric functional material modified by organic small molecule halide, its preparation and application

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[0036] The present invention also provides the preparation method of the perovskite photoelectric functional material modified by the organic small molecule halide, which uses (A1) in the general chemical formula a (A2) b (A3) 1-a-b-z (B1) c (B2) 1-c (X1) d (X2) e (X3) 3-d-e It is a matrix, which is obtained by modifying the matrix with a small molecule halide, and its preparation specifically includes the following steps:

[0037] (1) preparing a perovskite precursor solution, wherein the perovskite precursor is the matrix;

[0038] (2) mixing an organic solution obtained by dissolving a small molecule halide in an organic solvent with the perovskite precursor solution to obtain a modified perovskite precursor solution;

[0039] (3) Annealing the modified perovskite precursor solution obtained in step (2) to obtain the perovskite photoelectric functional material modified by the organic small molecule halide.

[0040] In some embodiments, the organic solvent in step (...

Embodiment 1

[0046] In this embodiment, preferably M is FA-Cl hydrochloride, and A1 is CH 3 NH 3 + , B1 is Pb 2+ , X1 is I - , and z=0.2, a=0.8, c=1, d=3, the corresponding perovskite-based photoelectric functional material chemical formula is (FA-Cl) 0.2 (CH 3 NH 3 ) 0.8 PB 3 , the concrete implementation steps of this material preparation are as follows:

[0047] (1) Weigh 0.461g PbI 2 and 0.127g CH 3 NH 3 I (according to stoichiometric ratio 1:0.8) is completely dissolved in 0.8mlDMF to obtain solution A;

[0048] (2) Weigh 0.0230g FA-Cl hydrochloride (relative to (FA-Cl) 0.2 (CH 3 NH 3 ) 0.8 PB 3 20% of the amount fraction of the substance) was completely dissolved in 0.2ml DMSO to obtain solution B;

[0049] (3) Add solution B to solution A and fully mix to obtain perovskite precursor solution C modified by chloroformamidine;

[0050] (4) Take an appropriate amount of perovskite precursor solution C and fill it in a mesoscopic solar cell based on a carbon counter ele...

Embodiment 2

[0056] In the present embodiment, preferred M is FA-Br hydrobromide, and A1 is HCNH 2 NH 2 + , B1 is Pb 2+ , X1 is I - , and z=0.1, a=0.9, c=1, d=3, the corresponding perovskite-based photoelectric functional material chemical formula is (FA-Br) 0.1 (HCNH 2 NH 2 ) 0.9 PB 3 , the concrete implementation steps of this material preparation are as follows:

[0057] (1) Weigh 0.461g PbI 2 and 0.155g HCNH 2 NH 2 I (according to stoichiometric ratio 1:0.9) was completely dissolved in 0.8ml DMF to obtain solution A;

[0058] (2) Weigh 0.0204g bromoformamidine hydrobromide (relative to (FA-Br) 0.1 (HCNH 2 NH 2 ) 0.9 PB 3 The molar mass fraction is 10%) completely dissolved in 0.2ml DMSO to obtain solution B;

[0059] (3) Add solution B to solution A and fully mix to obtain bromoformamidine modified perovskite precursor solution C;

[0060] (4) Take an appropriate amount of perovskite precursor solution C and fill it in a mesoscopic solar cell based on a carbon counter e...

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Abstract

The invention belongs to the technical field of photoelectric functional materials, and more specifically relates to a perovskite photoelectric functional material modified by organic small molecule halides, its preparation and application. Its chemical formula is (M) z (A1) a (A2) b (A3) 1‑a‑b‑z (B1) c (B2) 1‑c (X1) d (X2) e (X3) 3‑d‑e , where M is an organic small molecule halide, and the perovskite-based photoelectric functional material ABX is synthesized by using an organic halide small molecule 3 Modification is carried out to obtain perovskite-based photoelectric functional materials. The perovskite-based photoelectric functional materials modified by organic small molecule halides of the present invention can significantly improve the crystallinity and fill factor of perovskite, and can obtain excellent electrical properties. Perovskite photoelectric functional materials, and the preparation process is simple and low cost.

Description

technical field [0001] The invention belongs to the technical field of photoelectric functional materials, and more specifically relates to a perovskite photoelectric functional material modified by organic small molecule halides, its preparation and application. Background technique [0002] In recent years, solar power generation technology has developed rapidly, and the first generation of silicon solar cells has successfully achieved large-scale commercial production, making a great contribution to replacing traditional fossil energy. However, the preparation process of silicon cells is complicated and the preparation conditions are harsh. Therefore, finding cheap photoelectric materials with simple preparation methods is an urgent problem to be solved. [0003] As the third generation of solar cells, perovskite solar cells have attracted more and more attention due to their high photoelectric conversion efficiency, low cost and no pollution. Perovskite material ABX 3...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/05H01L51/42H01L51/50H01L51/30H01L51/46H01L51/54
CPCH10K85/00H10K10/00H10K30/10H10K50/00Y02E10/549
Inventor 韩宏伟吴佳汶胡玥荣耀光梅安意
Owner HUAZHONG UNIV OF SCI & TECH
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