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

A kind of solid phase synthesis method of inorganic perovskite quantum dots

A technology of solid-phase synthesis and quantum dots, which is applied in the direction of inorganic chemistry, chemical instruments and methods, lead compounds, etc., can solve the problems of limited practical application, poor thermal/chemical stability of perovskite quantum dots, and inability to realize batch preparation, etc. question

Active Publication Date: 2020-12-29
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It must be pointed out that the above synthesis methods are all liquid-phase methods, which require the use of a large amount of organic reagents harmful to the environment, the synthesis cost is expensive, and batch preparation cannot be realized; on the other hand, due to the thermal / chemical Poor stability, its practical application is limited

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
  • A kind of solid phase synthesis method of inorganic perovskite quantum dots
  • A kind of solid phase synthesis method of inorganic perovskite quantum dots
  • A kind of solid phase synthesis method of inorganic perovskite quantum dots

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Analytical pure P 2 o 5 , PbBr 2 , NaBr, Cs 2 O, SrO powder, according to 45P 2 o 5 :20PbBr 2 :10NaBr:13Cs 2 The ratio of O:12SrO (mole percentage) is accurately weighed and placed in a mortar, mixed and ground evenly, placed in an alumina crucible, placed in a resistance furnace, heated to 600°C and kept for 2 hours to melt, then , the glass melt is taken out and quickly poured into the mold to form a block precursor glass. Finally, the obtained precursor glass is placed in a resistance furnace and annealed at 200°C to eliminate internal stress. The obtained precursor glass block is placed in a glass crusher and crushed into small particles, and then these glass particles are put into a ball mill to be further ground into micron-sized glass-ceramic powder. The rotation speed of the ball mill is 480 rpm; the ball milling time is 2 hours.

[0045] figure 1 Medium X-ray diffraction data (scanning range θ: 10-90 degrees) shows that the obtained glass-ceramic powde...

Embodiment 2

[0049] Analytical pure B 2 o 3 , SiO 2 , ZnO, BaO, Cs 2 O, PbBr 2 , PbI 2 , NaI, NaBr powder, according to 30B 2 o 3 :30SiO2 2 :10ZnO:5BaO:5Cs 2 O:5PbBr 2 :5PbI 2 The ratio of :5NaI:5NaBr (mole percentage) is accurately weighed and placed in a mortar, mixed and ground evenly, then placed in an alumina crucible, placed in a resistance furnace, heated to 800°C, and kept for 0.5 hours to melt. Then, the glass melt is taken out and quickly poured into a mold to form a block precursor glass. Finally, the obtained precursor glass is put into a resistance furnace and annealed at 300°C to eliminate internal stress. The obtained precursor glass block is placed in a glass crusher and crushed into small particles, and then these glass particles are put into a ball mill to be further ground into micron-sized glass-ceramic powder. The rotation speed of the ball mill is 600 rpm; the ball milling time is 6 hours.

[0050] According to the same test method as in Example 1, CsPbBr ...

Embodiment 3

[0052] will analyze pure GeO 2 , B 2 o 3 , ZnO, BaO, K 2 O, Cs 2 O, PbBr 2 , PbCl 2 , NaCl powder, by 50GeO 2 :10B 2 o 3 :5ZnO:5BaO:5K 2 O:5Cs 2 O:6PbBr 2 :4PbCl 2 : 10NaCl (mole percent) is accurately weighed and placed in a mortar, mixed and ground evenly, placed in a platinum crucible, placed in a resistance furnace and heated to 700°C for 1 hour to melt, and then The glass melt is taken out and quickly poured into a mold to form a block precursor glass. Finally, the obtained precursor glass is placed in a resistance furnace and annealed at 220°C to eliminate internal stress. The obtained precursor glass block is placed in a glass crusher and crushed into small particles, and then these glass particles are put into a ball mill to be further ground into micron-sized glass-ceramic powder. The rotation speed of the ball mill is 400 rpm; the ball milling time is 8 hours.

[0053] According to the same test method as in Example 1, CsPbBr was precipitated on the gla...

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 discloses a solid-phase synthesis method of inorganic perovskite quantum dots. Force-driven crystallization of precursor glass is promoted by grinding the precursor glass containing Cs,Pb and halogen (Cl, Br and I). The method overcomes various problems in cost, environment friendliness and large-scale preparation of conventional liquid-phase methods. Thermal / chemical stability of amaterial can be substantially improved by using an amorphous glass substrate to wrap CsPbX3 quantum dots.

Description

technical field [0001] The invention relates to the technical field of preparation of solid luminescent materials, in particular to a solid phase synthesis method of inorganic perovskite quantum dots. Background technique [0002] Semiconductor quantum dots are an important class of light conversion materials used in the field of backlight display. Traditional semiconductor quantum dots based on chalcogen compounds are cumbersome to prepare (need to build a core-shell structure), contain toxic Cd elements, and are not conducive to broadening the color gamut of backlight sources due to their wide half-width and low color purity. In recent years, a class of ionic semiconductor quantum dots CsPbX with a perovskite structure 3 (X is Cl, any one in Br, I) causes people's widespread concern, and its preparation method is relatively simple, especially, fluorescence quantum efficiency height (up to more than 90%), half maximum width narrow (20-30 nanometers), With small reabsorpti...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/00
CPCC01G21/006C01P2002/34C01P2002/72C01P2004/03
Inventor 林航项小强王聪勇王元生
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI