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Perovskite thin film battery preparation method

A thin film battery and perovskite technology, applied in the field of solar cells, can solve the problems of thin film corrosion, low repeatability, poor coating quality, etc., and achieve the effects of low preparation process cost, avoiding thin film roughness, and improving efficiency

Active Publication Date: 2017-09-19
陕西凌峰致新能源科技有限公司
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Problems solved by technology

[0005] However, so far, there are still several problems in the preparation of perovskite batteries by the one-step coating method of acetate solution: 1) The current acetate solution method basically uses dimethylformamide as a solvent, which is easy to A clear solution is obtained, but the solution prepared with dimethylformamide as a solvent has the disadvantages of poor coating quality and low repeatability during the coating process. The reason is that dimethylformamide has a corrosive effect on the film and evaporates The dimethylformamide vapor in the film corrodes the film during the coating process, making it difficult to control the quality of the film; 2) The efficiency of the perovskite battery prepared by the acetate solution method is low, and it is difficult to exceed 13%, which has not yet reached the level of iodized salt. The efficiency of the cell obtained by the method

Method used

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preparation example Construction

[0033] A preparation method for a perovskite thin film battery, comprising the following steps:

[0034] Step 1: Preparation of precursor solution:

[0035] (1-1) Dissolve lead acetate and methyl ammonium iodide in ethylene glycol methyl ether, the molar ratio of lead acetate to methyl ammonium iodide is 1~1.1:3, adjust the amount of ethylene glycol methyl ether, so that The lead ion concentration is controlled at 0.7-0.8mol / L, and a clear solution A is obtained after stirring;

[0036] (1-2), add acetylacetone to solution A, the molar ratio of lead acetate to acetylacetone is 1~1.1:1~1.1, and obtain solution B after stirring;

[0037] (1-3) Dissolve fullerene derivative PCBM powder in anhydrous chlorobenzene solution, and control the mass ratio of PCBM to 20-22 mg / ml by adjusting the content of chlorobenzene solution to obtain solution C;

[0038] Step 2: Preparation of thin film battery:

[0039] (2-1) Use commercial poly(3,4-dioxyethylthiophene) solution to perform spin-...

Embodiment 1

[0048] Step 1: Preparation of Precursor Solution

[0049] Lead acetate, ammonium iodide are dissolved in ethylene glycol methyl ether solution, control lead acetate, the molar ratio of ammonium iodide is 1.07: 3, obtain clear solution A after stirring, by regulating the consumption of ethylene glycol methyl ether , so that the concentration of lead ions is controlled at 0.7mol / L;

[0050] Add acetylacetone in solution A, so that the moles of lead acetate and acetylacetone must be: lead acetate: acetylacetone=1:1, obtain clear solution B after stirring;

[0051] Dissolving fullerene derivative PCBM powder in anhydrous chlorobenzene solution, controlling the mass ratio of PCBM to 22 mg / ml by adjusting the content of chlorobenzene solution, to obtain solution C;

[0052] Step 2: Preparation of Thin Film Battery

[0053] Commercial poly(3,4-dioxyethylthiophene) solution (referred to as PEDOT solution) was used to spin-coat the glass coated with ITO conductive film. The spin-coat...

Embodiment 2

[0056] Lead acetate, methyl ammonium iodide are dissolved in ethylene glycol methyl ether solution, control lead acetate, the molar ratio of methyl iodide ammonium is 1: 3, obtain clear solution A after stirring, by regulating the consumption of ethylene glycol methyl ether , so that the lead ion concentration is controlled at 0.7mol / L; Add acetylacetone in solution A, so that the moles of lead acetate and acetylacetone must be: lead acetate: acetylacetone=1:1, after stirring, obtain clear solution B; fullerene Derivative PCBM powder was dissolved in anhydrous chlorobenzene solution, and the mass ratio of PCBM was controlled to be 22 mg / ml by adjusting the content of chlorobenzene solution to obtain solution C.

[0057] Commercial poly(3,4-dioxyethylthiophene) solution (referred to as PEDOT solution) was used to spin-coat the glass coated with ITO conductive film. The spin-coating speed was controlled at 3000 rpm, and the spin-coating time was Controlled at 50s, the resulting ...

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Abstract

The invention relates to a perovskite thin film battery preparation method. The method includes solving lead acetate, acetylacetone, and methylammonium iodide in a 2-Methoxyethanol solution in a mole ratio of (1-1.1):(1-1.1):3 to obtain a precursor solution with the lead ion concentration of 0.7-0.8 mol / L, performing spin coating of the solution for 150-180s on the glass / ITO / PEDOT to obtain a gel film, obtaining a perovskite layer by performing sun light irradiation and annealing at the low temperature of 70 DEG C, and further preparing a PCBM layer and an Al electrode to obtain a perovskite solar cell having a structure of glass / ITO / PEDOT / perovskite layer / PCBM / Al and having the efficiency improved by 15%. Based on the acetate one-step solution film plating method, and through the combination with the photochemical and long-term spin coating technology, the preparation method has the advantages of high technological repeatability and high battery efficiency.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a method for preparing a perovskite thin film cell. Background technique [0002] With the gradual depletion of primary energy and the increasingly serious environmental pollution, the development of various clean and renewable energy sources (such as solar energy, wind energy, nuclear energy, water energy, geothermal tides, etc.) is an urgent task facing mankind. Solar energy has the advantages of being inexhaustible and inexhaustible, and the research and development of solar cells has attracted widespread attention. Among all kinds of photovoltaic cells, traditional crystalline silicon solar cells occupy 85% of the photovoltaic market due to their mature technology and stable efficiency. However, due to the high cost of raw materials and processes, the cost of batteries remains high. All kinds of thin-film solar cells (such as a-Si, CIGS, CdTe, etc.) have limited their commercializ...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/48
CPCH10K71/12H10K71/421H10K30/15Y02E10/549
Inventor 黄文欢马养民刘潼杨雨豪康祎璠张亚男
Owner 陕西凌峰致新能源科技有限公司
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