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A method for synthesis of organic iodides, a perovskite-forming composition comprising an organic iodide and a photovoltaic cell with a perovskite layer obtained therefrom

A technology of hydrogen iodide and organic cations, applied in the preparation of lead organic compounds, organic compound/hydride/coordination complex catalysts, organic compounds, etc., can solve the problem of crystallization reaction rate reduction

Pending Publication Date: 2022-02-25
索尔股份公司
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Problems solved by technology

Said contamination results in a substantial decrease in the rate of the crystallization reaction, that is, due to the mesophase Pb(H 2 PO 2 ) 2 Formation from being MAH 2 PO 2 Contaminated MAI and PbI 2 (lead iodide) synthesis of perovskite leads to the formation of highly uniform and smooth perovskite layers with large grains

Method used

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  • A method for synthesis of organic iodides, a perovskite-forming composition comprising an organic iodide and a photovoltaic cell with a perovskite layer obtained therefrom
  • A method for synthesis of organic iodides, a perovskite-forming composition comprising an organic iodide and a photovoltaic cell with a perovskite layer obtained therefrom
  • A method for synthesis of organic iodides, a perovskite-forming composition comprising an organic iodide and a photovoltaic cell with a perovskite layer obtained therefrom

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preparation example Construction

[0065] The developed preparation R x The process of NI compounds ensures improved purity of the resulting products, which in turn enables them to be used as perovskite precursors in various perovskite-forming compositions, including colloidal solutions, such as inks, for the production of Morphology and quality of perovskite crystals in perovskite coatings.

[0066] The developed iodide synthesis method differs from prior art methods in that the method according to the present disclosure involves The step of obtaining hydrogen iodide (HI) in situ in the reaction medium . In other words, according to the developed method, hydrogen iodide (HI) was not used as a direct substrate for the synthesis of the respective iodides. Instead, the developed method includes the step of supplying substrates suitable for in situ hydrogen iodide (HI) synthesis into the reaction medium.

[0067] The developed method allows to obtain as having the molecular formula R x Various compounds of th...

Embodiment I

[0117] Example 1 - Synthesis of methylammonium iodide (MAI) using MAI as catalyst:

[0118] In a round bottom flask, dissolve a portion of the MAI catalyst in ethanol for each I 2 Iodine was added to MAI in an amount of 0.01 molar to obtain a bright translucent solution. Then, the whole dark brown I 2 Iodine was added to the resulting solution in one step to obtain a brown, opaque solution, which confirmed the presence of iodine (I 2 ). After 5 minutes, it dissolved, indicating that I was formed in solution 3 - (otherwise I 2 Molecular iodine will dissolve at a much slower rate). Formic acid is then added in a single step relative to I 2 Iodine was added to the resulting mixture in a molar ratio of 0.97:1.0, macroscopically, no change was observed in the flask. A suitable organic cation donor, methylamine, is then added to the solution. Methylamine was slowly added dropwise to the solution so that every mole of I added to the solution 2 Iodine has a total of 2.6 mo...

Embodiment II

[0120] Example II - Synthesis of catalyst-free octyl ammonium iodide (OAI):

[0121] Part of the iodine (I 2 ) was dissolved in ethanol in a round bottom flask in a single step to obtain a non-translucent dark brown solution demonstrating that molecular iodine (I 2 )The presence. After 15 minutes, iodine dissolved in ethanol and the solution remained dark brown and opaque. Then with 0.97:1.0 HCOOH:I 2 Molar ratios of formic acid were added to the flask and no change was observed in the flask. Then 2.6 moles of octylamine / per mole of I 2Iodine was slowly added dropwise to the solution. After addition of each drop of octylamine, bubbles and foam appeared in the reaction solution and an increase in temperature of the reaction mixture was observed due to its exothermic process. Bubbles and foam indicate the reaction of octylamine with in situ generated hydrogen iodide HI. After all the octylamine had been added (the reaction mixture remained brown), the flask was heated f...

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Abstract

A method for obtaining a salt with a general formula: RxNI, wherein: RxN is an organic cation (RxN+), R represents substituents (R-) independently selected from a group consisting of organic substituents: R1-, R2-, R3- and hydrogen (H-), x is a number of the substituents R- directly linked with the nitrogen (N) atom in the organic cation RxN+, wherein x is 3 or 4, I is an iodide anion (I-). The method comprises: preparing a reaction mixture comprising the steps of: synthesizing hydrogen iodide (HI) in situ by mixing molecular iodine (l2) with formic acid (COOH) in a molar ratio of molecular iodine (l2) : formic acid (COOH) of no less than 1.01:1, in a solvent medium, introducing into the solvent medium a compound being a donor of organic cation RxN+ in an amount providing the molar ratio of the donor of organic cation RxN+ : molecular iodine (l2) of no less than 1.01:1, and maintaining the reaction mixture at a temperature of not less than 20 DEG C for the time necessary to obtain the reaction product being the salt with the general formula RxNI. The obtained product is a substrate for synthesis of perovskites.

Description

technical field [0001] The present invention relates to a kind of obtaining having general formula (R x Process for the salts of NI), i.e. organic iodides, characterized by the high purity of the resulting product, relates to perovskite-forming compositions suitable for obtaining perovskite photosensitive coatings and comprising at least one iodide obtained using the process , also relates to a photovoltaic cell having a perovskite photosensitive layer formed using the composition. Background technique [0002] Photosensitive coatings are used in the production of photovoltaic cells, i.e. semiconductor components used to convert solar radiation into electricity. In photovoltaic cells, the photosensitive layer acts as a solar light (photon) absorber, so it is usually used as the visible surface of the cell and coated with a suitable sunlight permeable (translucent / transparent) electrode material. [0003] One known type of photosensitive coating is photosensitive ink. One ...

Claims

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Application Information

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IPC IPC(8): C07C209/00C07C211/06C07C211/03C07C257/12C07C211/04C07C211/07H01L51/46H01L51/42H01L51/48
CPCC07C209/00C07C211/06C07C211/03C07C257/12C07C211/04C07C211/07H10K71/12H10K85/60H10K30/50H10K85/50C07C209/74H10K85/631B01J31/0235C01P2002/34C01P2002/72C01P2004/03C07F7/24C09D11/52H01G9/2059H10K85/30H10K30/00
Inventor 卡西扬·米兹塔尔康拉德·沃伊切霍夫斯基奥尔加·马林凯维奇兹比格涅夫·米亚拉
Owner 索尔股份公司
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