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High-quality inorganic perovskite film, preparation method thereof and application of high-quality inorganic perovskite film to solar cells

A technology for solar cells and inorganic calcium, applied in the field of solar cells, can solve the problems of affecting the photoelectric conversion performance of the thickness of the inorganic perovskite thin film, unable to prepare a precursor solution, unable to prepare a thin film, etc., so as to improve the short-circuit current density and the preparation steps are simple. , the effect of improving solubility

Active Publication Date: 2017-09-26
INST OF CHEM CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the simple one-step method using DMF as solvent cannot prepare uniform CsPbI 2 Br film, and because of the limited solubility of CsBr in DMF, it is impossible to prepare a higher concentration precursor solution
Then affect the thickness of inorganic perovskite film and its related photoelectric conversion performance

Method used

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  • High-quality inorganic perovskite film, preparation method thereof and application of high-quality inorganic perovskite film to solar cells
  • High-quality inorganic perovskite film, preparation method thereof and application of high-quality inorganic perovskite film to solar cells
  • High-quality inorganic perovskite film, preparation method thereof and application of high-quality inorganic perovskite film to solar cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Preparation of High Quality Inorganic Perovskite Thin Films

[0069] Choose PbI 2 and CsBr are inorganic perovskite material precursor raw materials, according to 0.67mmol PbI 2 and 0.67 mmol CsBr were dissolved in 1 ml of a mixed solvent of DMF and DMSO, wherein the volume ratio of DMF and DMSO was 9:1, stirred for 2 h, and a solution with a concentration of 0.67 mol / L of the inorganic perovskite precursor solution was prepared.

[0070] The above solution was uniformly coated on the FTO glass substrate, and spin-coated at a speed of 1500rpm for 30s to obtain a colorless and transparent film.

[0071] Transfer the above film to a hot stage at 70°C for 3 minutes for annealing, the film turns yellowish brown, then transfer to a hot stage at 290°C for annealing for 10 minutes, remove and cool to prepare a high-quality inorganic perovskite film.

[0072]The thickness of the high-quality inorganic perovskite film prepared in this embodiment is 400nm-450nm.

[0073] figu...

Embodiment 2

[0078] Preparation and performance testing of solar cell devices with high-quality perovskite thin films

[0079] Using spray pyrolysis technology, the volume ratio of spray pyrolysis is 1:1 on the clean commercial transparent conductive substrate FTO (the thickness of the coating is about 450nm~500nm, the sheet resistance of the substrate is about 14Ω / □, and the light transmittance is 90%). Mixed precursor solution of titanium isopropoxybisacetylacetonate and ethanol. Then sintered at 500°C for 60 minutes to form TiO 2 dense layer.

[0080] According to the method described in Example 1, a high-quality perovskite film was prepared on the above substrate as an absorbing layer.

[0081] A hole transport layer P3HT was prepared on the perovskite thin film (absorber layer) using a spin coating method.

[0082] A gold layer with a thickness of 80 nm was prepared as the top electrode of the device by vacuum thermal evaporation method.

[0083] A 450W Model 91150 instrument from...

Embodiment 3

[0086] Preparation of High Quality Inorganic Perovskite Thin Films

[0087] The preparation method is the same as in Example 1, except that the volume ratio of DMSO and DMF in the mixed solvent of DMSO and DMF is 1:3.

[0088] Preparation and performance testing of high-quality perovskite thin film solar cell devices.

[0089] The preparation method is the same as in Example 2.

[0090] The photoelectric conversion efficiency of the solar cell of the perovskite thin film prepared in this example is 6.86%.

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Abstract

The invention discloses a high-quality inorganic perovskite film, a preparation method thereof and an application of the high-quality inorganic perovskite film as an absorbing layer to solar cells. A good solvent of an inorganic perovskite precursor and a mixed solvent of an organic solvent with volatility slower than that of the good solvent and capacity of increasing solubility of the precursor are introduced in the preparation process of the high-quality inorganic perovskite film; the uniform, dense and continuous inorganic perovskite film can be obtained by adjusting a ratio of the two solvents according to the characteristics that the mixed solvent is slower to volatilize and can increase the solubility of the precursor, the concentration of an inorganic perovskite material precursor solution can be remarkably increased by the mixed solvent, and the short-circuit current density of the inorganic perovskite solar cells prepared from the inorganic perovskite film is increased. The preparation method has the advantages of adopting mild preparation conditions and simple preparation steps, being convenient to operate, low in cost, low in energy consumption and the like, and the preparation method is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of solar cells, and in particular relates to a high-quality inorganic perovskite thin film, a preparation method thereof, and an application as an absorbing layer in thin-film solar cells. Background technique [0002] With the rapid development of industrialization in contemporary society, the increasingly serious energy and environmental problems have accelerated the development and utilization of new energy technologies. Solar energy has attracted widespread attention due to its abundant resource reserves, clean and environmental protection, and as a photoelectric conversion device. Solar cells have become the focus of research. In recent years, the performance of perovskite solar cells has improved rapidly, becoming the most promising third-generation solar cells to replace silicon solar cells and copper indium gallium selenide solar cells. Since Miyasaka and his colleagues reported organic-inorganic hybrid perov...

Claims

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Application Information

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IPC IPC(8): H01L31/0216H01L31/0264
CPCH01L31/02167H01L31/0264Y02E10/50
Inventor 胡劲松刘杰葛倩庆
Owner INST OF CHEM CHINESE ACAD OF SCI
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