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

A green perovskite quantum dot glass filter

A technology of quantum dot glass and perovskite, applied in optics, optical components, instruments, etc., can solve the problems of high melting temperature, low cut-off degree, and high production cost, and achieve low production temperature, large cut-off depth, and long production cycle Effect

Active Publication Date: 2022-03-22
DALIAN MARITIME UNIVERSITY
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this filter is that the steepness of the transition area between transmission and cut-off is slightly lower, the cut-off degree is slightly lower, etc., and the melting temperature is too high (1380°C) and the time is long (several hours), resulting in high production costs and long production cycles.

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 green perovskite quantum dot glass filter
  • A green perovskite quantum dot glass filter
  • A green perovskite quantum dot glass filter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this embodiment, a borate glass is used as the basic glass, and its chemical composition is as follows: 6Li 2 O-4Na 2 O-2K 2 O-10ZnO-15BaO-7SrO-0.3Sb 2 o 3 -55.7B 2 o 3 , the glass transition temperature of the borate glass is Tg=450°C, the crystallization initiation temperature Tx=624°C, and the crystallization temperature Tc=684°C. The temperature difference Tx-Tg=174°C is very large, which is the allowable heat treatment temperature range above Tg, such as Image 6 As shown, the glass transition temperature Tg, crystallization onset temperature Tx and crystallization temperature Tc are 450°C, 624°C and 684°C, respectively. Perovskite quantum dots are CsPbBr 3 Structure, its crystal phase is cubic phase. Perovskite CsPbBr 3 The concentration of quantum dots is also very important, according to experiments, the effect of 2mol% concentration (molar concentration) is very good. For this basic glass and quantum dots, a concentration of 2 mol % is used in this...

Embodiment 2

[0060] The green perovskite quantum dot glass filter of the present invention is different according to the application requirements, and the filter sometimes needs further processing to meet the performance requirements. For applications such as traffic lights, stage lights, flashlights, laser protection, medical treatment, and beauty, there is generally no need to further deal with the issue of luminescence, and its luminescence can also be used. For spectral filters, such as those on spectroscopic instruments and digital cameras, it is necessary to consider the influence of perovskite quantum dot luminescence. Perovskite quantum dots absorb short-wavelength light below the transmission limit wavelength, which will excite the quantum dots to emit light. like image 3 As shown, the luminescence wavelength of this kind of perovskite quantum dot glass is almost the same as the transmission limit wavelength, and it is necessary to coat a narrow-band reflective dielectric film a...

Embodiment 3

[0062] For some band-pass filtering applications, the long-wave cut-off region can be made by coating the long-wave cut-off dielectric film in the long-wavelength region of the pass-band back end of the perovskite quantum dot glass filter, and combined with the short-wave cut-off caused by quantum dots to form a band-pass filter light sheet, such as Figure 5 shown.

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 provides a green perovskite quantum dot glass filter, which is made of basic glass and perovskite quantum dots. The transparency of the basic glass is made into a green perovskite quantum dot glass filter whose transmission limit wavelength is in the green light region; the green perovskite quantum dot glass filter is a long-wave pass filter with a finely adjustable transmission limit wavelength, high pass-band transmittance and wide pass-band width, large cut-off band optical density and wide cut-off band width, steep transmission-cut-off transition region; perovskite quantum dots include CsPbBr 3 , CsPb 2 Br 5 and Cs 4 PbBr 6 The structure can absorb steeply and cut off at the green wavelength. The green perovskite quantum dot glass filter of the present invention has a wide absorption spectrum range, a large absorption cutoff, a large and flat passband range, a large transmittance, and a steep pass-cutoff transition area; the manufacturing process is simple, the production temperature is low, The short time saves cost and shortens the production cycle.

Description

technical field [0001] The present invention relates to the technical field of colored optical glass filters, in particular to a green perovskite quantum dot glass filter, which is a kind of perovskite quantum dot glass whose transmission threshold wavelength of the absorbing substance is in the green Light zone filters. Background technique [0002] At present, the colored optical glass filter is an optical glass that selectively absorbs or transmits light of certain colors (wavelengths) on the spectrum, also known as filter glass. Colored optical glass is to add some raw materials (colorants) that can color the glass to the composition of colorless glass. The prior art mainly includes optical filters of ionic colorants, metal colloid colorants and sulfur selenium compound colorants. [0003] 1. Ion colorant filter. Using the selective absorption characteristics of transition metal (Ti, V, Cr, Mn, Fe, Co, Ni, Cu, etc.) ions and rare earth (Ce, Pr, Nd, Ho, Sm, etc.) The ...

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): G02B5/22
CPCG02B5/22G02B5/226
Inventor 张希珍陈宝玖孙佳石
Owner DALIAN MARITIME UNIVERSITY