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

Divalent manganese doped cspbcl 3 Perovskite quantum dot glass fluorescent temperature probe composite material and its preparation method and application

A quantum dot glass, fluorescence temperature technology, applied in the direction of thermometers, thermometers, and heat measurement by physical/chemical changes, can solve problems such as unfavorable fluorescent signal recognition, unsuitable for low temperature detection, and inability to achieve electronic thermal population, etc. Accurate low temperature measurement, simple preparation process and low cost effect

Active Publication Date: 2021-05-11
FUJIAN NORMAL UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the conventional temperature probe material based on the fluorescence intensity ratio is doped into the matrix with a single rare earth ion as a fluorescence activator, and the two energy levels of the ion position are selected as the thermal coupling pair, and the Er 3+ ionic 2H 11 / 2 and 4S 3 / 2 Take the thermally coupled energy level pair as an example, the emission peaks of the two are located at about 535 nm and 550 nm respectively, and the distance between them is about 15 nm; because the two emission peaks are too close, they may even overlap, which is not conducive to the two fluorescence signals identification, unable to meet the needs of high-precision measurement
In addition, although this traditional rare-earth ion-doped luminescent material has been extensively studied for fluorescence thermometry based on rare-earth thermally coupled energy levels, it is not suitable for the application of low temperature detection

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
  • Divalent manganese doped cspbcl <sub>3</sub> Perovskite quantum dot glass fluorescent temperature probe composite material and its preparation method and application
  • Divalent manganese doped cspbcl <sub>3</sub> Perovskite quantum dot glass fluorescent temperature probe composite material and its preparation method and application
  • Divalent manganese doped cspbcl <sub>3</sub> Perovskite quantum dot glass fluorescent temperature probe composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Will P 2 o 5 , B 2 o 3 , ZnO, BaCO 3 、Na 2 CO 3 、Cs 2 CO 3 , PbCl 2 , KCl and MnCl 2 Powder, according to 15P 2 o 5 : 24B 2 o 3 : 28.7ZnO: 5.2BaCO 3 : 4.1Na 2 CO 3 : 6.8Cs 2 CO 3 : 5.1PbCl 2 : 10.1KCl: 1MnCl 2 The ratio of (molar ratio) is accurately weighed and placed in an agate mortar, ground for half an hour to make it evenly mixed, then placed in a crucible, heated to 800°C in a program-controlled high-temperature box-type resistance furnace, and kept for 1 hour, then , quickly pour the glass melt into a copper mold preheated at 200°C to form it; put the obtained precursor glass into a resistance furnace, and keep it at 350°C for 2 hours to obtain the quantum dot glass.

[0030] X-ray Diffraction Patterns Show Cubic Structure CsPbCl Precipitated in Oxide Glass Matrix 3 Quantum dots (Figure 1); transmission electron microscope observation confirmed that there are a large number of CsPbCl in the glass ceramics with a size of about 5-10nm 3 The p...

Embodiment 2

[0032] Will P 2 o 5 , B 2 o 3 , ZnO, BaCO 3 、Na 2 CO 3 、Cs 2 CO 3 , PbCl 2 , KCl and MnCl 2 Powder, according to 15P 2 o 5 : 23B 2 o 3 : 28.7ZnO: 5.2BaCO 3 : 4.1Na 2 CO 3 : 6.8Cs 2 CO 3 : 5.1PbCl 2 : 10.1KCl: 2MnCl 2 The ratio of (molar ratio) is accurately weighed and placed in an agate mortar, ground for half an hour to make it evenly mixed, then placed in a crucible, heated to 800°C in a program-controlled high-temperature box-type resistance furnace, and kept for 1 hour, then , quickly pour the glass melt into a copper mold preheated at 200°C to form it; put the obtained precursor glass into a resistance furnace, and keep it at 350°C for 2 hours to obtain the quantum dot glass. Temperature-variable spectroscopy tests show that as the temperature increases, the emission intensity of quantum dots decreases sharply while Mn 2+ The ion emission intensity only changes slightly, and the temperature measurement sensitivity can be obtained by taking the fluore...

Embodiment 3

[0034] Will P 2 o 5 , B 2 o 3 , ZnO, BaCO 3 、Na 2 CO 3 、Cs 2 CO 3 , PbCl 2 , KCl and MnCl 2 Powder, according to 15P 2 o 5 : 20B 2 o 3 : 28.7ZnO: 5.2BaCO 3 : 4.1Na 2 CO 3 : 6.8Cs 2 CO 3 : 5.1PbCl 2 : 10.1KCl: 5MnCl 2 (Molar ratio) is accurately weighed and placed in an agate mortar, ground for more than half an hour to make it evenly mixed, then placed in a crucible, heated to 900°C in a program-controlled high-temperature box-type resistance furnace, and then kept for 0.5 hours. Then, the glass melt was quickly poured into a copper mold preheated at 200°C for forming; the obtained precursor glass was placed in a resistance furnace, and kept at 350°C for 2 hours to obtain quantum dot glass. Temperature-variable spectroscopy tests show that as the temperature increases, the emission intensity of quantum dots decreases sharply while Mn 2+ The ion emission intensity only changes slightly, and the temperature measurement sensitivity can be obtained as the temp...

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
sizeaaaaaaaaaa
Sensitivityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a divalent manganese doped CsPbCl 3 Perovskite quantum dot glass fluorescent temperature probe composite material and its preparation method and application. The quantum dot glass composition is as follows P 2 o 5 : x mol﹪; B 2 o 3 : y mol﹪; ZnO: 28.7mol﹪; BaCO 3 : 5.2mol﹪; Na 2 CO 3 : 4.1mol﹪; Cs 2 CO 3 : 6.8mol﹪; PbCl 2 : 5.1mol﹪; KCl: 10.1mol﹪; MnCl 2 : z mol﹪; where x+y+z=40 and 15≤x≤30, z=1~5. The above-mentioned quantum dot glass is prepared by melt quenching method and subsequent crystallization heat treatment. The quantum dot glass of the present invention can simultaneously detect the 3 Quantum dot excitonic violet and Mn 2+ Dual-mode emission of red light. With the increase of temperature (77K‑293K), quantum dot violet light and Mn 2+ The red light fluorescence intensity ratio is used as a temperature measurement parameter, and the temperature sensitivity can reach up to 4﹪K ‑1 .

Description

technical field [0001] The invention relates to the field of solid luminescent materials, in particular to a divalent manganese-doped CsPbCl 3 Perovskite quantum dot glass fluorescent temperature probe composite material and its preparation method and application. Background technique [0002] Accurate measurement of temperature is of great significance for exploring many important physical phenomena and application research of new materials. The traditional contact temperature measurement uses heat exchange to realize the thermal balance. Since it needs to be in direct contact with the object to be measured, its application range will be greatly limited. [0003] In recent years, researchers have proposed a novel fluorescent temperature detection non-contact temperature measurement technology. This technology uses a luminescent material as a temperature probe, and detects the temperature by measuring the change of the fluorescence intensity ratio of the material with temp...

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): C03C10/16C03C4/12C03C6/06C03B32/02G01K11/32
Inventor 陈大钦柳月陈江坤黄海
Owner FUJIAN NORMAL UNIV