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

A perovskite quantum dot doped glass with reversible luminescence and preparation method thereof

A technology of doping glass and quantum dots, applied in the field of optical glass, can solve the problems of limited application and inability to precisely control the precipitation position and patterning of perovskite quantum dots

Active Publication Date: 2021-09-21
SOUTH CHINA UNIV OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, heat treatment can only uniformly precipitate perovskite quantum dots in the whole glass (such as CN201810300610.1 and CN201810298816.5), and cannot precisely control the precipitation position and patterning of perovskite quantum dots, which greatly limits its application in the glass industry. Micro-nano optoelectronic devices and applications in the field of optical functions

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 perovskite quantum dot doped glass with reversible luminescence and preparation method thereof
  • A perovskite quantum dot doped glass with reversible luminescence and preparation method thereof
  • A perovskite quantum dot doped glass with reversible luminescence and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing perovskite quantum dot-doped glass with reversible luminescence, comprising the following steps:

[0029] (1-1) Preparation of high temperature heat treatment can precipitate CsPbBr 3 Quantum dot doped glass, as shown in patents CN201810300610.1 and CN201810298816.5, the surface is polished;

[0030] (1-2) Focus the short-pulse laser at a distance of 100 μm from the glass surface obtained in step (1-1), and irradiate different areas inside the glass. The short-pulse laser has a pulse width of 50 fs, a wavelength of 800 nm, and a repetition rate of 1kHz, the average laser power is 10mW, the numerical aperture of the focusing objective lens used is 0.2, and the irradiation time of each area is 0.1s;

[0031] (1-3) Place the glass obtained in step (1-2) in a muffle furnace for low-temperature heat treatment at a temperature of 300 o C, holding time is 1h. Formation of CsPbBr in the laser irradiated area 3 Quantum dots can emit green light under u...

Embodiment 2

[0038] A method for preparing perovskite quantum dot-doped glass with reversible luminescence, comprising the following steps:

[0039] (2-1) Preparation of high temperature heat treatment can precipitate CsPbCl 1.5 Br 1.5 Quantum dot doped glass, as shown in patents CN201810300610.1 and CN201810298816.5, the surface is polished;

[0040](2-2) Focus the short-pulse laser on the surface of the glass obtained in step (2-1) below 100 μm, and irradiate different areas inside the glass. The pulse width of the short-pulse laser is 500 fs, the wavelength is 800 nm, and the repetition frequency is 100kHz, the average laser power is 50mW, and the numerical aperture of the focusing objective lens used is 0.45. The irradiation time of each area is 5s;

[0041] (2-3) Place the glass obtained in step (2-2) in a muffle furnace for low-temperature heat treatment at a temperature of 400 o C, the holding time is 5h. Formation of CsPbCl in the laser irradiated area 1.5 Br 1.5 Quantum dot...

Embodiment 3

[0047] A method for preparing perovskite quantum dot-doped glass with reversible luminescence, comprising the following steps:

[0048] (3-1) Preparation of high temperature heat treatment can precipitate CsPbBr 2 I 1 Quantum dot doped glass, as shown in patents CN201810300610.1 and CN201810298816.5, the surface is polished;

[0049] (3-2) Focus the short-pulse laser on the surface of the glass obtained in step (3-1) below 100 μm, and irradiate different areas inside the glass. The pulse width of the short-pulse laser is 220 fs, the wavelength is 1028 nm, and the repetition frequency is 200kHz, the average laser power is 30mW, the numerical aperture of the focusing objective lens used is 0.9, and the irradiation time of each area is 10s;

[0050] (3-3) Place the glass obtained in step (3-2) in a muffle furnace for low-temperature heat treatment at a temperature of 350 o C, holding time is 10h. Formation of CsPbBr in the laser irradiated area 2 I 1 Quantum dots, which can...

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
wavelengthaaaaaaaaaa
emission peakaaaaaaaaaa
Login to View More

Abstract

The invention discloses a perovskite quantum dot doped glass with reversible luminescence and a preparation method thereof. The preparation method includes: (1) preparing glass doped with Cs, Pb and X, and polishing the surface, wherein X is a halogen; (2) focusing a short-pulse laser on the inside of the glass obtained in step (1), so that the short-pulse laser Different areas inside the glass are irradiated; (3) The glass obtained in step (2) is subjected to heat treatment, and the laser irradiated area forms CsPbX 3 Quantum dots, which emit light under ultraviolet irradiation; (4) The short-pulse laser is refocused on the formation area of ​​quantum dots in step (3) to make the luminescence invalid; (5) The glass obtained in step (4) is heat-treated, and the laser irradiation area Luminous recovery. The method of the invention is simple in process, can selectively precipitate quantum dots in space, and can eliminate the luminescence of quantum dots by short-pulse laser, and restore them through heat treatment.

Description

technical field [0001] The invention belongs to the technical field of optical glass, and relates to a perovskite quantum dot-doped glass with reversible luminescence and a preparation method thereof. Background technique [0002] All-inorganic perovskite quantum dots CsPbX 3 (X=Cl, Br, I) has high-efficiency, adjustable peak, extremely narrow photoluminescence covering the entire visible region, making it attract much attention in the fields of solar cells, light-emitting diodes and other optoelectronic devices. [0003] Perovskite quantum dots are mainly synthesized by hot injection method, recrystallization method, melting method and ultrasonic crushing method. However, due to the intrinsic ionic properties of perovskite materials, the stability of perovskite quantum dots is not high, and its structure is easily affected by the external environment, such as oxygen, water, light, and heat. The perovskite quantum dot doped glass prepared by the melting method can form uni...

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): C03C4/12C03C23/00
CPCC03C4/12C03C23/0025C03C23/007
Inventor 董国平黄雄健陈钦鹏杨中民张勤远邱建荣
Owner SOUTH CHINA UNIV OF TECH