A kind of all-inorganic perovskite nanosheet and its preparation method and application

A technology of inorganic calcium and nanosheets, applied in the field of nanomaterials, to achieve the effects of good size uniformity, good stability, and continuously adjustable size
CN107032392BActive Publication Date: 2019-04-02SUZHOU UNIV
3 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SUZHOU UNIV
Publication Date
2019-04-02

Smart Images

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

Abstract

The invention relates to an all-inorganic perovskite nanosheet and its preparation method and application. The preparation method adopts a precursor solution with cesium added at room temperature, uses an organic solvent as a solvent and a surfactant, and in an inert gas atmosphere, with a certain The heating rate is gradually raised to the set temperature, then rapidly cooled in an ice-water bath, and the all-inorganic CsPbBr is obtained through repeated centrifugation, redispersion, and washing processes. 3 perovskite nanosheets and apply the material to blue LED devices. The present invention controls the reaction kinetics by adjusting the reaction temperature and reaction time, and obtains highly efficient all-inorganic CsPbBr with a thickness of one to five atomic layers. 3 The perovskite nanosheet has a luminous range of 440nm to 470nm, and the invention realizes its application on blue LED devices and has a good application prospect.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of nanometer materials, in particular to an all-inorganic perovskite nanosheet applicable to blue LED devices, a preparation method and application thereof. Background technique

[0002] Among a wide variety of semiconductor materials, nanomaterials based on perovskite structures have attracted great attention due to their excellent luminescent properties, such as adjustable luminous range, high luminous efficiency and narrow luminous spectral lines. Perovskite structures generally belong to orthorhombic, tetragonal, and cubic crystal systems.

[0003] Organic-inorganic hybrid perovskite CH 3 NH 3 wxya 3 (X=C1, Br, I) can be used to prepare solar cells with an energy conversion efficiency as high as 20% because its absorption spectrum can cover a relatively wide solar spectrum, and the transfer efficiency of electrons and holes is high. As direct bandgap semiconductors, these materials also have the property of em...

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