CN110865618A - Quantum dot synthesis scheme regulation and control method and optical characteristic sampling subsystem thereof - Google Patents
Quantum dot synthesis scheme regulation and control method and optical characteristic sampling subsystem thereof Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM]
- G05B19/41875—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS], computer integrated manufacturing [CIM] characterised by quality surveillance of production
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/30—Nc systems
- G05B2219/32—Operator till task planning
- G05B2219/32368—Quality control
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a quantum dot synthesis scheme regulation and control method and an optical characteristic sampling subsystem thereof, relating to the field of chemical production and processing, and the technical scheme key points are as follows: the method comprises the following steps that firstly, an optical characteristic sampling subsystem is constructed, wherein the optical characteristic sampling subsystem comprises an excitation light source, an optical sensing device, an optical testing device and a monitoring terminal; step two, obtaining a quantum dot synthesis adjustment process; step three, constructing a real-time control system, wherein the real-time control system comprises S32, a production master control terminal is arranged, the production master control terminal is connected with a controller or an actuator of the quantum dot synthesis equipment after transformation, and the production master control terminal is connected with a monitoring terminal; s33, presetting self-regulation software based on an adjustment process at a production master control terminal; and step four, applying production, wherein the monitoring terminal feeds back monitoring data to the production master control terminal, and the production master control terminal controls the quantum dot synthesis equipment to correct the processing parameters according to the monitoring data. The invention can improve the quality of the processed quantum dots.
Description
Technical Field
The invention relates to the field of chemical production and processing, in particular to a quantum dot synthesis scheme regulation and control method and an optical characteristic sampling subsystem thereof.
Background
With the rapid advance of 5G and ultra-high-definition televisions, quantum dot display has received wide attention from the industry as a main novel display technology. The permeability of quantum dot televisions is continuously improved, and the demand of the display industry for quantum dots is rapidly increased. Quantum dots are generally not suitable for continuous production due to the complexity of their structures and the sensitivity of their optical properties to process control. The method is particularly key to control batch consistency and stability of quantum dot production.
Due to the limitation of equipment and the limitation of appearance time, the quantum dot production is mostly finished by the conventional chemical processing method-manual control intervention mode in the existing quantum dot production equipment.
In the production and processing mode, the quantum dot product is sampled and tested manually by a synthesizer, and then corresponding measures are taken according to the sampling result to control the synthesis process of the quantum dot. Due to the hysteresis of manual operation, the optical properties of the quantum dots at the time are different from those of the quantum dots during testing. Meanwhile, the optical properties of quantum dots are extremely sensitive to the size, structure, element type, element distribution, atmosphere, temperature and the like, and the consistency of the optical properties of different batches of products is difficult to ensure under the same production process conditions, so that the quality of processed products is affected, and therefore a new scheme needs to be provided to solve the problem.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a quantum dot synthesis scheme regulation and control method and an optical characteristic sampling subsystem thereof, which can improve the quality of processed quantum dots.
The technical purpose of the invention is realized by the following technical scheme: a method of quantum dot synthesis scheme modulation, comprising:
the method comprises the following steps of firstly, constructing an optical characteristic sampling subsystem, wherein the optical characteristic sampling subsystem comprises an excitation light source for exciting a target monitoring material to generate fluorescence, an optical sensing device for acquiring the fluorescence, an optical testing device connected to the output end of the optical sensing device and a monitoring terminal of which the electric signal is connected to the output end of the optical testing device;
step two, obtaining a quantum dot synthesis adjustment process, which comprises integrating the relation between the quantum dot synthesis and the optical properties of reaction intermediate products and final products according to actual processing experience, and summarizing the relation into an adjustment process;
step three, constructing a real-time control system, wherein the real-time control system comprises S31 and carrying out semi-automatic or automatic transformation on the quantum dot synthesis equipment; s32, setting a production master control terminal, connecting the production master control terminal with a controller or an actuator of the quantum dot synthesis equipment after transformation, and connecting the production master control terminal with a monitoring terminal; s33, presetting self-regulation software based on an adjustment process at a production master control terminal;
and step four, applying production, wherein the monitoring terminal feeds back monitoring data to the production master control terminal, and the production master control terminal controls the quantum dot synthesis equipment to correct the processing parameters according to the monitoring data.
By adopting the technical scheme, after the invention is applied to quantum dot production and processing, the optical parameters of intermediate products and final products in the quantum dot production process can be obtained, and the quantum dot synthesis scheme can be automatically corrected based on an adjustment process according to the obtained optical parameters, so that the quality of the processed quantum dots is improved.
The invention is further configured to: the excitation light source comprises a light source, a convex lens and a short-pass filter, wherein the convex lens and the short-pass filter are parallel to each other and are positioned on one side of the light source facing the target monitoring material.
Through adopting above-mentioned technical scheme, the light that the light source sent can pass through short-pass filter filtering interference wave band earlier before being used for arousing the target monitoring material, and rethread convex lens assembles light to improve its effect of arousing the material and produce fluorescence.
The invention is further configured to: the optical sensing device comprises an optical fiber probe and a lens, the lens is arranged in a tubular body communicated with the inner cavity of the reaction kettle, the target monitoring material overflows through the lens, and the optical fiber probe is arranged on one side of the lens, which is far away from the target monitoring material.
By adopting the technical scheme, the reaction kettle is separated from the outside through the lens and can be penetrated by light, and the fluorescence which is excited by the materials in the reaction kettle and penetrates through the lens is obtained through the optical fiber probe.
The invention is further configured to: the excitation light source is positioned on one side of the lens, which is far away from the target monitoring material.
By adopting the technical scheme, the reaction kettle does not need to be provided with two ports communicated with the inner cavity for respectively supplying exciting light to enter and supplying the optical sensing device to acquire optical signals.
The invention is further configured to: the optical testing device comprises an optical filter, a fluorescent monochromator and a photomultiplier, the optical filter filters optical signals output by the optical fiber probe, the fluorescent monochromator receives the filtered optical signals and decomposes the filtered optical signals to output, the photomultiplier receives the decomposed monochromatic light and converts the decomposed monochromatic light into electric signals to output to the monitoring terminal, and the monitoring terminal comprises a computer.
By adopting the technical scheme, a user analyzes and processes the electric signal output by the photomultiplier through the monitoring terminal, and the real-time emission wavelength, half-peak width and luminous intensity of the intermediate product and the final product of the reaction system can be detected on line in real time, so that the subsequent quantum dot processing parameters can be adjusted, and the quantum dot quality can be improved.
The invention is further configured to: a lamp with a wavelength adjustable from 200nm to 1000nm is selected as the light source.
Through adopting above-mentioned technical scheme, the user can order about the light source according to the user demand of difference and send the light of different wave bands to its suitability is stronger, and the result of use is better.
In conclusion, the invention has the following beneficial effects:
1. optical parameters of intermediate products and final products in the quantum dot production process can be obtained, and a quantum dot synthesis scheme can be automatically corrected based on an adjustment process according to the obtained optical parameters, so that the quality of the processed quantum dots is improved;
2. manual sampling is not needed, and health damage of high-temperature steam and toxic materials to operators is avoided;
3. monitoring in real time, monitoring optical parameters of the product at any time, having no hysteresis, conveniently and timely taking corresponding measures to adjust the quantum dot synthesis route and the degree and time of the measures;
4. the process is automatically adjusted, uncertainty factors caused by manual intervention are reduced, the production has repeatability, the product quality and batch consistency are ensured, and the product yield is improved;
5. automatic control obviously promotes production efficiency.
Drawings
FIG. 1 is a schematic view of the present invention in use;
FIG. 2 is a partial schematic structural diagram of the present invention, which is mainly used to show an optical sensing device, an excitation light source and a light shielding plate;
FIG. 3 is a block diagram of the present invention, which is mainly used to show the structure of the optical testing apparatus.
In the figure: 1. an excitation light source; 11. a light source; 12. a convex lens; 13. a short pass filter; 2. an optical sensing device; 21. a fiber optic probe; 22. a lens; 23. a tubular body; 3. an optical test device; 31. an optical filter; 32. a fluorescent monochromator; 33. a photomultiplier tube; 4. monitoring a terminal; 5. a light shield.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
Example one
A method of regulating a quantum dot synthesis scheme, comprising:
step one, constructing an optical characteristic sampling subsystem, which comprises an excitation light source 1 for exciting a target monitoring material to generate fluorescence, an optical sensing device 2 for acquiring the fluorescence, an optical testing device 3 connected to the output end of the optical sensing device 2 and a monitoring terminal 4 of which the electrical signal is connected to the output end of the optical testing device 3; the optical characteristic sampling subsystem is described in other embodiments, which will not be described in detail.
Step two, obtaining a quantum dot synthesis adjustment process, which comprises integrating the relation between the quantum dot synthesis and the optical properties of reaction intermediate products and final products according to actual processing experience, and summarizing the relation into an adjustment process;
the above actual processing verification can be understood as: in the process of quantum dot production, workers manually sample and test the intermediate product and the final product, and then correspondingly adjust quantum dot synthesis parameters according to test results, such as: and (4) temperature to verify whether the quantum dot quality reaches an expected ideal value. In the step, if the user has certain manual control intervention experience, the experience can be directly integrated and summarized.
Step three, constructing a real-time control system, which comprises the following steps:
s31, carrying out semi-automatic or automatic transformation on the quantum dot synthesis equipment; for example: replacing a valve on an output pipeline of the intermediate charging bucket with an electric control valve; feeding the powdery material by adopting a weightless feeding machine;
s32, setting a production master control terminal, connecting the production master control terminal with a controller or an actuator of the quantum dot synthesis equipment after transformation, and connecting the production master control terminal with the monitoring terminal 4; the production master control terminal can select a PLC controller so as to be matched with quantum dot synthesis equipment to carry out automatic control transformation;
s33, presetting self-regulation software based on an adjustment process at a production master control terminal;
and step four, applying production, wherein the monitoring terminal 4 feeds back monitoring data to a production master control terminal, the production master control terminal analyzes and processes the monitoring data based on self-regulation software, and the quantum dot synthesis equipment is controlled to correct processing parameters according to the monitoring data.
The following is a description of the parameter adjustment basis and relationship of the adjustment process, for example:
A. and (6) adjusting the temperature. Each quantum dot synthesis scheme has its corresponding synthesis step, where the reaction temperature of each step is relatively fixed. The reaction temperature is adjusted in a small range on the basis of the preset temperature by combining with the concrete practice on the basis of the preset temperature.
According to the law of mass action, there is a rate constant k in the law of mass action, which can be expressed according to the arrhenius equation, including the temperature T and the activation energy Ea. It can therefore be seen that changing the temperature actually affects the rate constant k in the law of mass action. By combining the reality in the quantum dot synthesis, the reaction rate can be accelerated by increasing the reaction temperature, the reaction temperature can be reduced, and the reaction rate can be slowed down. Specifically, aiming at the production of quantum dots, in a certain range, the temperature rise can play a role in reducing the half-peak width of the quantum dots, but the emission wavelength is easy to blue shift; the blue shift of the quantum dot wavelength can be slowed down or stopped by cooling.
B. And adjusting the types of materials. Each quantum dot synthesis scheme has fixed material addition types, and the material type adjustment referred to herein means: within the adjustable range, under the condition of simultaneously adding a plurality of raw materials, whether a certain raw material is added or not is changed in a short time.
For example: when the CdZnS shell layer grows, a cadmium precursor, a zinc precursor and a sulfur precursor are added simultaneously, but when the cadmium and the zinc account for the CdZnS are different, certain influence is exerted on the wavelength of the quantum dots, generally, the wavelength is easy to be red-shifted and increased when the cadmium account is more, and the wavelength is easy to be blue-shifted and reduced when the zinc account is more. The adjustment strategy is that when the wavelength is larger, the addition of the cadmium precursor is suspended; correspondingly, when the wavelength is smaller, the addition of the zinc precursor is suspended.
C. Adjusting the material adding amount. The material addition amount of each quantum dot synthesis scheme is basically fixed, and the material addition amount adjustment refers to: and adjusting the addition amount of the materials within an allowable range on the premise of ensuring the optical parameters of the quantum dots.
For example: in the process of synthesizing the quantum dots, sometimes, when some materials are not completely added, the wavelength or half-peak width of the quantum dots is changed to a large extent, and the continuous deterioration can cause the scrapping of the whole pot of quantum dots. At this time, if the continuous feeding is stopped, the quality of the quantum dots cannot continue to be developed in a bad direction, if the continuous feeding is performed, the parameters of the quantum dots still become poor, and at this time, the feeding amount is inconsistent with the preset amount, but the continuous feeding cannot be performed.
D. And adjusting the feeding speed. The feeding speed of the materials of each quantum dot synthesis scheme is relatively fixed, and due to the difference between raw material batches or the concentration difference of the raw materials in a reaction system, the reaction activity of the raw materials can be changed, so that the reaction rate is influenced.
For example: in the process of quantum dot synthesis, the excessive activity of raw materials can cause the excessive reaction and uneven particle growth, which is manifested by increased half-peak width and reduced fluorescence intensity, so the feeding speed adjustment referred to herein refers to the measure of accelerating or slowing down the feeding speed on the basis of the preset speed, if the optical parameters of the quantum dots are rapidly deteriorated.
In conclusion, after the method is applied, the optical parameters of the intermediate product and the final product in the quantum dot production process can be obtained, and the quantum dot synthesis scheme can be automatically corrected based on the adjustment process according to the obtained optical parameters, so that the quality of the processed quantum dots is improved; meanwhile, the invention also has the following effects:
1. manual sampling is not needed, and health damage of high-temperature steam and toxic materials to operators is avoided;
2. monitoring in real time, monitoring optical parameters of the product at any time, having no hysteresis, conveniently and timely taking corresponding measures to adjust the quantum dot synthesis route and the degree and time of the measures;
3. the process is automatically adjusted, uncertainty factors caused by manual intervention are reduced, the production has repeatability, the product quality and batch consistency are ensured, and the product yield is improved;
4. automatic control obviously promotes production efficiency.
Example two
The optical characteristic sampling subsystem, referring to fig. 1 and 2, includes an excitation light source 1, an optical sensing device 2, an optical testing device 3, and a monitoring terminal 4.
Referring to fig. 2, an excitation light source 1 excites intermediate products and final products in a reaction system to emit fluorescence by excitation light of a predetermined wavelength, and the excitation light source 1 includes a light source 11, a convex lens 12, and a short pass filter 13.
When in use, a packaging shell A can be arranged to fix the excitation light source 1 in the packaging shell A. Convex lens 12 and short-pass filter 13 are parallel arrangement and light source 11 is located the one side that short-pass filter 13 deviates from convex lens 12. At this time, light emitted by the light source 11 is filtered by the short-pass filter 13 to obtain light in a required wavelength range, and then is converged by the convex lens 12 to be emitted from the packaging shell a, so as to excite the target monitoring material to generate fluorescence.
For the exciting light can penetrate into reation kettle (target monitoring material reaction vessel), can choose to communicate its inner chamber at its lateral wall opening, above-mentioned encapsulation casing A installs in the outside position of opening and between the two with transparent material (for example the transparent plate of adaptation opening) partition, this transparent material is sealed to the opening, prevents the material and leaks.
Referring to fig. 2, the optical sensing device 2 includes a fiber optic probe 21 and a lens 22, wherein the lens 22 is mountable and fixed in a tubular body 23 communicating with the inner cavity of the reaction vessel (target monitoring material reaction vessel).
For example: the side wall of the reaction kettle is molded or welded with a first flange joint communicated with the inner cavity of the reaction kettle, the tubular body 23 is made into a flange structure matched with the first flange joint, and the tubular body 23 is fixed on the first flange joint through bolts, so that the inner cavity of the reaction kettle can be observed through the lens 22.
In use, the target monitoring material is passed over the lens 22 for ease of monitoring.
The fiber probe 21 is arranged on one side of the lens 22, which is far away from the target monitoring material, and can be fixed by being arranged on a frame body fixed on the tubular body 23; the optical fiber probe 21 is installed perpendicular to the lens and transmits the received fluorescence to the next stage; the output end of the optical fiber probe 21 is fixedly matched with the optical fiber for transmission.
The fiber optic probe 21 is arranged without contacting the lens 22, with a distance between them, for example: 10 mm; the appropriate distance between the optical fiber probe 21 and the lens 22 can ensure that the high temperature of the reaction kettle can not damage the optical fiber probe 21, the excited fluorescence can be fully irradiated on the whole lens 22, the optical fiber probe 21 can not shield light to form a shadow region, and therefore the using effect is relatively better.
Referring to fig. 3, the optical test device 3 includes a filter 31, a fluorescent monochromator 32, and a photomultiplier 33. When in use, a packaging shell B is arranged, and the three components are installed and fixed in the packaging shell B; the optical fiber at the output end of the optical fiber probe 21 is fixed and extends into the packaging shell B.
The optical filter 31 is located behind the output optical fiber of the optical fiber probe 21, and receives and filters the fluorescence, and the optical filter 31 is selected according to actual requirements, for example: filters are selected that filter short wavelengths. The fluorescence monochromator 32 is located on the side of the optical filter 31 away from the fiber probe 21, and receives the filtered light (optical signal) and decomposes and outputs the light. The photomultiplier 33 is located on the side of the fluorescence monochromator 32 away from the optical filter 31, receives the decomposed monochromatic light, converts the monochromatic light into an electric signal, and outputs the electric signal to the monitoring terminal 4 through a transmission lead, and the monitoring terminal 4 can select a computer (PC). Before the electrical signals are transmitted to the monitoring terminal 4, signal processing circuits may be provided, for example: the A/D conversion module further converts the electric signal, so that the A/D conversion module is more suitable for the processing of the monitored terminal 4.
When the device is used, a user can analyze and process the electric signals output by the photomultiplier 33 through the monitoring terminal 4, and then the real-time emission wavelength, half-peak width and luminous intensity of the intermediate product and the final product of the reaction system can be detected on line in real time, so that the subsequent quantum dot processing parameters can be adjusted, and the quantum dot quality can be improved.
The optical test device 3 and the monitoring terminal 4 may be replaced with a spectrum analyzer as described above.
EXAMPLE III
The optical characteristic sampling subsystem is different from the second embodiment in that: the light source 11 is selected from light source elements capable of emitting blue light, such as: blue light LED lamp.
Example four
The optical characteristic sampling subsystem is different from the second embodiment in that: the light source 11 selects an LED monochromatic light source element emitting light in the wavelength range of 300nm to 600 nm.
EXAMPLE five
The optical characteristic sampling subsystem is different from the second embodiment in that: a lamp with a wavelength adjustable from 200nm to 1000nm is selected as the light source 11, for example: RGB LED lamp pearl.
EXAMPLE six
The optical characteristic sampling subsystem is different from the second embodiment in that: the lens 22 is a lens resistant to high temperature, organic solvents, and acid, alkali, corrosion, such as: quartz glass, which has better strength, can reduce the corrosive influence of materials on the quartz glass and better maintains the optical property after light passes through the quartz glass.
EXAMPLE seven
The optical characteristic sampling subsystem, referring to fig. 2, differs from the second embodiment in that (and the second embodiment share the same diagram): the excitation light source 1 is located on the side of the lens 22 facing away from the target monitoring material and is arranged parallel to the fiber-optic probe 21. A frame structure can be fixed to the tubular body 23, and the light shielding plate 5 is fixed to the frame structure so as to cover the excitation light source 1 and the fiber probe 21.
Above-mentioned setting makes reation kettle needn't set up the opening of two intercommunication inner chambers on the one hand, and on the other hand can utilize light screen 5 not can isolated external light in the time of reverberation, prevents that external light from getting into and disturbing the monitoring result. The shading plate 5 may be a plate sheet structure of pure black.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (6)
1. A method for regulating a quantum dot synthesis scheme, comprising:
the method comprises the following steps of firstly, constructing an optical characteristic sampling subsystem, wherein the optical characteristic sampling subsystem comprises an excitation light source (1) for exciting a target monitoring material to generate fluorescence, an optical sensing device (2) for acquiring the fluorescence, an optical testing device (3) connected to the output end of the optical sensing device (2) and a monitoring terminal (4) of which the electric signal is connected to the output end of the optical testing device (3);
step two, obtaining a quantum dot synthesis adjustment process, which comprises integrating the relation between the quantum dot synthesis and the optical properties of reaction intermediate products and final products according to actual processing experience, and summarizing the relation into an adjustment process;
step three, constructing a real-time control system, wherein the real-time control system comprises S31 and carrying out semi-automatic or automatic transformation on the quantum dot synthesis equipment; s32, setting a production master control terminal, connecting the production master control terminal with a controller or an actuator of the quantum dot synthesis equipment after transformation, and connecting the production master control terminal with a monitoring terminal (4); s33, presetting self-regulation software based on an adjustment process at a production master control terminal;
and step four, application production, wherein the monitoring terminal (4) feeds back monitoring data to the production master control terminal, and the production master control terminal controls the quantum dot synthesis equipment to correct the processing parameters according to the monitoring data.
2. An optical property sampling subsystem applied to the quantum dot synthesis scheme regulation method of claim 1, wherein: excitation light source (1) includes light source (11), convex lens (12) and short pass filter (13) are parallel to each other and are located light source (11) towards target monitoring material one side.
3. The optical property sampling subsystem of claim 2, wherein: the optical sensing device (2) comprises an optical fiber probe (21) and a lens (22), the lens (22) is arranged in a tubular body (23) communicated with the inner cavity of the reaction kettle, the target monitoring material overflows through the lens (22), and the optical fiber probe (21) is arranged on one side of the lens (22) deviating from the target monitoring material.
4. The optical property sampling subsystem of claim 3, wherein: the excitation light source (1) is positioned on one side of the lens (22) which faces away from the target monitoring material.
5. The optical property sampling subsystem of claim 3, wherein: optical test device (3) include light filter (31), fluorescence monochromator (32) and photomultiplier (33), the light signal of optical fiber probe (21) output is filtered in light filter (31), fluorescence monochromator (32) receive the light signal after filtering and decompose the output, photomultiplier (33) receive the monochromatic light after decomposing and convert the signal of telecommunication output to monitor terminal (4), monitor terminal (4) include the computer.
6. The optical property sampling subsystem of claim 2, wherein: a lamp with a wavelength adjustable between 200nm and 1000nm is selected as the light source (11).
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Application publication date: 20200306 |