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Preparation and application of perovskite nanowires, photoelectric detector and solar cell

A perovskite and nanowire technology, which is applied in the field of nanomaterials and their application fields, can solve the problems of low uniformity and low growth order of lead-halide perovskite nanowires, and achieve the effect of high yield

Inactive Publication Date: 2015-09-16
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For the above defects or improvement needs of the prior art, the object of the present invention is to provide a preparation method of lead halide perovskite nanowires and the application of its products, wherein the key process steps such as reaction solution concentration, temperature, Additional conditions, etc. are improved, compared with the existing technology, it can effectively solve the problems of uniformity and low growth order of lead halide perovskite nanowires, and can grow in a selective area of ​​the substrate with uniform density and orderly direction (ie The direction of the axis of the nanowire remains basically the same), and the grown lead halide perovskite can be better combined with other components or preparation methods of existing devices (such as being combined into photodetectors, solar cells, etc.), to improve the performance of the device

Method used

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  • Preparation and application of perovskite nanowires, photoelectric detector and solar cell
  • Preparation and application of perovskite nanowires, photoelectric detector and solar cell
  • Preparation and application of perovskite nanowires, photoelectric detector and solar cell

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Embodiment 1

[0039] Embodiment 1: the growth of perovskite nanowires on a substrate comprises the following steps:

[0040] a. Methylamine iodide (CH 3 NH 3 I) and the halogen salt of lead (halogen includes chlorine, bromine, iodine, such as PbCl 2 ) according to the nominal molar ratio (ie molar ratio CH 3 NH 3 I: PbCl 2 =1:1) dissolved in DMF (ie, dimethylformamide) solution to prepare perovskite precursor solution, in which lead halide perovskite CH 3 NH 3 wxya 2 The mass fractions are 10%, 1%, 0.1%, respectively.

[0041] Lead halide perovskite CH in this embodiment 3 NH 3 wxya 2 , X=Cl, Br, I, therefore, according to these three situations of X, the raw materials corresponding to the types and amounts of substances can be selected.

[0042] b. Cut the glass substrate to 1.5cm×1.5cm, and clean it ultrasonically. Take 1uL of the precursor solution and drop-coat it on the surface of the substrate, place it in an air environment at about 30°C, and let it stand for about 3 hours...

Embodiment 2

[0043] Example 2: Controlling the Uniformity, Selectivity and Order of Growth of Perovskite Nanowires on a Substrate

[0044] a. Uniformity of nanowire growth: 1) Clean quartz (i.e. SiO 2 ) base, ultrasonic cleaning with acetone, ethanol and deionized water; 2) doing hydrophilic treatment to the base, concentrated sulfuric acid hydrogen peroxide mixed solution (the mass percentage concentration of concentrated sulfuric acid is 98%, and the mass percentage concentration of hydrogen peroxide is 30% The mixed solution of concentrated sulfuric acid and hydrogen peroxide is a mixture of 98% concentrated sulfuric acid and 30% hydrogen peroxide in a volume ratio of 5:2) boiled at 80°C for two hours, soaked in DMF solvent for 1 hour, and then treated with ultraviolet ozone for 30 minutes ; 3) Drop-coat 1uL prepared solution, after treatment, the solution can spread evenly on the surface of the substrate, and after standing for 3 hours, the perovskite nanowires will grow evenly on the ...

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Abstract

The present invention discloses preparation and application of perovskite nanowires, a photoelectric detector and a solar cell. A preparation method of the perovskite nanowires comprises: (1) dissolving iodinated methylamine and haloid of lead in dimethyl formamide solution to prepare lead-halide perovskite precursor solution; (2) carrying out ultraviolet and ozone treatment on a substrate for at least 30 minutes to obtain the substrate with hydrophilcity; (3) roughening the edge of one end of the substrate and dispensing or spraying the lead-halide perovskite precursor solution on the substrate; and then jacking up the roughened edge end to enable an included angle to be formed between the substrate and the horizontal plane, carrying out standing and heating the substrate to obtain the lead-halide perovskite nanowires. According to the present invention, the lead-halide perovskite nanowires which are uniform in density and are ordered in direction can grow in a selective region of the substrate; and moreover, the grown lead-halide perovskite can be well combined with other parts or preparation methods of existing devices (for example, the lead-halide perovskite can be combined with other parts of the existing devices into the photoelectric detector, the solar cell and the like), so that performance of the devices are improved.

Description

technical field [0001] The invention belongs to the field of nanomaterials and their applications, and more specifically, relates to a preparation method of a lead-halide perovskite nanowire, a photodetector and a solar cell, and an application of a lead-halide perovskite nanowire. The lead-halide perovskite nanowire The ore nanowires are organic / inorganic hybrid lead halide perovskites (CH 3 NH 3 wxya 2 ) nanowires, which are used in the arrangement control of device substrates, as well as photoelectric conversion and optoelectronic devices in the direction of electro-optical conversion. Background technique [0002] Perovskite materials refer to the traditional meeting ABX 3 stoichiometric ratio, and have a large class of materials with perovskite crystal structure. Organic / inorganic hybrid lead halide perovskite materials (CH 3 NH 3 wxya 2 ), due to its adjustable band gap, high light absorption coefficient, excellent carrier generation and separation capabilities,...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/44H01L51/48H01L31/042H01L31/09B82B3/00
CPCH01L31/036H01L31/042H01L31/09Y02E10/50
Inventor 宋海胜邓辉乔柯柯董东冬
Owner HUAZHONG UNIV OF SCI & TECH
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