Carbon electrode perovskite solar battery and preparation method thereof

Abstract

The invention discloses a carbon electrode perovskite solar battery and a preparation methodthereof. An electron transmission layer, a perovskite thin film, and(a hole transmission layer) are preparedon a transparent conducting substrate in sequence and then the transparent conducting substrate is coated with carbon pulp. Then air exhaust drying is performed on the carbon pulp and the stable andefficient carbon electrode perovskite solar battery is prepared. The corrosion time of perovskite corroded by a solvent in the carbon pulp is the drying time of the carbon pulp, so that the evaporation of the solvent in the carbon pulp is accelerated, the carbon pulp drying time is shortened, and corrosion on perovskite by the solvent in the carbon pulp can be reduced effectively. According to theinvention, aiming at different kinds of carbon pulps, a universal method is provided for solving the problem of corrosion on perovskite by the solvent in the carbon pulp, quick leaving of the solventvolatilized from the carbon pulp can be urged due to the differential pressure effect by utilizing an air exhaust method, so that the solvent can volatilize to a gas phase quickly further, the carbonpulp drying time is reduced substantially, and the corrosion on perovskite by the solvent is reduced. Therefore, a solid foundation is laid for preparing the stable and efficient carbon electrode solar battery.

Description

technical field

[0001] The invention relates to the fields of material science technology, thin film preparation technology and solar cell preparation technology, in particular to a carbon electrode perovskite solar cell and a preparation method thereof. Background technique

[0002] Since perovskite cells achieved an efficiency of 3.9% in 2009, this type of cell has aroused heated discussions and research. Currently the highest certified efficiency is 22.1%. However, conventional perovskite solar cells with HTM metal electrodes still have many problems. Due to the existence of HTM such as Spiro-MeOTAD, the battery stability is poor and expensive; noble metal electrodes, such as Ag, are expensive and will react with perovskite; noble metal Au electrodes are expensive and their preparation process also limits perovskite. Large-scale and low-cost continuous production of mining batteries. Carbon materials are ideal substitutes for noble metal electrodes due to their abundan...

Examples

Embodiment 1

[0056] 1. On the ITO substrate, spin-coat TiO 2 Precursor, sintered at 500 degrees for half an hour to prepare dense TiO 2 Electron transport layer;

[0057] 2. In dense TiO 2 A layer of perovskite precursor was spin-coated on the electron transport layer and dried to prepare MAPbI 3 perovskite thin film.

[0058] 3. On the dense perovskite film, use a scraper method to scrape a layer of commercial carbon slurry with a thickness of about 15 μm whose solvent is isophorone, then heat on the surface of the carbon slurry, cool the ITO side, and dry it under a pressure of 100Pa , to accelerate the volatilization of the solvent, that is, to obtain a carbon electrode perovskite solar cell.

[0059] Test and record the cross-sectional morphology of the carbon film, such as Figure 3-1 , Figure 3-2 As shown, the perovskite morphology remained intact and no corrosion occurred. Battery performance such as Figure 3-3 shown

Embodiment 2

[0061] 1. On the ITO substrate, spin-coat TiO 2 Precursor, sintered at 500 degrees for half an hour to prepare dense TiO 2 Electron transport layer;

[0062] 2. In dense TiO 2 A layer of perovskite precursor was spin-coated on the electron transport layer and dried to prepare FAPbI 3 perovskite thin film.

[0063] 3. On the hole transport layer, use a scraper method to scrape a layer of commercial carbon slurry with a thickness of about 20 μm whose solvent is butyl acetate, then heat on the surface of the carbon slurry, cool the ITO side, and dry it under a pressure of 100 Pa to make the solvent Accelerate volatilization to obtain carbon electrode perovskite solar cells.

Embodiment 3

[0065] 1. On the ITO substrate, spin-coat TiO 2 Precursor, sintered at 500 degrees for half an hour to prepare dense TiO 2 Electron transport layer;

[0066] 2. In dense TiO 2 A layer of perovskite precursor was spin-coated on the electron transport layer and dried to prepare FAPbI 3 Perovskite film, spin-coated with a layer of P3HT hole transport layer.

[0067] 3. On the hole transport layer, use a scraper method to scrape a layer of commercial carbon slurry with a thickness of about 20 μm as the solvent of butyl acetate, then heat the surface of the carbon slurry, cool the ITO side, and dry it under a pressure of 10 Pa to make the solvent Accelerate volatilization to obtain carbon electrode perovskite solar cells.

technical field

[0001] The invention relates to the fields of material science technology, thin film preparation technology and solar cell preparation technology, in particular to a carbon electrode perovskite solar cell and a preparation method thereof. Background technique

[0002] Since perovskite cells achieved an efficiency of 3.9% in 2009, this type of cell has aroused heated discussions and research. Currently the highest certified efficiency is 22.1%. However, conventional perovskite solar cells with HTM metal electrodes still have many problems. Due to the existence of HTM such as Spiro-MeOTAD, the battery stability is poor and expensive; noble metal electrodes, such as Ag, are expensive and will react with perovskite; noble metal Au electrodes are expensive and their preparation process also limits perovskite. Large-scale and low-cost continuous production of mining batteries. Carbon materials are ideal substitutes for noble metal electrodes due to their abundan...

Examples

Embodiment 1

[0056] 1. On the ITO substrate, spin-coat TiO 2 Precursor, sintered at 500 degrees for half an hour to prepare dense TiO 2 Electron transport layer;

[0057] 2. In dense TiO 2 A layer of perovskite precursor was spin-coated on the electron transport layer and dried to prepare MAPbI 3 perovskite thin film.

[0058] 3. On the dense perovskite film, use a scraper method to scrape a layer of commercial carbon slurry with a thickness of about 15 μm whose solvent is isophorone, then heat on the surface of the carbon slurry, cool the ITO side, and dry it under a pressure of 100Pa , to accelerate the volatilization of the solvent, that is, to obtain a carbon electrode perovskite solar cell.

[0059] Test and record the cross-sectional morphology of the carbon film, such as Figure 3-1 , Figure 3-2 As shown, the perovskite morphology remained intact and no corrosion occurred. Battery performance such as Figure 3-3 shown

Embodiment 2

[0061] 1. On the ITO substrate, spin-coat TiO 2 Precursor, sintered at 500 degrees for half an hour to prepare dense TiO 2 Electron transport layer;

[0062] 2. In dense TiO 2 A layer of perovskite precursor was spin-coated on the electron transport layer and dried to prepare FAPbI 3 perovskite thin film.

[0063] 3. On the hole transport layer, use a scraper method to scrape a layer of commercial carbon slurry with a thickness of about 20 μm whose solvent is butyl acetate, then heat on the surface of the carbon slurry, cool the ITO side, and dry it under a pressure of 100 Pa to make the solvent Accelerate volatilization to obtain carbon electrode perovskite solar cells.

Embodiment 3

[0065] 1. On the ITO substrate, spin-coat TiO 2 Precursor, sintered at 500 degrees for half an hour to prepare dense TiO 2 Electron transport layer;

[0066] 2. In dense TiO 2 A layer of perovskite precursor was spin-coated on the electron transport layer and dried to prepare FAPbI 3 Perovskite film, spin-coated with a layer of P3HT hole transport layer.

[0067] 3. On the hole transport layer, use a scraper method to scrape a layer of commercial carbon slurry with a thickness of about 20 μm as the solvent of butyl acetate, then heat the surface of the carbon slurry, cool the ITO side, and dry it under a pressure of 10 Pa to make the solvent Accelerate volatilization to obtain carbon electrode perovskite solar cells.

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