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A method for preparing lead halide perovskite nanowires by recrystallization method

A perovskite and nanowire technology, applied in the direction of titanium halide, nanotechnology, etc., can solve the problems of complex operation, cumbersome process and difficult operation of the two-step method, so as to save the reaction time, improve the light transmission ability and simple operation. Effect

Inactive Publication Date: 2019-04-16
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Literature Horváth E, Spina M, Szekrényes Z, et al. Nanowires of methylammonium lead iodide (CH 3 NH 3 PB 3 ) prepared by low temperature solution-mediated crystallization[J]. Nano letters, 2014, 14(12): 6761-6766. It is reported that one-dimensional calcium Titanium nanowires, but this method is difficult to operate and requires good skills and is not purely one-dimensional nanowires but also mixed with some bulk perovskites; other literature Zhu P, Gu S, Shen X, et al.DirectConversion ofPerovskite Thin Films into Nanowires with Kinetic Control for Flexible Optoelectronic Devices[J].Nano letters,2016,16(2):871-876. It is reported that a two-step method is used to prepare one-dimensional perovskite, but the operation of the two-step method is complicated and the process is cumbersome

Method used

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  • A method for preparing lead halide perovskite nanowires by recrystallization method
  • A method for preparing lead halide perovskite nanowires by recrystallization method
  • A method for preparing lead halide perovskite nanowires by recrystallization method

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Embodiment 1

[0029] 1) Start ultrasonically cleaning the FTO conductive glass sheet (thickness about 1mm) with detergent for 20 minutes to remove possible organic and inorganic stains on the surface; then rinse with a large amount of tap water; finally put FTO in deionized water Ultrasonic cleaning for 20 minutes; put the above-mentioned cleaned FTO conductive glass into absolute ethanol and ultrasonically clean it for about 20 minutes to remove residual organic impurities on the surface. Repeat this step several times; then ultrasonically clean the FTO conductive glass in acetone for about 20 minutes. For 20 minutes, further remove the residual organic impurities on the surface; take the FTO substrate from the acetone, place it in a UV ozone cleaning machine, and clean it for 30 minutes; the bottom electrode material is SnO doped with fluorine 2 Transparent conductive glass (SnO 2 : F), referred to as FTO.

[0030] 2) Configure 1mol / L CH 3 NH 3 PB 3 The perovskite precursor solution w...

Embodiment 2

[0034] 1) Start ultrasonically cleaning the FTO conductive glass sheet (thickness about 1mm) with detergent for 20 minutes to remove possible organic and inorganic stains on the surface; then rinse with a large amount of tap water; finally put FTO in deionized water Ultrasonic cleaning for 20 minutes; put the above-mentioned cleaned FTO conductive glass into absolute ethanol and ultrasonically clean it for about 20 minutes to remove residual organic impurities on the surface. Repeat this step several times; then ultrasonically clean the FTO conductive glass in acetone for about 20 minutes. For 20 minutes, further remove the residual organic impurities on the surface; take the FTO substrate from the acetone, place it in a UV ozone cleaning machine, and clean it for 30 minutes; the bottom electrode material is SnO doped with fluorine 2 Transparent conductive glass (SnO 2 : F), referred to as FTO.

[0035] 2) Configure 1mol / L CH 3 NH 3 PB 3 The perovskite precursor solution w...

Embodiment 3

[0039] 1) Start ultrasonically cleaning the FTO conductive glass sheet (thickness about 1mm) with detergent for 20 minutes to remove possible organic and inorganic stains on the surface; then rinse with a large amount of tap water; finally put FTO in deionized water Ultrasonic cleaning for 20 minutes; put the above-mentioned cleaned FTO conductive glass into absolute ethanol and ultrasonically clean it for about 20 minutes to remove residual organic impurities on the surface. Repeat this step several times; then ultrasonically clean the FTO conductive glass in acetone for about 20 minutes. For 20 minutes, further remove the residual organic impurities on the surface; take the FTO substrate from the acetone, place it in a UV ozone cleaning machine, and clean it for 30 minutes; the bottom electrode material is SnO doped with fluorine 2 Transparent conductive glass (SnO 2 : F), referred to as FTO.

[0040] 2) Configure 1mol / L CH 3 NH 3 PB 3 The perovskite precursor solution w...

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Abstract

The invention discloses a method for using a recrystallization method to prepare a lead-halide perovskite nanowire. The method comprises the step of dropwise adding a poor solvent and a polar aprotic solvent in a spin coating process of preparation of APbI3 perovskite through a one-step method to prepare the lead-halide perovskite nanowire. The preparing method has the advantages that the operation is simple and convenient, and the reaction time can be saved. One-dimensional perovskite nanocrystalline film prepared through the one-step method is uniform in length and good in coverage degree, and can be used as a candidate material for an optical detector and a laser device. Compared with pure perovskite, the perovskite nanowire has a better optical conduction capability, and can be used in devices like an optical conductor and the laser device.

Description

technical field [0001] The invention belongs to the field of photoelectric thin films, and relates to a method for preparing lead halide perovskite nanowires by a recrystallization method. Background technique [0002] Organic-inorganic hybrid perovskite material AMX 3 With the advantages of high carrier mobility, low exciton binding energy, wide absorption spectrum and adjustable band gap, it is widely used in electronic devices such as solar cells, light-emitting diodes, lasers and photodetectors. The dimension and shape of perovskite have a great influence on its physical and chemical properties. Effective control of the crystal morphology of perovskite is not only beneficial to the basic research of perovskite materials, but also can develop the practical application of perovskite materials. application field. It has been reported in the literature that other crystalline forms of perovskite, such as perovskite quantum dots, one-dimensional perovskite nanowires and two-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/02B82Y40/00
CPCB82Y40/00C01G23/02
Inventor 邱婷苗晓亮张树芳胡延强白帆张陈明
Owner NANJING UNIV OF SCI & TECH
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