CN107359860A - A kind of perovskite solar cell electron lifetime method of testing based on EIS analyses - Google Patents
A kind of perovskite solar cell electron lifetime method of testing based on EIS analyses Download PDFInfo
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- CN107359860A CN107359860A CN201710507702.2A CN201710507702A CN107359860A CN 107359860 A CN107359860 A CN 107359860A CN 201710507702 A CN201710507702 A CN 201710507702A CN 107359860 A CN107359860 A CN 107359860A
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- perovskite solar
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- 238000004458 analytical method Methods 0.000 title claims abstract description 22
- 238000010998 test method Methods 0.000 title claims abstract description 13
- 238000005259 measurement Methods 0.000 claims abstract description 6
- 238000012360 testing method Methods 0.000 claims description 22
- 238000001453 impedance spectrum Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 13
- 150000001875 compounds Chemical class 0.000 claims description 8
- 230000009466 transformation Effects 0.000 claims description 7
- 238000005286 illumination Methods 0.000 claims description 6
- 230000003247 decreasing effect Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- JTCFNJXQEFODHE-UHFFFAOYSA-N [Ca].[Ti] Chemical compound [Ca].[Ti] JTCFNJXQEFODHE-UHFFFAOYSA-N 0.000 description 2
- 238000004451 qualitative analysis Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
- H02S50/15—Testing of PV devices, e.g. of PV modules or single PV cells using optical means, e.g. using electroluminescence
-
- 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
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/392—Determining battery ageing or deterioration, e.g. state of health
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The invention discloses a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses, by applying certain Dc bias on perovskite solar cell, and disturbing signal is used as using the ac voltage signal of small amplitude, and then obtain the EIS collection of illustrative plates of perovskite solar cell, equivalent-circuit model is established by certain electronic component, analysis is fitted to the equivalent circuit of structure using Z view softwares, each component parameters in model are determined, the electron lifetime of perovskite solar cell is calculated by formula.The present invention uses EIS, reduces the infringement to cell piece, improves the precision of measurement, the life-span of electronics can be intuitively calculated by fitting result, operand is greatly reduced, improves calculating speed, has good application value.
Description
Technical field
The present invention relates to a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses, belong to film device
Part Charge transfer on interface field of measuring technique.
Background technology
Solar energy power generating is a kind of effective means for the energy and environment for solving the problems, such as current getting worse, nearest
In several years, new perovskite solar cell obtains fast development, and its highest photoelectric transformation efficiency has reached more than 20%, although
Perovskite efficiency of solar cell is constantly being lifted, but for the silion cell of current large-scale application, perovskite battery
Efficiency and put goods on the market using still having much room for improvement.One of the key factor for influenceing perovskite efficiency of solar cell be electronics-
Hole it is compound, a part of light induced electron can lose because of the recombination process of inside battery, and then can not form photoelectric current.Institute
The key of the efficient perovskite solar cell of exploitation is turned into to study the Charge transfer on interface mechanism of light induced electron.
Electron lifetime is to describe the important parameter of Charge transfer on interface speed, and under thermal equilibrium condition, this parameter represents
Electronics constantly by valence to conduction band, produces electron hole pair, and at the same time, they are again ceaselessly compound.
The content of the invention
The technical problems to be solved by the invention are the defects of overcoming prior art, there is provided a kind of calcium based on EIS analyses
Titanium ore solar cell electron lifetime method of testing, realize and utilize electric transmission, transfer, compound etc. in EIS atlas analysis cell pieces
Process, to characterize perovskite inside battery carrier behavior.
In order to solve the above technical problems, the present invention provides a kind of perovskite solar cell electron lifetime based on EIS analyses
Method of testing, comprise the following steps:
1)Select an efficient perovskite solar battery sheet;
2)Start electrochemical workstation, apply certain Dc bias to selected perovskite solar battery sheet, and to shake
Width be 10 mV -20 mV ac voltage signal as disturbing signal, test frequency is 0.1 Hz -106Hz scopes are surveyed
Amount, obtains the perovskite solar battery sheet impedance spectrum;
3)Impedance spectrum is obtained to measurement to be fitted, establish equivalent-circuit model, and obtain equivalent-circuit model using ZView
Component parameters;
4)According to formula τn=1/ωr=Rr*CμElectron lifetime in perovskite solar battery sheet is calculated,
According to formula τn=1/ωr=1/2πfmaxThe changing rule of electron lifetime is analyzed,
Wherein, τnFor electron lifetime, fmaxFor frequency, ω corresponding to baud figure intermediate frequency rate section peakrIt is electronics in finite layer
The constant compound angular frequency of diffusion, itself and fmaxRelation be ωr=2πfmax, RrAnd CμIt is compound that different interface electronics are represented respectively
Resistance and electric capacity, RrAnd CμBy step 3)Fitting obtains, ωrJudged in impedance spectrum according to characteristic peaks.
Foregoing step 1)In, select one group of efficient perovskite solar battery sheet method for:Under the same conditions, make
Standby some perovskite solar battery sheets, the I-V characteristic curve of the perovskite solar battery sheet under certain illumination is tested, is calculated
Obtain photoelectric transformation efficiency, fill factor, curve factor, choose photoelectric transformation efficiency and all high cell piece of fill factor, curve factor.
Foregoing step 2)In, the Dc bias applied is electric for the work of perovskite solar battery sheet different operating point
Pressure.
Foregoing step 3)Concrete operations it is as follows:
3-1)Press high frequency band, mf band and low-frequency band analysis measurement result first, establish high frequency band using resistance R with
Normal phase element CPE is in parallel, and middle low-frequency band uses the equivalent-circuit model of TL or G elements;
3-2)For electronic component the resistance R, normal phase element CPE and electric capacity C, using ZView softwares in equivalent-circuit model
It is fitted, determines each component parameters, corresponding element is finally increased and decreased according to fitting result and then adjusts equivalent-circuit model,
Optimize.
Foregoing high frequency band is 106-103Hz, mf band 103- 10 Hz, low-frequency band 10-0.1Hz.
The changing rule of foregoing electron lifetime is:The characteristic frequency f at crestmaxMoved to high frequency treatment, then τnReduce,
The characteristic frequency f at crestmaxMoved to low frequency, then τnIncrease.
The beneficial effect that is reached of the present invention is:
The present invention can quickly analyze the life-span for calculating perovskite solar cell piece light induced electron using EIS collection of illustrative plates, save the time,
Reliable results, contribute to the Charge transfer on interface mechanism of porous membrane in further research perovskite solar cell, for research
Perovskite thin film Charge transfer on interface provides reliably characterization method, design and exploitation to efficient perovskite solar cell
With great importance.
Brief description of the drawings
Fig. 1 is the flow chart of the perovskite solar cell electron lifetime method of testing based on EIS analyses of the present invention;
Fig. 2 is the perovskite solar cell test and the Nai Sikuitetu of fitting of embodiment 1;
Fig. 3 is the perovskite solar cell test and the Bode diagram of fitting of embodiment 1;
Fig. 4 is the perovskite solar cell test and the Nai Sikuitetu of fitting of embodiment 2;
Fig. 5 is the perovskite solar cell test and the Bode diagram of fitting of embodiment 2.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.Following examples are only used for more clear
Illustrate to Chu technical scheme, and can not be limited the scope of the invention with this.
The method based on EIS atlas analysis perovskite solar cell electron lifetimes of the present invention, as shown in figure 1, specifically such as
Under:
1)Select an efficient perovskite solar battery sheet.
2) start electrochemical workstation, apply certain Dc bias to selected perovskite solar battery sheet, and
With small amplitude(10-20 mV)Ac voltage signal as disturbing signal, test frequency is from 0.1 Hz -106Hz, measure
Obtain the impedance spectrum corresponding to the cell piece.Wherein, the Dc bias applied is perovskite solar battery sheet difference work
Make the operating voltage of point.
3)ZView is opened, establishes equivalent circuit, obtaining impedance spectrum to measurement is fitted, and obtains the member of equivalent circuit
Part parameter;Specific method is as follows:
3-1)High frequency band is pressed first(106-103Hz), mf band(103-10 Hz)And low-frequency band(10-0.1Hz)Analysis
Test result, suitable electronic component such as resistance R, electric capacity C, normal phase element CPE, equivalence element TL or G etc. are selected, established
High frequency band is in parallel with normal phase element CPE using resistance R, and middle low-frequency band uses the equivalent-circuit model of TL or G elements.
3-2)For electronic component the resistance R, normal phase element CPE and electric capacity C, using ZView in equivalent-circuit model
Software is fitted, and determines each component parameters in equivalent-circuit model, and finally increasing and decreasing corresponding element according to fitting result enters
And equivalent-circuit model is adjusted, to obtain optimal result.
4)According to formula τn=1/ωr=Rr*CμElectron lifetime in perovskite solar battery sheet is calculated, wherein, RrAnd CμIt is logical
Cross step 3)Fitting obtains;
According to formula τn=1/ωr=1/2πfmaxThe changing rule of electron lifetime is analyzed, wherein, ωrAccording to spy in impedance spectrum
Peak value is levied to judge.
The characteristic frequency f at crestmaxMoved to high frequency treatment, then τnReduce, the characteristic frequency f at crestmaxTo at low frequency
Move, then τnIncrease.
Wherein, τnFor electron lifetime, fmaxFor frequency, ω corresponding to baud figure intermediate frequency rate section peakrHaving for electronics
Limit the constant compound angular frequency of layer diffusion, itself and fmaxRelation be ωr=2πfmax, RrAnd CμDifferent interface electronics are represented respectively
Combined resistance RrWith electric capacity Cμ.Rr, CμValue can pass through be fitted obtain, ωrIt can be sentenced in impedance spectrum according to characteristic peaks
It is disconnected.
Embodiment 1:
High performance perovskite solar battery sheet 1 is chosen, starts electrochemical workstation, opens solar simulator(Oriel
Sol3A), test and obtain in illumination(100W/cm2)Under the conditions of EIS, open Zview softwares, equivalent circuit is established, to being surveyed
The impedance spectrum of examination is fitted.Concrete operations are as follows:
1)The method for choosing high performance calcium titanium ore solar battery sheet:Under the same conditions, some perovskite solar-electricities are prepared
Pond piece, the I-V characteristic curve of the perovskite solar battery sheet under certain illumination is tested, its photoelectric transformation efficiency is calculated,
The parameters such as fill factor, curve factor, the of a relatively high cell piece of Selecting All Parameters, are designated as battery 1.
2)The key step of EIS tests:Start ZView softwares, into impedance interface, 10mV exchange perturbation, 0mV are set
Dc bias and scan frequency be 0.1 Hz -106Hz, after open-circuit voltage is stable, clicks on start and start to test.
3)The EIS obtained according to test, establishes equivalent circuit, the impedance spectrum tested is fitted, obtain equivalent
The component parameters of circuit:Different interface electronics combined resistance RrWith electric capacity Cμ, according to formula τn=1/ωr=Rr*CμCalculate the electronics longevity
Order τn, according to formula τn=1/ωr=1/2πfmax, the qualitative analysis Battery pack electron lifetime, fmaxFor baud figure intermediate frequency rate section most
Frequency corresponding to high point.
Fit procedure is as follows:Crossover rate piecewise analysis test result first, high-frequency section use RhfAnd ChfFitting in parallel,
In medium/low frequency band, for the EIS with obvious 45 ° of electrical transmission lines, it is fitted using TL equivalent-circuit components, according to fitting
Numerical value, obtain parameter RrAnd CμValue be respectively 1046 Ω, 2.95E-06F, utilize formula τn=1/ωr=Rr*CμObtain electronics
Life-span is 3.08E-03s, utilizes formula τn=1/ωr=1/2πfmaxAnalyze electron lifetime.
Fig. 2 is the perovskite solar cell test of the embodiment and the Nai Sikuitetu of fitting, Fig. 3 are the embodiment
Perovskite solar cell test and the Bode diagram of fitting.It can be seen that fitting result is preferable, illustrate the measuring method
With reliability.
Embodiment 2
High performance perovskite solar battery sheet 2 is chosen, starts electrochemical workstation, opens solar simulator(Oriel
Sol3A), test and obtain in illumination(100W/cm2)Under the conditions of EIS, open Zview softwares, equivalent circuit is established, to being surveyed
The impedance spectrum of examination is fitted.Concrete operations are as follows:
1)The method for choosing high performance calcium titanium ore solar battery sheet:Under the same conditions, some perovskite solar-electricities are prepared
Pond piece, the I-V characteristic curve of the perovskite solar battery sheet under certain illumination is tested, its photoelectric transformation efficiency is calculated,
The parameters such as fill factor, curve factor, the as of a relatively high cell piece of Selecting All Parameters, battery 2.
2)The key step of EIS tests:Start Zview softwares, into impedance interface, 10mV exchange perturbation, 0mV are set
Dc bias and scan frequency be 0.1 Hz -106Hz, after open-circuit voltage is stable, clicks on start and start to test.
3)The EIS obtained according to test, establishes equivalent circuit, the impedance spectrum tested is fitted, obtain equivalent
The component parameters of circuit:Different Charge transfer on interface resistance RrWith electric capacity Cμ, according to formula τn=1/ωr=Rr*CμCalculate the electronics longevity
Order τn, according to formula τn=1/ωr=1/2πfmax, the qualitative analysis Battery pack electron lifetime.
Fit procedure is that crossover rate piecewise analysis test result, high-frequency section use R firsthfAnd ChfFitting in parallel,
Medium/low frequency band, for the EIS with obvious 45 ° of electrical transmission lines, it is fitted using TL equivalence elements.Obtain parameter RrAnd Cμ's
Value is respectively 1036 Ω, 2.14E-06F, utilizes formula τn=1/ωr=Rr*CμThe life-span for obtaining electronics is 2.22E-03s, is utilized
Formula τn=1/ωr=1/2πfmaxAnalyze electron lifetime.
Fig. 4 is the perovskite solar cell test of the embodiment and the Nai Sikuitetu of fitting, Fig. 5 are the embodiment
Perovskite solar cell test and the Bode diagram of fitting.It can be seen that fitting result is preferable, illustrate the measuring method
With reliability.
Analysis for electron lifetime, for the frequency f of mf band peak valuemax, with reference to Fig. 3 and Fig. 5, fmax1It is less than
fmax2, therefore the electron lifetime for analyzing battery 1 is higher than the electron lifetime of battery 2.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, some improvement and deformation can also be made, these are improved and deformation
Also it should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses, it is characterised in that including following step
Suddenly:
1)Select an efficient perovskite solar battery sheet;
2)Start electrochemical workstation, apply certain Dc bias to selected perovskite solar battery sheet, and to shake
Width be 10 mV -20 mV ac voltage signal as disturbing signal, test frequency is 0.1 Hz -106Hz scopes are surveyed
Amount, obtains the perovskite solar battery sheet impedance spectrum;
3)Impedance spectrum is obtained to measurement to be fitted, establish equivalent-circuit model, and obtain equivalent-circuit model using ZView
Component parameters;
4)According to formula τn=1/ωr=Rr*CμElectron lifetime in perovskite solar battery sheet is calculated,
According to formula τn=1/ωr=1/2πfmaxThe changing rule of electron lifetime is analyzed,
Wherein, τnFor electron lifetime, fmaxFor frequency, ω corresponding to baud figure intermediate frequency rate section peakrIt is electronics in finite layer
The constant compound angular frequency of diffusion, itself and fmaxRelation be ωr=2πfmax, RrAnd CμIt is compound that different interface electronics are represented respectively
Resistance and electric capacity, RrAnd CμBy step 3)Fitting obtains, ωrJudged in impedance spectrum according to characteristic peaks.
2. a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses according to claim 1, it is special
Sign is, the step 1)In, select an efficient perovskite solar battery sheet method for:Under the same conditions, prepare
Some perovskite solar battery sheets, the I-V characteristic curve of the perovskite solar battery sheet under certain illumination is tested, is calculated
To photoelectric transformation efficiency, fill factor, curve factor, photoelectric transformation efficiency and fill factor, curve factor highest cell piece are chosen.
3. a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses according to claim 1, it is special
Sign is, the step 2)In, the Dc bias applied is the operating voltage of perovskite solar battery sheet different operating point.
4. a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses according to claim 1, it is special
Sign is, the step 3)Concrete operations it is as follows:
3-1)Press high frequency band, mf band and low-frequency band analysis measurement result first, establish high frequency band using resistance R with
Normal phase element CPE is in parallel, and middle low-frequency band uses the equivalent-circuit model of TL or G elements;
3-2)For electronic component the resistance R, normal phase element CPE and electric capacity C, using ZView softwares in equivalent-circuit model
It is fitted, determines each component parameters, corresponding element is finally increased and decreased according to fitting result and then adjusts equivalent-circuit model,
Optimize.
5. a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses according to claim 4, it is special
Sign is that the high frequency band is 106-103Hz, mf band 103- 10 Hz, low-frequency band 10-0.1Hz.
6. a kind of perovskite solar cell electron lifetime method of testing based on EIS analyses according to claim 1, it is special
Sign is that the changing rule of the electron lifetime is:The characteristic frequency f at crestmaxMoved to high frequency treatment, then τnReduce, work as ripple
Characteristic frequency f at peakmaxMoved to low frequency, then τnIncrease.
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CN108804774A (en) * | 2018-05-22 | 2018-11-13 | 河海大学常州校区 | A method of based on electrochemical impedance spectroscopy test analysis solar cell ideal factor |
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EP3869687A1 (en) * | 2020-02-18 | 2021-08-25 | Siemens Aktiengesellschaft | Predicting a performance value of a solar cell from electrical impedance spectroscopy measurements |
CN113805067A (en) * | 2021-09-28 | 2021-12-17 | 合肥恒钧检测技术有限公司 | System and method for detecting battery pack parameters |
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CN108804774A (en) * | 2018-05-22 | 2018-11-13 | 河海大学常州校区 | A method of based on electrochemical impedance spectroscopy test analysis solar cell ideal factor |
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EP3869687A1 (en) * | 2020-02-18 | 2021-08-25 | Siemens Aktiengesellschaft | Predicting a performance value of a solar cell from electrical impedance spectroscopy measurements |
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CN113805067A (en) * | 2021-09-28 | 2021-12-17 | 合肥恒钧检测技术有限公司 | System and method for detecting battery pack parameters |
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