Preparation method and application of orthorhombic cesium lead iodide single crystal nanowire

A single-crystal nanometer, lead iodide technology, applied in nanostructure manufacturing, chemical instruments and methods, nanotechnology and other directions, can solve problems such as unfavorable industrial-scale production, unfavorable full-band light-emitting and display devices, and short product length, etc. Achieve the effects of being conducive to industrial scale production, excellent X-ray fluorescence properties, and simple preparation methods

Active Publication Date: 2017-06-20
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this product can produce green fluorescence under the excitation of 320nm light, it and its preparation method have shortcomings. First, the length of the product is too short, only a few microns, which is not conducive to being used in full-band light-emitting and display devices; Secondly, there are too many reactants involved in the preparation method, up to 8 kinds, and the reaction temperature is too high. At the same time, it is necessary to use several raw materials to synthesize intermediate reactants as precursors for further chemical reactions. The complexity of the technology and parameters The control requirements are very high, which is extremely unfavorable for industrial scale production

Method used

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  • Preparation method and application of orthorhombic cesium lead iodide single crystal nanowire
  • Preparation method and application of orthorhombic cesium lead iodide single crystal nanowire
  • Preparation method and application of orthorhombic cesium lead iodide single crystal nanowire

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Experimental program
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Effect test

Embodiment 1

[0036] The concrete steps of preparation are:

[0037] Step 1, first place γ-butyrolactone in a protective atmosphere, stir at 68.5°C for 15 minutes, then add lead iodide in the ratio of 11:2 by weight to γ-butyrolactone In protective atmosphere, γ-butyrolactone under stirring at 72.5°C, brick red turbid liquid is obtained; wherein, the protective atmosphere is nitrogen atmosphere. Then cesium iodide was added to the brick-red turbid liquid to obtain a mixed solution; wherein, the weight ratio of cesium iodide to lead iodide in the brick-red turbid liquid was 1:1.2.

[0038]In step 2, the mixed solution is continuously placed in a protective atmosphere at 68.5° C. and stirred for 100 minutes to obtain a bright yellow mixed solution; wherein the protective atmosphere is a nitrogen atmosphere. After the bright yellow mixed solution is cooled under a protective atmosphere, it is evaporated to dryness at 68.5° C. with a relative humidity of 1%. Wherein, the protective atmosphere ...

Embodiment 2

[0040] The concrete steps of preparation are:

[0041] Step 1, first place γ-butyrolactone in a protective atmosphere, stir at 69.5°C for 15 minutes, then add lead iodide in the ratio of 12:2 by weight to γ-butyrolactone In protective atmosphere, γ-butyrolactone under stirring at 71.5°C, brick red turbid liquid was obtained; wherein, the protective atmosphere was nitrogen atmosphere. Then cesium iodide was added to the brick-red turbid liquid to obtain a mixed solution; wherein, the weight ratio of cesium iodide to lead iodide in the brick-red turbid liquid was 1.1:1.1.

[0042] In step 2, the mixed solution was continuously placed in a protective atmosphere at 69.5° C. and stirred for 95 minutes to obtain a bright yellow mixed solution; wherein the protective atmosphere was a nitrogen atmosphere. After the bright yellow mixed solution is cooled under a protective atmosphere, it is evaporated to dryness at 69.5° C. with a relative humidity of 5%. Wherein, the protective atmos...

Embodiment 3

[0044] The concrete steps of preparation are:

[0045] Step 1, first place γ-butyrolactone in a protective atmosphere, stir at 70.5°C for 15 minutes, then add lead iodide in the ratio of 13:2 by weight of lead iodide and γ-butyrolactone In protective atmosphere, γ-butyrolactone under stirring at 70.5°C, brick red turbid liquid is obtained; wherein, the protective atmosphere is nitrogen atmosphere. Then cesium iodide was added to the brick-red turbid liquid to obtain a mixed solution; wherein, the weight ratio of cesium iodide to lead iodide in the brick-red turbid liquid was 1.2:1.15.

[0046] In step 2, the mixed solution is continuously placed in a protective atmosphere at 70.5° C. and stirred for 90 minutes to obtain a bright yellow mixed solution; wherein the protective atmosphere is a nitrogen atmosphere. After the bright yellow mixed solution is cooled under a protective atmosphere, it is evaporated to dryness at 70.5° C. with a relative humidity of 10%; wherein, the pr...

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Abstract

The invention discloses a preparing method and application of an orthorhombic phase cesium-lead iodide monocrystal nanowire. The preparing method comprises the steps of adding lead iodide to gamma-butyrolactone which is in a protective atmosphere and under stirring at the temperature of 68.5-72.5 DEG C, so that brick red turbid solution is obtained; then adding cesium iodide to the brick red turbid solution to obtain mixed solution; placing the mixed solution in a protective atmosphere at the temperature of 68.5-72.5 DEG C to be stirred constantly for at least 80 min to obtain luminous yellow mixed solution; cooling the luminous yellow mixed solution, and placing the luminous yellow mixed solution in an environment with relative humidity smaller than or equal to 20% and temperature of 68.5-72.5 DEG C to be evaporated to dryness, so that the orthorhombic phase cesium-lead iodide monocrystal nanowire is obtained, wherein the single crystal growth direction of the nanowire is <100>, wire diameter is 0.1-0.15 micron, and wire length is larger than or equal to 100 microns. The nanowire can serve as a basic unit to build a nanowire device or nanowire array device, and can generate X-ray fluorescence of 464+ / -10 and 564+ / -10 nm under the excitation of X rays. The nanomwire is expected to be widely applied to making of nanophotonics basis units, photoelectric detectors, high-energy ray detection and the like.

Description

technical field [0001] The invention relates to a preparation method and application of a single crystal nanowire, in particular to a preparation method and application of an orthorhombic cesium lead iodide single crystal nanowire. Background technique [0002] Cesium lead iodide (CsPbI 3 ) has two crystal structures, which are perovskite structure stable at high temperature and orthorhombic phase structure stable at room temperature. The one-dimensional structure of cesium lead iodide nanowires has excellent luminescence characteristics and has achieved high-quality laser output; in addition, its one-dimensional charge directional conduction characteristics also make it convenient to construct high-efficiency photodetector devices. Therefore, people have made unremitting efforts to obtain cesium lead iodide nanowires in the orthorhombic phase, such as entitled "Solution-PhaseSynthesis of Cesium Lead Halide Perovskite Nanowires", Am.Chem.Soc., 2015, 137(29), 9230-9233 (“So...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/00C09K11/66B82B3/00B82Y30/00B82Y40/00
CPCB82B3/0004B82B3/0009B82Y30/00B82Y40/00C01G21/006C01P2002/72C01P2002/76C01P2004/03C01P2004/04C01P2004/16C09K11/665
Inventor 赵俊乾潘书生李广海
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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