Unlock instant, AI-driven research and patent intelligence for your innovation.

Two-dimensional organic-inorganic hybrid double perovskite semiconductor crystal and preparation method and application thereof

A double perovskite and organic hybrid technology, applied in semiconductor/solid-state device manufacturing, semiconductor devices, chemical instruments and methods, etc., can solve the problems of lead element toxicity, poor stability, restricting production and application, etc., and achieve high sensitivity detection effect

Pending Publication Date: 2022-07-01
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, problems such as poor stability and the toxicity of lead element restrict the large-scale production and application of this kind of three-dimensional hybrid perovskite materials.

Method used

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-dimensional organic-inorganic hybrid double perovskite semiconductor crystal and preparation method and application thereof
  • Two-dimensional organic-inorganic hybrid double perovskite semiconductor crystal and preparation method and application thereof
  • Two-dimensional organic-inorganic hybrid double perovskite semiconductor crystal and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of organic-inorganic hybrid double perovskite semiconductor crystals (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8

[0030] Synthesis of crystals by cooling crystallization method (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 , the chemical reaction is

[0031] 8C 6 H 5 CH 2 NH 2 +Ag 2 O+Bi 2 O 3 +8HBr→

[0032] 2(C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 +4H 2 O

[0033] Weigh benzylamine (2×10 -3 mol), silver oxide (0.5×10 -3 mol), bismuth oxide (0.5×10 -3 mol) was dissolved in 10 mL of hydrobromic acid (48% by mass), heated to 126° C. and stirred until a yellow clear solution was obtained. Then the obtained solution is naturally cooled to room temperature to obtain yellow flaky crystallites, filtered and dried to obtain the organic-inorganic hybrid double perovskite semiconductor crystal (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 .

Embodiment 2

[0035] Organic-inorganic hybrid double perovskite semiconductor crystals (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 preparation

[0036] Benzylamine (4×10 -3 mol), silver oxide (1×10 -3 mol), bismuth oxide (1×10 -3 mol) was dissolved in 30 mL of hydrobromic acid (48% by mass), heated and stirred to 130° C. and stirred until a yellow clear solution was obtained. The obtained solution was sealed and placed in an oven at 60°C, and the cooling rate was set to 1°C / day. When the oven temperature drops to 30°C, the size of the precipitated solution is 8×4×1mm 3 yellow flaky crystals (such as figure 1 shown), that is, (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 crystal.

[0037] Through X-ray single crystal diffraction analysis, (C prepared in this example) 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 The crystal belongs to the monoclinic system P2 at room temperature 1 / c space group, the unit cell parameters are α=90°, β=90.052(3)°, γ=90°, Z=2.

[0038] from figure 2 It can be seen that (C ...

Embodiment 3

[0040] Benzylamine (4×10 -3 mol), silver oxide (0.5×10 -3 mol), bismuth oxide (0.5×10 -3 mol) was dissolved in 30 mL of hydrobromic acid (47% by mass), heated and stirred to 127° C. and stirred until a yellow clear solution was obtained. The obtained solution was sealed and placed in an oven at 55°C, and the cooling rate was set to 1°C / day. When the oven temperature dropped to 30°C, the solution crystallized.

[0041] The organic-inorganic hybrid double perovskite semiconductor crystal (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 By UV-Vis absorption spectroscopy (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 analysis of the optical absorption. like image 3 shown, (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 The absorption cut-off edge is 538 nm. According to Tauc formula, it can be deduced that the optical band gap value of this compound is 2.25eV.

[0042] Based on (C 6 H 5 CH 2 NH 3 ) 4 AgBiBr 8 The photoconductive behavior of the planar electrode made of single crystal was studied b...

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

No PUM Login to View More

Abstract

The invention relates to a two-dimensional organic-inorganic hybrid double perovskite semiconductor crystal and a preparation method and application thereof. The invention relates to an organic-inorganic hybrid double perovskite semiconductor crystal. The chemical formula of an inorganic-organic hybrid semiconductor material is (C6H5CH2NH3) 4AgBiBr8. According to the invention, the organic-inorganic hybrid double-perovskite semiconductor crystal is prepared, and the organic-inorganic hybrid double-perovskite semiconductor crystal is prepared into a planar photoconductive detector, so that high-sensitivity detection of an intrinsic absorption spectrum can be realized. Laser with the wavelength of 405 nm is used for irradiating the single crystal detector, and the photoelectric response of the single crystal detector is tested. When the power density of incident light is 50.9 mW / cm < 2 >, the crystal device shows an obvious photoconductive effect, and the ratio of light current to dark current can reach 1.8 * 10 < 3 >. The result shows that the material has potential application value when being used as a photoconductive detector.

Description

technical field [0001] The invention belongs to the field of artificial crystal materials in the field of functional crystal materials, and particularly relates to a two-dimensional organic-inorganic hybrid double perovskite semiconductor crystal and a preparation method and application thereof. Background technique [0002] In recent years, lead iodine methylamine (CH 3 NH 3 PbI 3 ), represented by organic-inorganic hybrid perovskite materials, has many excellent optoelectronic physical properties, and has become a research hotspot in the field of optoelectronic functional materials. Among them, bulk organic-inorganic hybrid perovskite semiconductors are widely used in photodiodes (LEDs), solar cells, photodetectors due to their high carrier mobility, long carrier diffusion distance, and low-cost solution growth. It has shown great potential in optoelectronic devices such as devices. However, the poor stability and toxicity of lead element restrict the large-scale produ...

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
no application Login to View More
IPC IPC(8): C30B29/54C30B7/08C30B7/14H01L51/42H01L51/46
CPCC30B29/54C30B7/08C30B7/14H10K85/00H10K30/00Y02E10/549
Inventor 罗军华许鹏姬成敏
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI