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

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

CN106006722BActive Publication Date: 2017-06-20HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI +1
7 Cites 0 Cited by

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • 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

Examples

Experimental program
Comparison scheme
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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
wavelengthaaaaaaaaaa
full width at half maximumaaaaaaaaaa
Login to View More

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
20 Jun 2017
Publication
CN106006722B
IPC
C01G21/00; C09K11/66; B82B3/00; B82Y30/00; B82Y40/00
CPC
B82B3/0004; B82B3/0009; B82Y30/00; B82Y40/00; C01G21/006; C01P2002/72; C01P2002/76; C01P2004/03
Inventors
赵俊乾; 潘书生