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Chemical method for preparing CuBiI4 photoelectric thin film material through wet-process elementary substance powder room-temperature reaction

A chemical method and photoelectric thin film technology, applied in the field of material chemistry, can solve problems such as limited application and industrialized mass production, large film band gap, difficult to preserve, etc., and achieve broad industrial application prospects, simple device and operation, and easy preservation Effect

Active Publication Date: 2021-06-18
XUCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although they all synthesized CuBiI 4 , but the high temperature and high energy consumption in the preparation process, the raw material BiI 3 It is difficult to preserve in the external environment, the prepared film has a large band gap and the required complex experimental instruments and experimental conditions limit its application and industrial mass production

Method used

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  • Chemical method for preparing CuBiI4 photoelectric thin film material through wet-process elementary substance powder room-temperature reaction
  • Chemical method for preparing CuBiI4 photoelectric thin film material through wet-process elementary substance powder room-temperature reaction
  • Chemical method for preparing CuBiI4 photoelectric thin film material through wet-process elementary substance powder room-temperature reaction

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049]1. Preparatory work: Clean the ITO conductive glass with detergent and deionized water for 30 minutes, and then in ammonia water (25% by mass): hydrogen peroxide (30% by mass): ionized water with a volume ratio of 1:2: Cook in the mixed solution of 5 at 80°C for 30 minutes, and then use deionized water to sonicate for 30 minutes again. The treated ITO conductive glass is dried at 80°C, irradiated with ultraviolet light for half an hour, and stored in a clean desiccator for later use. use.

[0050] 2. Reaction steps: Weigh 0.0445g Cu powder, 0.1463g Bi powder (Cu:Bi molar ratio is 1:1), 0.3556g I 2 The pellets were placed in a 5mL amber glass vial with magnets. Stir for 20 hours to mix and react the three elemental substances, and then use a pipette to measure 900 μL of N,N dimethylformamide and 100 μL of glacial acetic acid and add them to the mixed powder to form a solution. Stirring was continued for 1 hour to fully react in solution.

[0051] 3. Post-treatment: Fil...

Embodiment 4

[0061] 1, preparatory work: as embodiment 1

[0062] 2. Reaction steps: Weigh 0.0178g Cu powder, 0.1463g Bi powder, 0.3023g I powder respectively 2 (Cu:Bi molar ratio is 0.4:1), put it into a 5mL brown glass sample bottle equipped with magnets, stir for 20 hours to mix and react the three elements, and then use a pipette to measure 850μL of N , N-dimethylformamide and 150 μL of glacial acetic acid were added to the mixed powder to form a solution. Stirring was continued for 1.5 hours to fully react in solution.

[0063] 3. Post-treatment: Filter the obtained solution with a polytetrafluoroethylene filter membrane, then spin-coat it on the treated ITO conductive glass, use the anti-solvent method to measure 240 μL of chlorobenzene with a pipette gun and spin-coat it on the film, and then Place it on a heating plate at 60-80°C and anneal for 5-10 minutes to get gray-black CuBiI 4 film. The XRD pattern of obtained sample sees Pic 4-1 , BiI was found from the XRD spectrum 3...

Embodiment 5

[0065] 1, preparatory work: as embodiment 1

[0066] 2. Reaction steps: Weigh 0.03558g Cu powder, 0.1463g Bi powder (Cu: Bi molar ratio is 0.8:1), 0.3378g I 2 Put them into a 5mL brown glass sample bottle with magnets, stir for 24 hours to mix and react the three elements, and then use a pipette gun to measure 850μL of N,N dimethylformamide and 150μL of glacial acetic acid Add to the mixed powder to form a solution. Stirring was continued for 2 hours to fully react in solution.

[0067] 3. Post-treatment: Filter the obtained solution with a polytetrafluoroethylene filter membrane, then spin-coat it on the treated ITO conductive glass, use the anti-solvent method to measure 240 μL of chlorobenzene with a pipette gun and spin-coat it on the film, and then Place it on a heating plate at 60-80°C and anneal for 5-10 minutes to get gray-black CuBiI 4 film. Figure 5-1 is the XRD pattern of the obtained sample, Figure 5-2 is its UV absorption curve, Figure 5-3 Transient surfa...

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Abstract

The invention belongs to the technical field of material chemistry, and relates to a chemical method for preparing an iodine bismuth copper photoelectric thin film material through wet-process elementary substance powder room-temperature reaction. The method comprises the following steps: putting copper powder, bismuth powder and elemental iodine in a closed container, stirring the mixture for a period of time at the room temperature of 20-40 DEG C, adding a solvent and glacial acetic acid, continuously stirring and reacting for a period of time to generate CuBiI4, spin-coating a substrate material with a reaction liquid, and performing annealing to obtain the CuBiI4 film. According to the method, metal and nonmetal elementary substance powder directly reacts at room temperature, and glacial acetic acid is added, so that the generation of BiOI is effectively inhibited, and the high-purity CuBiI4 film is obtained. The method has the advantages of no special requirements on reaction equipment, mild conditions, simple process and good repeatability, and can be used for unlimited large-scale industrial production.

Description

technical field [0001] The invention belongs to the technical field of material chemistry, and in particular relates to the preparation of CuBiI by a wet-process elemental powder room temperature reaction 4 Chemical approach to photovoltaic thin film materials. Background technique [0002] From 2009 to the present, the conversion efficiency of perovskite solar cells has increased from 3.81% to 23.2%. However, most of these high-efficiency solar cells are of the lead-based perovskite type. The harm to the human body and the environment is great, and the stability is poor, so its application in various aspects and social acceptance are affected. The research on lead-free perovskite materials is becoming more and more important. CuBiI 4 As a non-toxic lead-free perovskite material, it has attracted extensive attention. The first research on it was the Fourcroy research group, who put CuI and BiI in a sealed silica bottle at 610 °C 3 The mixed powder was reacted, and then ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18H01L31/0445
CPCH01L31/18H01L31/0445Y02P70/50Y02E10/50
Inventor 郑直屈南南雷岩胡晓静赵文才赵超亮
Owner XUCHANG UNIV
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