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Preparation method of perovskite solar cell based on ionic liquid additives

A technology of solar cells and perovskite, applied in the field of preparation of perovskite solar cells, can solve the problems of unfavorable production environment safety, affecting the quality of perovskite film formation, unfavorable mass production, etc., to improve the film coverage. , improve repeatability, low cost effect

Inactive Publication Date: 2018-08-17
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are many disadvantages in the use of anti-solvent, such as: the addition time, method, dosage and even dropping position of anti-solvent directly affect the quality of perovskite film formation, which is difficult to control accurately and has poor repeatability; commonly used more efficient anti-solvent , such as chlorobenzene, toluene, etc. are toxic, which is not conducive to the safety of the production environment; the use of anti-solvents, the process is cumbersome, not conducive to continuous mass production, especially when preparing large-area perovskite solar cells, its disadvantages are more obvious

Method used

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  • Preparation method of perovskite solar cell based on ionic liquid additives
  • Preparation method of perovskite solar cell based on ionic liquid additives
  • Preparation method of perovskite solar cell based on ionic liquid additives

Examples

Experimental program
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Effect test

Embodiment 1

[0029] see figure 1 , spin-coated tin dioxide (SnO 2 2 ) nano solution, and annealed at 200°C for 30 minutes to prepare electron transport layer 4;

[0030] Prepare CH 3 NH 3 I and PbI 2 mixed solution of PbI 2 The concentration is 1.2 mol / L (the solvent is dimethylformamide, CH 3 NH 3 I and PbI 2 The molar ratio is 1:1), add 10wt% methylamine acetate, drop the above mixed solution on the electron transport layer 4, immediately roll coat at a constant speed (1-100 mm / s) and blow dry with nitrogen flow, at 100- Annealing at 200°C for 10 minutes to prepare the perovskite absorber layer 3;

[0031] Then spin-coat Spiro-OMeTAD (2,2',7,7'-tetrakis[N,N-bis(4-methoxyphenyl)amino]-9,9'-spirobifluorene) solution to prepare empty Cave transport layer 2;

[0032] Finally, the gold counter electrode is vapor-deposited to obtain an n-i-p type perovskite solar cell. The preparation method of the top electrode 1 and the bottom electrode 6 can adopt thermal evaporation method.

Embodiment 2

[0034] see figure 2 , Spin-coat PEDOT:PSS solution on fluorine-doped tin oxide (FTO) or tin-doped indium oxide (ITO) glass substrate (transparent conductive substrate 5) after cleaning and UV ozone treatment, at 100-200 °C Lower annealing for 15 minutes to prepare the hole transport layer 2;

[0035] Prepare CH 3 NH 3 I and PbI 2 mixed solution of PbI 2 The concentration is 1.2 mol / L (the solvent is dimethylformamide and dimethyl sulfoxide, the volume ratio is 20:1, CH 3 NH 3 I and PbI 2The molar ratio is 1:1), add the ionic liquid additive MY (MY is methylamine formate) of 10wt% of the total weight of the solution, drop the above mixed solution on the hole transport layer, and immediately roll coat at a uniform speed (1-100 mm / seconds) and blown dry with nitrogen flow, and annealed at 50°C for 20 minutes to obtain perovskite absorber layer 3;

[0036] Then spin-coat polystyrene sulfonate (such as PSSA) solution to prepare electron transport layer 4;

[0037] Finall...

Embodiment 3

[0039] Roll coating of titanium dioxide (TiO 2 ) nano solution, blown dry with nitrogen flow, and annealed at 200° C. for 30 minutes to prepare electron transport layer 4;

[0040] Prepare CH 3 NH 3 I and PbCl 2 mixed solution of PbCl 2 The concentration is 0.3 mol / L (the solvent is dimethylformamide (DMF), dimethyl sulfoxide (DMSO) and γ-butyrolactone, the volume ratio is 10:1:1, CH 3 NH 3 I and PbCl 2 The molar ratio is 3:1), add 0.1wt% ionic liquid additive MY (M is propylmethylamine salt cation, Y is formate ion) of the total weight of the solution, and directly drop-coat the above mixed solution on the electron transport layer 4 , and dried with nitrogen flow, and annealed at 100° C. for 15 minutes to obtain perovskite absorber layer 3;

[0041] Then spin-coat poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine] (PTAA) solution to prepare hole transport layer 2;

[0042] Finally, a top electrode and a bottom electrode are prepared, and the top electrode 1 and the botto...

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Abstract

The invention discloses a preparation method of a perovskite solar cell based on ionic liquid additives. The perovskite solar cell based on the ionic liquid additives includes a top electrode, a holetransport layer, a perovskite absorbing layer, an electron transport layer, a transparent conductive substrate and a bottom electrode, the hole transport layer, the perovskite absorbing layer and theelectron transport layer are arranged between the top electrode and the transparent conductive substrate from top to bottom, or the electron transport layer, the perovskite absorbing layer and the hole transport layer are arranged between the top electrode and the transparent conductive substrate from top to bottom, and the transparent conductive substrate is also provided with the bottom electrode. The preparation method is advantageous in that the operation is simple and easy, the cost is low, the toxicity hazard of the preparation process is small, the crystallization is controllable, the film quality is high, and a new thought is provided for high-efficiency and large-area preparation of the perovskite cells.

Description

technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a method for preparing perovskite solar cells based on ionic liquid additives. Background technique [0002] In recent years, perovskite solar cells have become the fastest-growing solar cells. Among them, the method of preparing perovskite cells by solution method is relatively simple and widely used. [0003] In the process of preparing perovskite batteries by solution method, the distribution and number of nucleation sites of perovskite materials are regulated by solvent volatilization speed. In order to achieve its rapid crystallization, after spin coating a layer of perovskite precursor wet film, often drop Anti-solvent is used to accelerate solvent volatilization, affect the quality of perovskite film and device performance, and then promote the rapid crystallization of perovskite to prepare dense, large-grained perovskite film and high-efficiency solar cells...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/42
CPCH10K71/13H10K71/12H10K30/00Y02E10/549
Inventor 李跃龙辛晨光张晓丹赵颖
Owner NANKAI UNIV
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