Perovskite material, application thereof on solar cell and preparation method of solar cell

A perovskite material, a technology for solar cells, applied in the field of solar cells, can solve problems such as low energy conversion efficiency, lead-based perovskite pollutes the environment, and affects human health, and achieves electron and hole mobility improvement and cost advantages. , the effect of increasing mechanical stress

Active Publication Date: 2018-06-19
SUZHOU UNIV
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Problems solved by technology

[0004] Technical problem to be solved: Aiming at the shortcomings of the existing lead-based perovskite that pollutes the environment, affects human health and has low energy conversion efficiency, the present invention provides a lead-tin-copper ternary perovskite solar cell and its preparation method

Method used

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  • Perovskite material, application thereof on solar cell and preparation method of solar cell
  • Perovskite material, application thereof on solar cell and preparation method of solar cell
  • Perovskite material, application thereof on solar cell and preparation method of solar cell

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Embodiment 1

[0031] A method for preparing a lead-tin-copper ternary high-efficiency perovskite solar cell, the preparation steps of the preparation method are as follows:

[0032] (1) Dissolve 190mg of methylammonium iodide, 510mg of lead iodide, 20mg of tin iodide and 13mg of copper bromide in a mixed solvent of γ-butyrolactone and dimethyl sulfoxide (volume ratio 7:3 ), stirred for 5h to make a perovskite solution with a concentration of 40wt%;

[0033] (2) Hydrolyzing titanium tetrachloride at a low temperature of 70°C to obtain a titanium dioxide electron transport layer with good charge transport properties, forming a cured cathode modification layer with a thickness of 45 nm;

[0034] (3) Spin-coat the perovskite γ-butyrolactone and dimethyl sulfoxide solution obtained in (1) on the cathode modification layer obtained in (2) at a speed of 4000 rpm for 40 seconds, and then Lower annealing for 10 minutes to obtain a uniformly cured photosensitive layer with a thickness of 250 nm;

...

Embodiment 2

[0038] A preparation method of a lead-copper perovskite solar cell, the preparation steps of the preparation method are as follows:

[0039] (1) Dissolve 190 mg of methyl ammonium iodide, 530 mg of lead iodide and 13 mg of copper bromide in a mixed solvent of γ-butyrolactone and dimethyl sulfoxide (volume ratio 7:3), and stir for 5 hours. Making concentration is the perovskite solution of 40wt%;

[0040] (2) Hydrolyzing titanium tetrachloride at a low temperature of 70°C to obtain a titanium dioxide electron transport layer with good charge transport properties, forming a cured cathode modification layer with a thickness of 45 nm;

[0041] (3) Spin-coat the perovskite γ-butyrolactone and dimethyl sulfoxide solution obtained in (1) on the cathode modification layer obtained in (2) at a speed of 4000 rpm for 40 seconds, and then Lower annealing for 10 minutes to obtain a uniformly cured photosensitive layer with a thickness of 300 nm;

[0042] (4) Spin-coat 2,2',7,7'-tetrakis[N,...

Embodiment 3

[0045] A method for preparing a lead-tin-copper ternary high-efficiency perovskite solar cell, the preparation steps of the preparation method are as follows:

[0046] (1) Dissolve 190mg of methylammonium iodide, 470mg of lead iodide, 33.5mg of tin iodide and 20mg of copper bromide in a mixed solvent of γ-butyrolactone and dimethyl sulfoxide (volume ratio 7: 3), stirring for 5 hours to make a perovskite solution with a concentration of 35wt%;

[0047] (2) Hydrolyzing titanium tetrachloride at a low temperature of 70°C to obtain a titanium dioxide electron transport layer with good charge transport properties, forming a cured cathode modification layer with a thickness of 20 nm;

[0048] (3) Spin-coat the perovskite γ-butyrolactone and dimethyl sulfoxide solution obtained in (1) on the cathode modification layer obtained in (2) at a speed of 3500 rpm for 60 seconds, and then Lower annealing for 15 minutes to obtain a uniformly cured photosensitive layer with a thickness of 320...

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Abstract

The invention provides a perovskite material, an application thereof on a solar cell and a preparation method of the solar cell. The preparation method comprises the steps of dissolving a precursor material of methyl ammonium iodide, lead iodide, tin iodide or copper bromide or a precursor material of methyl ammonium iodide, lead iodide and copper bromide into a mixed solvent of gamma-butyrolactone and dimethyl sulfoxide to prepare a perovskite solution; using TiO2 prepared at a low temperature to serve as a cathode transmission layer; processing the ternary lead-tin-copper perovskite solutionto the cathode transmission layer, and then processing 2,2',7,7'-tetra[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene to a junction light sensing layer to obtain a hole transport layer; and thendepositing an anode electrode so as to obtain an efficient and environment-friendly perovskite solar cell. The obtained perovskite solar cell is high in energy conversion efficiency, environment-friendly, simple in process and good in perovskite crystal characteristic.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a perovskite material and its application in solar cells and a preparation method for solar cells. Background technique [0002] Organometal halide perovskites are an attractive class of photovoltaic semiconductors because of their excellent optoelectronic properties, such as broadband absorption, long carrier diffusion length, and low-cost materials. Currently, perovskite solar cells already have an energy conversion efficiency of 22.1%. To date, most high-performance perovskite solar cells still rely on lead-based perovskites. However, severe contamination of soil and / or water by lead must be considered. Its potential health risks to humans and harm to ecosystems may reduce market acceptance of lead-containing batteries. Finding lead-free or low-toxicity metal halide perovskites that can exhibit lead-like properties is an effective way to address this challenge. Some low-toxicity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/46H01L51/42H01L51/48
CPCH10K85/60H10K30/151Y02E10/549
Inventor 廖良生王照奎李萌
Owner SUZHOU UNIV
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