CN110231525A - A kind of measuring system suitable for ferroelectricity photovoltaic material - Google Patents
A kind of measuring system suitable for ferroelectricity photovoltaic material Download PDFInfo
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- CN110231525A CN110231525A CN201910484888.3A CN201910484888A CN110231525A CN 110231525 A CN110231525 A CN 110231525A CN 201910484888 A CN201910484888 A CN 201910484888A CN 110231525 A CN110231525 A CN 110231525A
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- ferroelectricity
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- measuring system
- light source
- probe station
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The invention discloses a kind of measuring system suitable for ferroelectricity photovoltaic material, photoelectric properties and ferroelectricity suitable for ferroelectricity photovoltaic material measure, mainly solve prior art photoelectric properties and ferroelectricity is difficult to the technical issues of measuring simultaneously.The system comprises: DC power supply, arbitrary waveform generator, voltmeter, ammeter, probe station, tunable light source, data acquisition device and display device.The system can be realized the photoelectric properties and ferroelectric in situ measurement to material, can carry out the in situ measurement of photoelectric properties and ferroelectric properties to a certain material simultaneously；DC power supply can be replaced according to material property, realize biggish extra electric field.
Description
Technical field
The present invention relates to material electrical properties fields of measurement, are related specifically to the photo electric with ferroelectricity photovoltaic effect material
It can be measured with ferroelectricity.
Background technique
Photovoltaic effect is many times also referred to as ferroelectricity photovoltaic effect (ferroelectric photovoltaic
Effect, FEPV), this is because it is found in for the first time on this ferroelectric material of BaTiO3." abnormality " tool of kind photovoltaic effect
Body surface is not necessarily to the heterojunction structure of similar p-n junction now, can produce photovoltaic effect on single monocrystal material.Simultaneously because wherein
Energy gap only influences material photo absorption performance, and unrelated with the open-circuit voltage of material etc., therefore can usually see in FEPV device
Measure the huge open-circuit voltage for being several times as much as energy gap.All the time, the principle in relation to ferroelectricity photovoltaic effect is interpreted body Xiang Guangfu
Effect (bulk photovoltaic effect, BPV).The generation of this effect is originated from the characteristic of ferroelectric material spontaneous polarization,
There is induced electric field (the polarization-induced internal that polarizes under the action of polarized dipole and electrical square in material internal
electric field).At the same time, the means such as electric field, applied stress or oriented growth, the intracorporal polarization of ferroelectricity are built by outer
Dipole moment can be adjusted to same direction.If at this moment receiving illumination, the electron hole pair that photon excitation goes out is in built-in pole
Changing can be separated under induced electric field, and be transmitted along polarization direction.Due to the photovoltage (electric current) in ferroelectricity photovoltaic effect
Generation is unrelated with energy gap size, therefore open-circuit voltage can theoretically be far longer than energy gap size.
Currently, ferroelectricity photovoltaic has very big application prospect in the incident photon-to-electron conversion efficiency for improving solar battery, but set at present
Standby is single photoelectric properties test or ferroelectric properties test, it is difficult to realize the photoelectric properties and ferroelectric survey in situ of material
Amount.For further research material it is microcosmic on polarization photoelectric properties are influenced, a kind of photoelectric properties are provided and ferroelectricity is surveyed in situ
Amount system is necessary.
Summary of the invention
Ferroelectricity measurement and photoelectric properties measurement can not in-situ accomplishes simultaneously during present invention aims to solve the prior art
The problem of, provide a kind of photoelectric properties and ferroelectricity in-situ measurement system.
In order to achieve the above objectives, the present invention adopts the following technical scheme:
A kind of measuring system suitable for ferroelectricity photovoltaic material, including DC power supply, arbitrary waveform generator, voltmeter,
Ammeter, probe station, tunable light source, data acquisition device and display device.
Electricity is connected in series in one end of the anode connection arbitrary waveform generator of DC power supply, the arbitrary waveform generator other end
One end of probe station, the cathode of the other end connection DC power supply of probe station is connected in series in flow table, ammeter, and probe station parallel connection connects
Connect voltmeter, ammeter and voltmeter are all connected with data acquisition device and display device, and probe station is equipped with sample, sample it is upper
End is equipped with tunable light source.
DC power supply, required triangular wave when arbitrary waveform generator is for generating ferroelectricity test；
Voltmeter, ammeter, data acquisition device for realizing test when voltage and current data acquisition, analog-to-digital conversion and
Data record；
Probe station is for placing sample and serving as electrode in designated position insertion probe；
Tunable light source provides the illumination of specified power for photoelectricity test.
Preferably, probe used in probe station is beryllium copper material probe, possesses preferable elasticity and electric conductivity.Probe is pricked
Arbitrary waveform generator is exported and is connected with probe by test zone needed for material.
Preferably, liquid metal can be smeared according to demand on probe to increase contact area.
Preferably, tunable light source is wide spectrum light source.It is wider that wide spectrum light source is capable of providing frequency, the more light of type, enriches
The function of measuring system.
Preferably, data acquisition device is equipped with front-end amplifier, to enhance measurement accuracy.
Compared with the existing technology, the beneficial effect that technical solution of the present invention obtains is: the light suitable for ferroelectricity photovoltaic material
Electrical property and ferroelectricity in situ measurement,
Effect one: the in situ measurement of photoelectric properties and ferroelectric properties can be carried out to a certain material simultaneously；
Effect two: DC power supply can be replaced according to material property, realizes biggish extra electric field.
Detailed description of the invention
Fig. 1: each equipment connection schematic diagram；
Fig. 2: arbitrary waveform generator generates voltage waveform；
Fig. 3: typical case has ferroelectricity sample displacement current curve；
Fig. 4: ferroelectric hysteresis loop；
Fig. 5: the switch with photoelectric sample responds.
In attached drawing, 1, DC power supply；2, arbitrary waveform generator；3, tunable light source；4, probe station；5, sample；6, data
Acquisition device and display device；Ammeter voltmeter is marked with conventional sign in figure.
Specific embodiment
In order to which purpose of the present invention technical solution and advantage is more clearly understood, with reference to embodiments, to the present invention
It is further elaborated, it should be understood that the specific embodiments described herein are merely illustrative of the present invention, is not used to
Limit the present invention.
Embodiment 1
As Figure 1-Figure 5, this embodiment provides a kind of measuring system suitable for ferroelectricity photovoltaic material, is suitable for iron
The photoelectric properties and ferroelectricity in-situ measurement system of electric photovoltaic material, including DC power supply, arbitrary waveform generator, voltmeter,
Ammeter, probe station, tunable light source, data acquisition device and display device.
Electricity is connected in series in one end of the anode connection arbitrary waveform generator of DC power supply, the arbitrary waveform generator other end
One end of probe station, the cathode of the other end connection DC power supply of probe station is connected in series in flow table, ammeter, and probe station parallel connection connects
Connect voltmeter, ammeter and voltmeter are all connected with data acquisition device and display device, and probe station is equipped with sample, sample it is upper
End is equipped with tunable light source.
DC power supply, required triangular wave when arbitrary waveform generator is for generating ferroelectricity test；
Voltmeter, ammeter, data acquisition device for realizing test when voltage and current data acquisition, analog-to-digital conversion and
Data record；
Probe station is for placing sample and serving as electrode in designated position insertion probe；
Tunable light source provides the illumination of specified power for photoelectricity test.
In the present embodiment, probe used in probe station is beryllium copper material, possesses preferable elasticity and electric conductivity.
In the present embodiment, liquid metal can be smeared according to demand on probe to increase contact area.
In the present embodiment, tunable light source is wide spectrum light source, and wide spectrum light source is capable of providing that frequency is wider, and type is more
Light enriches the function of measuring system.
In the present embodiment, above-mentioned data acquisition device need to be equipped with front-end amplifier, to enhance measurement accuracy.
The application method of the measuring system of the present embodiment includes:
Using probe station, probe is pricked into the test zone needed for material, arbitrary waveform generator is exported and is connected with probe.
Ferroelectricity measurement: be previously applied a fixed voltage make polarization direction be directed toward same direction, after again sample both ends apply
The triangle wave voltage (as shown in Figure 2) of one preprogramming.If sample is ferroelectric, obtained current curve shape such as Fig. 2 institute
Showing, it can be seen that there is displacement current before first triangle wave voltage peak value forward or backwards in it, and forward or backwards
Second basic no signal of triangular wave.The corresponding current subtraction in two peaks can eliminate leakage current caused by electricresistance effect, obtain
Pure displacement current.
Using following formula, ferroelectric hysteresis loop (such as Fig. 4) can be obtained by simple integral.
Photoelectric properties measurement: it can be obtained if the material has photoelectric properties such as Fig. 5 with fixed frequency switch tunable light source
Shown in typical switching current.
The technical means disclosed in the embodiments of the present invention is not limited only to technological means disclosed in above embodiment, further includes
Technical solution consisting of any combination of the above technical features.It should be pointed out that for those skilled in the art
For, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (5)
1. a kind of measuring system suitable for ferroelectricity photovoltaic material, it is characterised in that:
Including DC power supply, arbitrary waveform generator, voltmeter, ammeter, probe station, tunable light source, data acquisition device and
Display device；One end of the anode connection arbitrary waveform generator of DC power supply, the arbitrary waveform generator other end are connected in series
One end of probe station, the cathode of the other end connection DC power supply of probe station, probe station parallel connection is connected in series in ammeter, ammeter
Voltmeter is connected, ammeter and voltmeter are all connected with data acquisition device and display device, and probe station is equipped with sample, sample
Upper end is equipped with tunable light source.
2. a kind of measuring system suitable for ferroelectricity photovoltaic material as described in claim 1, it is characterised in that: the spy of probe station
Needle is beryllium copper material probe, and probe is pricked in sample testing area.
3. a kind of measuring system suitable for ferroelectricity photovoltaic material as claimed in claim 2, it is characterised in that: smeared on probe
Liquid metal.
4. any one as described in claim 1-3 is suitable for the measuring system of ferroelectricity photovoltaic material, it is characterised in that: adjustable
Light source is wide spectrum light source.
5. a kind of measuring system suitable for ferroelectricity photovoltaic material as claimed in claim 4, it is characterised in that: data acquisition dress
Set outfit front-end amplifier.
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| CN201910484888.3A CN110231525A (en) | 2019-06-05 | 2019-06-05 | A kind of measuring system suitable for ferroelectricity photovoltaic material |
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| CN201910484888.3A CN110231525A (en) | 2019-06-05 | 2019-06-05 | A kind of measuring system suitable for ferroelectricity photovoltaic material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114002483A (en) * | 2022-01-04 | 2022-02-01 | 苏州大学 | Transient photovoltage measuring system in liquid in-situ reaction |
| CN115184644A (en) * | 2022-06-30 | 2022-10-14 | 北京浦丹光电股份有限公司 | Contact type electricity measuring device and method thereof |
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| CN115184644A (en) * | 2022-06-30 | 2022-10-14 | 北京浦丹光电股份有限公司 | Contact type electricity measuring device and method thereof |
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