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A preparation method and application of titanium tetrafluoride passivation perovskite battery interface

A technology of perovskite cells and titanium tetrafluoride, which is applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of less research on multivalent metal ions, and achieve good repeatability, efficiency and stability improvement, and operation. easy effect

Active Publication Date: 2021-10-12
EAST CHINA UNIV OF SCI & TECH
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Problems solved by technology

However, the research on multivalent metal ions based on fluoride is less

Method used

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  • A preparation method and application of titanium tetrafluoride passivation perovskite battery interface
  • A preparation method and application of titanium tetrafluoride passivation perovskite battery interface
  • A preparation method and application of titanium tetrafluoride passivation perovskite battery interface

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Embodiment 1

[0024] Step 1. Preparation of titanium tetrafluoride doped perovskite thin film

[0025] First weigh 484.1mg of lead iodide, 146.8mg of lead bromide, 202.2mg of formamidine iodine and 62.7mg of iodide powder dissolved in 1mL of N,N-dimethylformamide and dimethyl sulfoxide (volume ratio of 4 : 1) form concentration 1mol / mL in the solvent. Then heated and stirred at 120° C. for 1 hour to form a perovskite precursor solution. Take 0-20 μL of 0.4 mg / mL titanium tetrafluoride N,N-dimethylformamide solution and add it to 100 μL perovskite precursor solution, mix evenly, spin-coat on the FTO glass covered with titanium dioxide, and then 120 μL ℃ for 10 minutes, 100 ℃ for 40 minutes.

[0026] figure 1 For the SEM of the as-prepared thin film, it can be seen that TiF4 doping forms a dense thin film.

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Abstract

The invention relates to a preparation method and application of titanium tetrafluoride passivation perovskite cell interface. Including dissolving 2-8mg titanium tetrafluoride powder in 1mL N,N-dimethylformamide solution, and then taking 2-20μL titanium tetrafluoride-N,N-dimethylformamide solution after dilution Take less than 20 μL of the solution and add it to 100 μL of the FACs-based perovskite precursor solution with a concentration of 0.8-1.2 mol / mL, shake well, spin-coat on the conductive glass FTO covered with titanium dioxide to form a film, spin-coat the hole layer after annealing and cooling , evaporate conductive electrode silver, and assemble into a complete perovskite solar cell. The invention uses the fluorine and titanium ions of titanium tetrafluoride in the perovskite solution to spontaneously disperse on the upper and lower interfaces of the perovskite absorbing layer film, which can effectively passivate the corresponding defects at the interface of the battery film, so that the performance of the original battery is improved by about 12.6%. , and the stability is significantly improved.

Description

technical field [0001] The invention relates to a method for preparing an organic-inorganic hybrid perovskite film which has passivation film defects and improves photoelectric conversion efficiency and moisture stability. The method has important applications in the preparation and application fields of new solar cells. Background technique [0002] Energy is the most important support point for the development of human society. With the rapid development of society, the depletion of non-renewable resources (oil, minerals, natural gas, etc.) and the ensuing environmental problems (climate warming, smog, etc.) force human beings to The search for new clean energy, and the effective use of clean energy such as solar energy, nuclear energy, wind energy, and water energy have drawn more and more attention from countries all over the world. As the most easily available renewable energy, solar energy is inexhaustible, inexhaustible, safe and environmentally friendly compared wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/48
CPCH10K71/12H10K30/151H10K30/88Y02E10/549
Inventor 杨化桂何敬敬侯宇杨双
Owner EAST CHINA UNIV OF SCI & TECH
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