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A zinc oxide nanowire array with methylammonium lead iodine adsorption layer and its preparation method
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A zinc oxide nanowire, methyl ammonium lead technology, applied in the direction of photosensitive equipment, final product manufacturing, sustainable manufacturing/processing, etc., can solve problems such as the inability to effectively control the morphology of methyl ammonium lead iodine, and achieve excellent light absorption performance and electronic Transmission performance, improved solubility, sharp peaks
Active Publication Date: 2018-08-24
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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However, neither of these two methods can effectively control the morphology of methylammonium lead iodide. Basically, there are only two situations, one is to adsorb on the surface of the photoanode material in the form of quantum dots, and the other is to fill in the mesopores.
Therefore, neither of the above two methods can deposit continuous dense films with controllable thickness at room temperature and pressure.
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[0039] In one example, the preparation method of the zinc oxide nanowire array with the lead iodide adsorption layer of the present invention comprises:
[0040] (1) dissolving zinc acetate and monoethanolamine in ethylene glycol methyl ether to form a precursor sol;
[0041] (2) Depositing a zinc oxide seed layer on the FTO glass by dipping and pulling process;
[0042] (3) dissolving zinc nitrate, hexamethylenetetramine and polyethyleneimine in water to form a growth solution;
[0043] (4) growing zinc oxide nanowire arrays by chemical bath deposition;
[0044] (5) Lead nitrate and sodium iodide are dissolved in dehydrated alcohol respectively to form a reaction solution;
[0045] (6) Deposit lead iodide on the surface of zinc oxide nanowires by SILAR (continuous ionic layer adsorption and reaction) method;
[0046] (7) By reacting with methylammonium iodide, the lead iodide on the surface of the zinc oxide nanowires is transformed into methylammonium lead iodide, and a z...
Embodiment 1
[0061] Dissolve polyethylene glycol 400 in absolute ethanol at a ratio of 0.2M, then add 0.1M lead nitrate, and stir until it is completely dissolved to obtain reaction solution 1. Sodium iodide was dissolved in absolute ethanol at a ratio of 0.2M to obtain reaction solution 2. The zinc oxide nanowire array was soaked in reaction solution 1, absolute ethanol, reaction solution 2, and absolute ethanol in sequence, and after 50 cycles, it was heat-treated at 350°C for 1 h on a plate furnace to remove residual organic matter and obtain a lead iodide adsorption layer. Soak the nanowire array with the lead iodide adsorption layer in 80mg / mL methylammonium iodide anhydrous isopropanol solution, take it out after 90 seconds, and wash the residual methylammonium iodide with anhydrous isopropanol, 70 After drying at ℃, the methylammonium lead iodine adsorption layer was obtained.
[0062] figure 1 In the provided XRD pattern, after lead iodide is transformed into methylammonium lead ...
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Abstract
The invention relates to a zinc oxide nanowire array with an ammonium carbamate lead iodide adsorption layer and a preparation method thereof. The zinc oxide nanowire array with the ammonium carbamate lead iodide adsorption layer comprises a zinc oxide nanowire array and an ammonium carbamate lead iodide film which is evenly deposited on the surface of nanowires in the zinc oxide nanowire array. According to the invention, the ammonium carbamate lead iodide adsorption layer which is continuous, dense and thickness-controllable is deposited on the surface of nanowires in the zinc oxide nanowire array; the structure has the excellent performances of light absorption and electron transport; and the zinc oxide nanowire array with the ammonium carbamate lead iodide adsorption layer and the preparation method thereof can be applied in the fields of solar cells, photodetectors and the like.
Description
technical field [0001] The invention relates to a zinc oxide nanowire array with a methylammonium lead iodine adsorption layer and a preparation method thereof, belonging to the field of nanostructure preparation. Background technique [0002] CH was first reported by T. Miyasaka of Tokyo University in 2009 3 NH 3 PbBr 3 and CH 3 NH 3 PB 3 Since quantum dot-sensitized solar cells, new perovskite-structured light-absorbing materials represented by methylammonium lead-iodide have sprung up, constantly setting new records for efficiency. In August 2014, Yang Yang’s research group at UCLA achieved a historical record of 19.3%. sexual efficiency. But so far, the photoanode material is still dominated by titanium oxide nanocrystals. A large number of surface states in the mesoporous film hinder the transmission and collection of electrons, restricting the further improvement of efficiency, and the one-dimensional zinc oxide nanowire array has electron migration. The advanta...
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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01L51/42
CPCY02E10/549Y02P70/50
Inventor 张树德李效民高相东丁旭坤黄宇迪
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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