Preparation method and application of titanium tetrafluoride passivated perovskite battery interface

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

Active Publication Date: 2020-02-28
EAST CHINA UNIV OF SCI & TECH
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However, the research on multival...

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  • Preparation method and application of titanium tetrafluoride passivated perovskite battery interface
  • Preparation method and application of titanium tetrafluoride passivated perovskite battery interface
  • Preparation method and application of titanium tetrafluoride passivated 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 an application of a titanium tetrafluoride passivated perovskite battery interface. The preparation method comprises the following steps: dissolving 2-8mg of titanium tetrafluoride powder into 1mL of N, N-dimethylformamide solution; taking and diluting 2-20[mu]L of titanium tetrafluoride-N, N-dimethylformamide solution, adding less than 20[mu]L ofthe diluted N, N-dimethylformamide solution into 100[mu]L of an FACs-based perovskite precursor solution with a concentration of 0.8-1.2 mol/mL; and shaking the solution to a uniform state, spin-coating conductive glass FTO covered by titanium dioxide with the solution to form a film, carrying out annealing and cooling, applying a hole layer by spin-coating, vapor-depositing conductive electrode silver, and assembling a complete perovskite solar cell. Fluorine and titanium ions of titanium tetrafluoride in the perovskite solution are spontaneously dispersed on the upper interface and the lowerinterface of the perovskite absorption layer film, so that corresponding defects at the interface of the battery film can be passivated, the performance of an original battery is improved by about 12.6%, and the stability is obviously 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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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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