CN201828643U - Direct-current measurement device for measuring quantum efficiency of solar cell - Google Patents
Direct-current measurement device for measuring quantum efficiency of solar cell Download PDFInfo
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- CN201828643U CN201828643U CN2010202383477U CN201020238347U CN201828643U CN 201828643 U CN201828643 U CN 201828643U CN 2010202383477 U CN2010202383477 U CN 2010202383477U CN 201020238347 U CN201020238347 U CN 201020238347U CN 201828643 U CN201828643 U CN 201828643U
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- solar cell
- light intensity
- quantum efficiency
- measured
- intensity detector
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Abstract
The utility model relates to a direct-current measurement device for measuring quantum efficiency of a solar cell, which comprises a light source, a focusing lens, an optical filter, a monochromator, an collimating lens, a beam splitter, a sample holder, a solar cell to be tested, a light intensity detector, a current amplifier and a computer, the solar cell to be tested is arranged on the sample holder, the solar cell to be tested and the light intensity detector are arranged vertically relative to the beam splitter, the light source, a closed compartment, the monochromator, the collimating lens and a sample chamber are connected in sequence, the monochromator and the light intensity detector are electrically connected with the computer, and the solar cell to be tested is electrically connected with the computer when short-circuit current signals generated by the solar cell to be tested are input into the current amplifier. The direct-current measurement device can utilize the same light source to obtain light intensity Pin1 detected by the light intensity detector and short-circuit current Isc generated by the solar cell to be detected, the impact of external environmental factors on testing results is eliminated, the quantum efficiency of the solar cell to be tested can be reflected more objectively, and the accuracy of the testing results is improved.
Description
[technical field]
The utility model relates to the manufacture of solar cells field, especially the proving installation of quantum efficiency of solar battery.
[background technology]
Along with energy crisis and environmental crisis become increasingly conspicuous, preserving the ecological environment is subject to people's attention gradually.At present, accelerate develop and useining regenerative resource such as sun power becomes a consensus of the international community.In recent years, the solar energy power generating industry increases rapidly, and the research and development high performance solar cells has become the most important thing.Weigh the quality of solar cell quality, the index of most critical is a photoelectric transformation efficiency.Obtain the solar cell photoelectric conversion efficiency and just need to measure the quantum efficiency of solar cell under different wave length monochromatic light.The measurement of the quantum efficiency of solar cell is the monochromatic light irradiation solar cell with certain intensity, measure the short-circuit current of solar cell this moment, change monochromatic wavelength then successively, thereby duplicate measurements obtains the short-circuit current under each wavelength again, reflects the photoelectric transformation efficiency of solar cell under different wave length thus.
The quantum efficiency of solar cell is meant solar cell electron-hole pair number that produces and the ratio that is radiated at the photon number of solar cell surface, and it is relevant with the response of each wavelength light that is radiated at solar cell surface.The quantum efficiency of objective sign solar cell is particularly important for the research of solar cell, and it is to weigh one of most important parameter of solar cell photoelectric conversion efficiency.
Because the measurement of quantum efficiency can obtain the wavelength response range of solar cell to sunshine, can distinguish of the contribution of the light of different-waveband to the solar cell short-circuit current, therefore it can help to recognize the quantum yield of solar cell to different wavelengths of light, and the improvement of solar cell properties is had directive function.For solar cell, it is extremely important having best spectral response on the solar spectrum composition distributes stronger spectral position, so the quantum efficiency of solar battery test is very crucial in solar cell material research and solar cell design.
At present, the conventionally test method of quantum efficiency of solar battery has two kinds, and first kind is relative method, and second kind is the step measurement method.
The device that adopts relative method test quantum efficiency of solar battery is as shown in Figure 1: it comprises light source 1, condenser lens 2, optical filter 3, monochromator 4, collimation lens 5, specimen holder 6, standard model 7, solar cell 8 to be measured, current amplifier 9 and computing machine 10, condenser lens 2 and optical filter 3 are arranged in the sealing storehouse 11, specimen holder 6 is installed in the sample chamber 12, standard model 7 is embedded on the specimen holder 6, the short-circuit current of elder generation's measurement standard sample 7 under the monochromatic light illumination condition after monochromator 4 beam split, then, solar cell 8 to be measured is installed on the specimen holder 6, make it to block standard model 7, measure the short-circuit current of solar cell 8 to be measured again, because the quantum efficiency parameter of standard model 7 is known, it is demarcated by the Chinese metering of authoritative measuring mechanism institute, therefore as long as the short-circuit current that will successively obtain compares, just can draw the quantum efficiency of solar cell to be measured.
Adopt the existing instrument of relative method test quantum efficiency of solar battery to have following defective:
1) owing to needs the short-circuit current of priority testing standard sample and solar cell to be measured, and extraneous factor is unsettled in measuring process: environment temperature for example, humidity, parasitic light, noise, earth shock etc., particularly light source power, spectrum stability are not enough, therefore can cause measurement result inaccurate.
2) standard model in use for some time, its quantum efficiency also has drift, need to recalibrate, otherwise, also can cause test result inaccurate.
The existing apparatus that adopts step measurement method test quantum efficiency of solar battery is as shown in Figure 2: comprise light source 1, condenser lens 2, optical filter 3, monochromator 4, collimation lens 5, specimen holder 6, light intensity detector 14, solar cell to be measured 8, current amplifier 9 and computing machine 10, condenser lens 2 and optical filter 3 are arranged in the sealing storehouse 11, specimen holder 6 is installed in the sample chamber 12, light intensity detector 14 is embedded on the specimen holder 6, the light intensity P that uses light intensity detector 14 test monochromators 4 to penetrate under each wavelength earlier
In1, then solar cell 8 to be measured is installed on the specimen holder 6, make it to block light intensity detector 14, measure the short-circuit current I that solar cell 8 to be measured is produced under the illumination of identical wavelength
Sc, then, pass through computing formula:
Obtain the quantum efficiency of solar cell to be measured.
The instability of extraneous factor can cause measurement result inaccurate equally in step measurement method process.
In sum, no matter adopting relative method still is the step measurement method, the instability that all can't eliminate extraneous factor influences measurement accuracy: environment temperature for example, humidity, parasitic light, noise, earth shock etc., particularly the instability of light source power, spectrum all can exert an influence to test result.
In view of the above problems, be necessary to provide a kind of device that can overcome the test quantum efficiency of solar battery of prior art deficiency.
[utility model content]
The purpose of this utility model provides a kind of direct-current measuring device of quantum efficiency of solar battery, and it can utilize with light source beam and obtain the detected light intensity P of light intensity detector simultaneously
In1Short-circuit current I with solar cell generation to be measured
Sc, eliminated the influence that the external environment factor produces test result, quantum efficiency that can more objective reflection tested solar cell has improved precision of test result.
The technical scheme that the utility model is taked is as follows:
The direct-current measuring device of described a kind of quantum efficiency of solar battery, as shown in Figure 3, it comprises light source, condenser lens, optical filter, monochromator, collimation lens, specimen holder, solar cell to be measured, light intensity detector, current amplifier and computing machine, condenser lens and optical filter are arranged in the sealing storehouse, specimen holder, solar cell to be measured and light intensity detector all are arranged in the sample chamber, light source, the sealing storehouse, monochromator, collimation lens is connected successively with the sample chamber, monochromator and current amplifier are electrically connected with computing machine, it is characterized in that: in the sample chamber, also be provided with beam splitter, solar cell to be measured is installed on the specimen holder, and solar cell to be measured and light intensity detector are with respect to the beam splitter vertical distribution, light intensity detector is electrically connected with computing machine, and solar cell to be measured is electrically connected with current amplifier.
Further, the darkroom of described sample chamber for making with light absorbent can shield parasitic light.
Further, described condenser lens is quartzy condenser lens, is provided with electronic temperature control device in specimen holder;
The formula of test quantum efficiency of solar battery is:
In the formula, EQE is the solar cell mono-wavelength quantum efficiency, N
eBe the number of electrons that produces after the illumination; N
pBe incident monochromatic light ray subnumber; I
SCBe the solar cell short-circuit current, the μ A of unit; P
InBe incident monochromatic light power, the μ W of unit; λ
MonoBe the incident monochromatic wavelength, the nm of unit.Hence one can see that, measure solar cell mono-wavelength quantum efficiency EQE, must record solar cell short-circuit current I earlier
ScWith incident monochromatic light power P
In
In the utility model, the opticator that light source, condenser lens, monochromator are formed provides the monochromatic light of certain intensity for measurement; Light path sealing storehouse and sample chamber can shield parasitic light, and the test environment of solar cell is provided; Beam splitter can be divided into two bundles with the light that monochromator penetrates, and is radiated at respectively on the photosurface of solar cell photosurface to be measured and light intensity detector; Current amplifier detects the short-circuit current I of solar cell to be measured
ScBy the measured light intensity P of light intensity detector
In1, can obtain to incide the luminous power P of solar cell surface to be measured again according to the splitting ratio of beam splitter
InComputing machine collection signals collecting, data processing, memory function and instrument are controlled in all over the body; At last, computing machine is handled data according to the quantum efficiency formula, obtains the quantum efficiency of solar cell to be measured.
The utility model lays particular emphasis on the instability of eliminating light source to measuring the influence that quantum efficiency of solar battery brings, use be the DC-method absolute measurement, record the short-circuit current I of solar cell to be measured simultaneously
ScWith incident optical power P
In, can effectively eliminate the influence that the instability of external environment is brought test result; It can be measured various types of solar cells.The utility model is a cover photoelectricity integrated test system, and collection beam split, faint light electro-detection, signal analysis, microcomputer interface are controlled in the measurement mechanism of the quantum efficiency of solar battery of one, and it has high integration, precision, the fast advantage of test speed; The utility model can overcome the technical deficiency in traditional quantum efficiency measuring method, utilize the utility model, the various types of quantum efficiency of solar battery of energy measurement carry out the improvement of battery preparation technique for the researchist, and the research of part battery mechanism has very big directive significance.
[description of drawings]
Fig. 1 is the composition and the connection diagram thereof of relative method used test equipment;
Fig. 2 is the composition and the connection diagram thereof of step measurement method used test equipment;
Fig. 3 is that testing apparatus of the present utility model is formed and connection diagram.
Among the figure: the 1-light source; The 2-condenser lens; The 3-optical filter; The 4-monochromator; The 5-collimation lens; The 6-specimen holder; The 7-standard model; 8-solar cell to be measured; The 9-current amplifier; The 10-computing machine; 11-seals the storehouse; The 12-sample chamber; The 13-beam splitter; The 14-light intensity detector;
Wherein, current amplifier is meant current amplifier.
[embodiment]
Describe embodiment of the present utility model in detail below in conjunction with accompanying drawing:
The direct-current measuring device of described a kind of quantum efficiency of solar battery, as shown in Figure 3, it is by light source 1, condenser lens 2, optical filter 3, monochromator 4, collimation lens 5, beam splitter 13, specimen holder 6, solar cell 8 to be measured, light intensity detector 14, current amplifier 9 and computing machine 10 are formed, described condenser lens 2 is quartzy condenser lens, condenser lens 2 and optical filter 3 are arranged in the sealing storehouse 11, beam splitter 13, specimen holder 6, solar cell 8 to be measured and light intensity detector 14 all are arranged in the sample chamber 12, the darkroom of described sample chamber 12 for making with light absorbent, it can shield parasitic light, solar cell 8 to be measured is installed on the specimen holder 6, in specimen holder 6, be provided with electronic temperature control device, solar cell 8 to be measured and light intensity detector 14 are with respect to beam splitter 13 vertical distribution, light source 1, sealing storehouse 11, monochromator 4, collimation lens 5 is connected successively with sample chamber 12, monochromator 4 and light intensity detector 14 are electrically connected with computing machine 10, and short-circuit current signal input current amplifier 9 backs that solar cell 8 to be measured produces are electrically connected with computing machine 10.
The concrete measuring method of above-mentioned measurement mechanism is as follows:
The first step, the preparation of measurement mechanism installs light source 1, condenser lens 2, optical filter 3, monochromator 4, collimation lens 5, beam splitter 13, specimen holder 6, solar cell to be measured 8, light intensity detector 14, current amplifier 9 and computing machine 10 by series arrangement shown in Figure 3;
In second step, calibration monochromator 4 utilizes mercury lamp spectrum characteristics spectral line calibration monochromator 4, at first calibrates 0 grade, and next calibrates 1 grade: can choose the characteristic spectral line calibration of a mercury wantonly;
The 3rd step, regulate light source 1, line focus lens 2 focus on the entrance slit place of monochromator 4, use light absorbent to make up light path sealing storehouse 11 in the light path that light source 1 arrives between the condenser lens 2 and condenser lens 2 arrives between monochromator 4 entrance slits; Monochromator 4 entrance slit places are provided with polylith optical filter 3, form an optical filter wheel, output wavelength according to monochromator 4 is automaticallyed switch by computing machine 10, be used for eliminating the influence of multiple order spectrum, incident light is after monochromator 4 beam split, exit slit by monochromator 4 penetrates, and enters sample chamber 12 through collimation lens 5 then;
The 4th step, solar cell 8 to be measured is installed on the specimen holder 6, and the both positive and negative polarity of solar cell 8 to be measured is inserted current amplifier 9, specimen holder 6 is positioned in the sample chamber 12, in specimen holder 6, be provided with electronic temperature control device, keep probe temperature to satisfy 25 ± 2 ℃ of requirements;
In the 5th step, in sample chamber 12, the monochromatic light behind the collimation is divided into two bundles through beam splitter 13, and wherein a branch of light impinges perpendicularly on the light intensity detector 14, and the monochromatic light hot spot covers the photosurface of light intensity detector 14, but does not exceed; Another Shu Guang impinges perpendicularly on the photosurface of solar cell 8 to be measured;
In the 6th step, use current amplifier 9 to measure the short-circuit current I of solar cell 8 to be measured
ScUse light intensity detector 14 to survey the light intensity P that incides on these light intensity detector 14 photosurfaces
In1
The 7th goes on foot, and determines the sweep parameter of monochromator 4, comprising: wavelength scanning range, sweep spacing and scanning times, after the setting, scan by computing machine 10 control monochromators 4, and under each wavelength, the short-circuit current I that current amplifier 9 measures
ScThe light intensity P that signal and light intensity detector 14 detect
In1Signal all deposits computing machine 10 in;
The 8th step is according to the 9 detected short-circuit current signal I of current amplifier in the last step
ScBy the measured light intensity P of light intensity detector 14
In1, can obtain to incide the luminous power P on solar cell to be measured 8 surfaces again according to the splitting ratio of beam splitter 13
In, by the quantum formulae of efficiency:
Obtain the quantum efficiency of solar cell in the whole light wave sweep limit.
The utlity model has following characteristics:
1), can eliminate the impact that flashing brings surely, when using current amplifier 9 to measure the short circuit current of solar cell to be measured, use light intensity detector 14 to survey incident monochromatic light power, eliminated the unstability of unstability, especially light source power of external environment factor to the impact of test result;
2), test speed is fast, because test process is short circuit current and the incident monochromatic light power that records simultaneously solar cell to be measured, need between light intensity detector (or standard sample) and solar cell to be measured, not switch, test speed is faster, data can be in real time, pointwise is exported on computers, and are more directly perceived.
3), absolute measurement, short circuit current and the incident monochromatic light power of solar cell is carried out direct absolute measurement, be different from the indirect measurement of existing method of comparison, avoided second order error;
4), applied widely, be applicable to the measurement of various types of quantum efficiency of solar battery;
5), high integration, the utility model is as a Photodetection system, the operation control of instrument, collection, data storage and the processing of signal are finished by computer.
Claims (3)
1. the direct-current measuring device of a quantum efficiency of solar battery, it comprises light source (1), condenser lens (2), optical filter (3), monochromator (4), collimation lens (5), specimen holder (6), solar cell to be measured (8), light intensity detector (14), current amplifier (9) and computing machine (10), condenser lens (2) and optical filter (3) are placed in the sealing storehouse (11), specimen holder (6), solar cell to be measured (8) and light intensity detector (14) all are arranged in the sample chamber (12), light source (1), sealing storehouse (11), monochromator (4), collimation lens (5) is connected successively with sample chamber (12), monochromator (4) and current amplifier (9) are electrically connected with computing machine (10), it is characterized in that: in sample chamber (12), also be provided with beam splitter (13), solar cell to be measured (8) is installed on the specimen holder (6), and solar cell to be measured (8) and light intensity detector (14) are with respect to beam splitter (13) vertical distribution, light intensity detector (14) is electrically connected with computing machine (10), and solar cell to be measured (8) is electrically connected with current amplifier (9).
2. according to the direct-current measuring device of the described a kind of quantum efficiency of solar battery of claim 1, it is characterized in that: described condenser lens (2) is quartzy condenser lens, is provided with electronic temperature control device in specimen holder (6).
3. according to the direct-current measuring device of the described a kind of quantum efficiency of solar battery of claim 1, it is characterized in that: described sample chamber (12) darkroom for making by light absorbent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202383477U CN201828643U (en) | 2010-06-28 | 2010-06-28 | Direct-current measurement device for measuring quantum efficiency of solar cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010202383477U CN201828643U (en) | 2010-06-28 | 2010-06-28 | Direct-current measurement device for measuring quantum efficiency of solar cell |
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| CN201828643U true CN201828643U (en) | 2011-05-11 |
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| CN2010202383477U Expired - Fee Related CN201828643U (en) | 2010-06-28 | 2010-06-28 | Direct-current measurement device for measuring quantum efficiency of solar cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893680A (en) * | 2010-06-28 | 2010-11-24 | 常州亿晶光电科技有限公司 | Direct current measurement device for quantum efficiency of solar cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101893680A (en) * | 2010-06-28 | 2010-11-24 | 常州亿晶光电科技有限公司 | Direct current measurement device for quantum efficiency of solar cell |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20150628 |
|
| EXPY | Termination of patent right or utility model |