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Method for preparing pure-phase high-index vertically-oriented tin-based perovskite thin film based on phenylethyl amine chloride

A phenylethylammonium chloride and vertical orientation technology, applied in the field of solar cells, can solve the problems that the device stability and energy conversion efficiency cannot reach the ideal state at the same time, the decomposition of tin-based perovskite crystals, and the impact on energy conversion efficiency, etc. , to achieve the effect of facilitating energy supply, good water and oxygen isolation effect, and improving energy conversion efficiency

Active Publication Date: 2020-05-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: Conventional tin-based perovskite crystals are easily oxidized in the air, resulting in the decomposition of tin-based perovskite crystals and ultimately affecting their energy conversion efficiency. The introduction of two-dimensional perovskite can effectively solve the problem of crystal However, a large number of low-index and high-index mixed-phase two-dimensional tin-based perovskites block the coherence between three-dimensional perovskite lattices, and the energy conversion efficiency will be greatly affected.
Therefore, the current device stability and energy conversion efficiency cannot reach the ideal state at the same time.

Method used

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  • Method for preparing pure-phase high-index vertically-oriented tin-based perovskite thin film based on phenylethyl amine chloride
  • Method for preparing pure-phase high-index vertically-oriented tin-based perovskite thin film based on phenylethyl amine chloride
  • Method for preparing pure-phase high-index vertically-oriented tin-based perovskite thin film based on phenylethyl amine chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Provide a transparent conductive substrate of fluorine-doped tin oxide (FTO), and perform standardized cleaning;

[0030] (2) Methyl iodide (FAI), stannous iodide (SnI 2 ) and stannous fluoride (SnF 2 ) was dissolved in dimethyl sulfoxide solution at a molar ratio of 1:1:0.1, phenethylamine chloride (PEACl) with a molar mass of 10 mol% was added, and stirred for 2-5 hours to obtain a tin-based perovskite precursor body solution;

[0031] (3) Treat the FTO with ozone for 30 min, then add nickel oxide (NiO x ) solution, rotated at 4000 rpm for 40 s, then annealed at 180 °C for 20 min to obtain a cured hole transport layer;

[0032] (4) After the perovskite precursor solution added with PEACl was treated with the anti-solvent of chlorobenzene, the perovskite layer film was rotated at a speed of 5000rpm for 70 seconds, anti-solvent treatment was performed for 50 seconds, and then the temperature gradient annealing treatment was performed, from 60 From ℃ to 100℃, fiv...

Embodiment 2

[0037] (1) Provide a transparent conductive substrate of fluorine-doped tin oxide (FTO), and perform standardized cleaning;

[0038] (2) Methyl iodide (FAI), stannous iodide (SnI 2 ) and stannous fluoride (SnF 2 ) was dissolved in dimethyl sulfoxide solution at a molar ratio of 0.9:1:0.1, and phenylethylammonium chloride (PEACl) with a molar mass of 10 mol% was added, and stirred for 2-5 hours to obtain a tin-based perovskite precursor body solution;

[0039] (3) Treat the FTO with ozone for 30 min, then add nickel oxide (NiO x ) solution, rotated at 4000 rpm for 40 s, then annealed at 180 °C for 20 min to obtain a cured hole transport layer;

[0040] (4) After the perovskite precursor solution added with PEACl was treated with the anti-solvent of chlorobenzene, the perovskite film was rotated at 5000rpm for 70 seconds, anti-solvent treatment was performed for 50 seconds, and then gradient annealing was performed. The temperature was raised to 100 °C, and five temperature ...

Embodiment 3

[0045] (1) Provide a transparent conductive substrate of fluorine-doped tin oxide (FTO), and perform standardized cleaning;

[0046] (2) Methyl iodide (FAI), stannous iodide (SnI 2 ) and stannous fluoride (SnF 2 ) was dissolved in dimethyl sulfoxide solution at a molar ratio of 1:1:0.1, phenethylamine chloride (PEACl) with a molar mass of 10 mol% was added, and stirred for 2-5 hours to obtain a tin-based perovskite precursor body solution;

[0047] (3) Treat FTO with ozone for 30 min, then add poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonic acid) solution dropwise, rotate at 4000 rpm for 40 s, then anneal at 180 °C, Annealed for 20 min to obtain a cured hole transport layer;

[0048] (4) After the perovskite precursor solution added with PEACl was treated with the anti-solvent of chlorobenzene, the perovskite film was rotated at 5000rpm for 70 seconds, anti-solvent treatment was performed for 50 seconds, and then gradient annealing was performed. The temperature was ...

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Abstract

The invention belongs to the field of solar cells, and discloses a method for preparing a pure-phase high-index vertically-oriented tin-based perovskite film based on phenylethyl amine chloride. The method is characterized in that by introducing a certain amount of phenethyl amine chloride into a tin-based perovskite precursor solution, high-index and low-index orientation growth is controlled ina two-dimensional structure at different specific temperatures; and through recrystallization induction of phenylethyl amine chloride on tin-based perovskite crystal crystallization and gradient annealing treatment, growth of a low-index structure is effectively inhibited, and the full-coverage and pure-phase high-index two-dimensional crystal tin-based perovskite film growing perpendicular to a substrate is realized. The indoor energy conversion efficiency and the outdoor energy conversion efficiency of the finally prepared photovoltaic device are obviously improved, the tin-based crystal atthe grain boundary achieves a good water-oxygen isolation effect, and the stability of the tin-based device is improved. The method is beneficial to preparation of an efficient and stable tin-based perovskite indoor photovoltaic device, and facilitates energy supply of an intelligent home terminal in the era of internet of things.

Description

technical field [0001] The invention belongs to the field of solar cells, and relates to a novel method for preparing and forming a film of an environmentally friendly tin-based perovskite crystal, in particular to a kind of phenethyl ammonium chloride participating in the crystallization phase transition of a tin-based perovskite crystal thin film Process and induce the preparation process of highly vertical orientation growth of tin-based perovskite thin films with pure phase and high index two-dimensional structure. Background technique [0002] Solar photovoltaic devices convert solar energy into electrical energy, which solves an important energy problem in the development of human society, and has also received extensive attention. Among them, perovskite solar cells have been developed rapidly due to their low cost and outstanding optical and electrical properties, and the energy conversion efficiency of the prepared perovskite solar cells can reach 25.2%. Currently, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/00H01L51/42C30B29/54H10K99/00
CPCC30B29/54H10K71/12H10K71/40H10K30/15H10K30/00Y02E10/549Y02B10/10
Inventor 王照奎李萌
Owner SUZHOU UNIV
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