A kind of controllable neodymium-doped high light-efficiency blue perovskite quantum dots and preparation method thereof

A perovskite and neodymium doping technology is applied in the field of controllable neodymium doped high light-efficiency blue light perovskite quantum dots and their preparation, which can solve the problem of small emission wavelength shift, improvement of perovskite quantum dot quantum dot efficiency, etc. problems, to achieve the effect of improving the tolerance factor, optimizing the thermal cycle stability, and improving the insufficient stability
CN111410957BActive Publication Date: 2021-09-28FUDAN UNIV
6 Cites 1 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
FUDAN UNIV
Publication Date
2021-09-28

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of photoelectric material preparation, and specifically relates to a controllable neodymium-doped high-efficiency blue perovskite quantum dot and a preparation method thereof. body, using dimethylformamide or dimethyl sulfoxide as a solvent, using a ligand-assisted method to in-situ synthesize neodymium-doped blue perovskite quantum dots in toluene solution, the quantum dots are efficient and stable, and can be solution-processed. Easy and fast. By introducing neodymium doping, the fluorescence quantum yield of perovskite quantum dots can be improved. For single bromine halogen perovskite quantum dots, the controllability of the fluorescence peak of perovskite quantum dots can be achieved by changing the doping ratio of neodymium in the precursor solution. Blue shift, blue-green luminescence peak between 459nm-520nm, for neodymium-doped bromine-lead perovskite quantum dots at 459nm luminescence peak, its fluorescence quantum yield is as high as 90% and the half-wave width is only 19nm.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of photoelectric material preparation, and specifically relates to a controllable neodymium-doped high-light-efficiency blue perovskite quantum dot and a preparation method thereof. Background technique

[0002] All-inorganic lead halide perovskite quantum dots (CsPbX 3 ; wherein X=Cl, Br or I) are widely used in solar cells, laser devices, light-emitting diodes, backlight displays, etc. device field, has great application prospects.

[0003] Although through vigorous research and development in recent years, it is reported that the known red and green CsPbX 3 Perovskite quantum dots have a very high fluorescence quantum yield close to 100%. However, in the blue light band, the quantum efficiency of quantum dots obtained by simply adjusting Cl and Br halogens is usually low (below 30%) and stable. poor stability, which limits its potential for industrial applications. In addition, because the components ...

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