CN1216284C - Test method for polycrystalline silicon solar battery converting efficiency - Google Patents
Test method for polycrystalline silicon solar battery converting efficiency Download PDFInfo
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- CN1216284C CN1216284C CN 03114762 CN03114762A CN1216284C CN 1216284 C CN1216284 C CN 1216284C CN 03114762 CN03114762 CN 03114762 CN 03114762 A CN03114762 A CN 03114762A CN 1216284 C CN1216284 C CN 1216284C
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- solar cell
- conversion efficiency
- polycrystalline silicon
- polysilicon solar
- silicon solar
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Abstract
The present invention relates to a test method for the conversion efficiency of polycrystalline silicon solar cells, which belongs to the application field of semiconductor materials. The present invention has the method: the transmitted spectrum of the polycrystalline silicon solar cells in a waveband range from infrared to visible light is measured; a theoretical transmissivity formula is fitted into an experimental result, and physical parameters, such as the tape trailer energy of the polycrystalline silicon solar cells, etc., are obtained; the conversion efficiency eta of the polycrystalline silicon solar cells is measured by an experiment and is combined with the tape trailer energy EU of different polycrystalline silicon solar cell samples, and a linear relation between the conversion efficiency eta and the tape trailer energy EU is obtained; the present invention can directly obtain the conversion efficiency of the polycrystalline silicon solar cells under the condition of relieving a manufactured measuring lead wire and can also obtain the reliable micro-parameter of the polycrystalline silicon solar cells to be used for guiding technological improvement. Therefore, the present invention has the characteristics of simplicity, convenience, high accuracy and strong practicability.
Description
Technical field
What the present invention relates to is a kind of method of testing of conversion efficiency of solar cell, and particularly a kind of method of testing of the polysilicon solar cell conversion efficiency based on transmitted spectrum belongs to the semiconductor material application.
Background technology
In the transfer of world energy sources, solar cell power generation is in outstanding position.2 of must accomplish of the widespread use of solar photovoltaic generation system are: 1, improve the transformation efficiency of solar cell itself, therefore to test the conversion efficiency of solar cell itself be a research field that merits attention in research; 2, reduce the manufacturing cost of solar cell, the researcher in this field has pointed out to utilize the lower polysilicon semiconductor of quality in conjunction with rapid thermal treatment and simplify the screen brush processing procedure of prining and can reduce the production cost of solar cell greatly.Therefore the method for testing of studying the polysilicon solar cell conversion efficiency is that very great Practical significance is arranged.The key that the researchist points out to improve the conversion efficiency of polysilicon solar cell simultaneously is how to use preferably that technology extracts defective from material, therefore for polysilicon solar cell, if can in its conversion efficiency of test, obtain the micro-parameter of relevant these defectives, as crystal boundary place boundary defect concentration, interface charge density etc., thereby will help very much its conversion efficiency of the more effective raising of improvement of manufacture craft.
Usually the electrical property of measuring solar cell can be summed up as the volt-ampere characteristic of measuring it, because volt-ampere characteristic is relevant with test condition, therefore must under unified specified standard test condition, measure, or the result is converted to the electrical property that could determine solar cell under the standard test condition.97 pages of-149 pages of method of testings of having described a kind of conversion efficiency of solar cell of " solar power generation " that New Age Press, Beijing publishes in Dec, 1987 (the clear grade of high bridge write), ground with the solar cell standard test condition is: built-up radiation is the standard sunlight spectrum of AM1.5, the standard testing temperature is 25 ℃ ± 2 ℃, under this standard test condition, the single solar cell parameter that can measure mainly contains: open-circuit voltage, short-circuit current, optimum operating voltage, recommended current, peak power output, fill factor, curve factor, photoelectric transformation efficiency, series resistors inside, macroscopical parameter such as inner parallel resistance.It is to be noted, resulting peak power output of this method of testing and optimum operating voltage, recommended current choose and the length of Measuring Time relevant, therefore the electricity conversion that obtains has certain uncertainty, need to make special contact conductor simultaneously, and can only obtain such as electric current, bulk parameters such as voltage, can not obtain the micro-parameter of solar cell itself, as the magnetic tape trailer energy, boundary defect concentration, interface charge density, parameters such as coherent length, but the latter has direct directive significance for improving technology with the conversion efficiency that improves solar cell.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of method of testing of polysilicon solar cell conversion efficiency is provided, make its method of testing more simple, accuracy is higher, provides information more comprehensively.
The present invention is achieved by the following technical solutions, and method of testing of the present invention comprises the steps:
1. measure polysilicon solar cell at infrared transmitted spectrum to the visible light wave range scope;
2. with theoretical transmissivity formula fitting experimental result, obtain the magnetic tape trailer energy of polysilicon solar cell, physical parameters such as crystal particle crystal boundary boundary defect concentration, interface charge density and coherent length;
3. the efficiency eta of experiment measuring polysilicon solar cell, and with itself and different polysilicon solar cell sample magnetic tape trailer ENERGY E
UIn conjunction with, obtain linear relation between the two;
4. for other polysilicon solar cells, repeating step 1 and step 2, and with the magnetic tape trailer energy value E that obtains in the step 2
UThe magnetic tape trailer ENERGY E that obtains in the substitution step 3
UWith the relational expression of conversion efficiency of solar cell η, can directly obtain its efficiency eta.
The wave band that step 1 is measured is 6000cm
-1～12000cm
-1Light is derived the computing formula T of polysilicon solar cell transmissivity in normal incidence and exist under the situation of positive and negative two boundary reflections in the step 2, with formula T experimental result is carried out match by computing machine, obtains comprising the magnetic tape trailer ENERGY E
U, boundary defect concentration, interface charge density, coherent length is in interior physical parameter.Between the two linear relation is in the step 3: η/%=-0.202E
U/ meV+28.80 ± 0.05.
The present invention has substantive distinguishing features and marked improvement, the present invention can remove the conversion efficiency that directly obtains polysilicon solar cell under the situation of making measuring lead wire from, the micro-parameter that can also obtain reliable polysilicon solar cell has simple, convenient, high, the practical characteristics of accuracy in order to instruct the improvement of technology.
Embodiment
The Fourier infrared spectrograph that adopts U.S. Buddhist nun high-tensile strength company to produce is measured the polysilicon sample at infrared normal temperature transmitted spectrum to the visible light wave range scope.Three solar cell samples that test is made with the P type polysilicon chip of three different places of production and distinct methods preparation: sample S1, adopt casting to decide the method preparation; Sample S2 adopts the directional solidification method preparation; Sample S3 adopts casting to decide the method preparation.Adopted following technology that polysilicon chip is made solar cell: earlier with acid solution corrosion and texture silicon chip surface, again through POCl
3Diffusion back makes electrode with screen printing technique, in passivated surface and the body and reduce the reflection of incident light on the polysilicon solar cell surface, strengthens chemical vapour deposition technique (PECVD) at its surface deposition SiN with the particle beams at last
xFilm.Test is carried out under the following conditions: light source is the X-25 of a U.S. spectrographic laboratory solar simulator, spectrum AM1.5, light intensity 100mW/cm
225 ± 2 ℃ of probe temperatures; Standard cell adopts national solar cell combined calibrating sheet numbering: new-25, and short-circuit current 108mA.
Method of testing of the present invention specifically comprises the steps:
1, measure the transmitted spectrum of three polysilicon solar cell samples (S1, S2, S3) with Fourier infrared spectrograph in the mode of vertical incidence, the measurement wave band is 6000cm
-1～12000cm
-1
2, absorb based on the Urbach magnetic tape trailer and theory that the polysilicon intrinsic absorbs, consider that light is in normal incidence and exist under the situation of positive and negative two boundary reflections, derive the computing formula T of polysilicon solar cell transmissivity, with formula T experimental result is carried out match by computing machine, obtain the magnetic tape trailer ENERGY E of polysilicon solar cell
U(S1:E
U=78meV, S2:E
V=80meV, S3:E
U=91meV), physical parameters such as crystal particle crystal boundary boundary defect concentration, interface charge density and coherent length.
3, the efficiency eta of these samples of experiment measuring (S1: η=13.1%, S2: η=12.6%, S3: η=10.3%), and with step 2 in the magnetic tape trailer ENERGY E that obtains
UCombine, obtain E
UAnd the linear relation between the η: η/%=-0.202E
U/ meV+28.80 ± 0.05 (300K).There is not magnetic tape trailer energy (E in polysilicon solar cell
U=0) under the ideal state, its desirable conversion efficiency is 28.9% (300K), and is very approaching with extrapolate from the linear relation theoretical value 28.8% (300K) that obtains of the present invention.
4. for other polysilicon solar cells, repeating step 1 and step 2, and with the magnetic tape trailer energy value E that obtains in the step 2
UThe magnetic tape trailer ENERGY E that obtains in the substitution step 3
UWith the linear relation of conversion efficiency of solar cell η, can directly obtain its efficiency eta.
Claims (4)
1. the method for testing of a polysilicon solar cell conversion efficiency is characterized in that, comprises the steps:
1) measures polysilicon solar cell at infrared transmitted spectrum to the visible light wave range scope;
2), obtain the magnetic tape trailer energy of polysilicon solar cell, crystal particle crystal boundary boundary defect concentration, interface charge density and coherent length physical parameter with theoretical transmissivity formula fitting experimental result;
3) efficiency eta of experiment measuring polysilicon solar cell, and with itself and different polysilicon solar cell sample magnetic tape trailer ENERGY E
UIn conjunction with, obtain linear relation between the two;
4) for other polysilicon solar cells, repeating step 1 and step 2, and with the magnetic tape trailer energy value E that obtains in the step 2
UThe magnetic tape trailer ENERGY E that obtains in the substitution step 3
UWith the relational expression of conversion efficiency of solar cell η, can directly obtain its efficiency eta.
2. the method for testing of this polysilicon solar cell conversion efficiency according to claim 1 is characterized in that, the wave band that step 1 is measured is 6000cm
-1～12000cm
-1
3. the method for testing of this polysilicon solar cell conversion efficiency according to claim 1, it is characterized in that, light is in normal incidence and exist under the situation of positive and negative two boundary reflections in the step 2, derive the computing formula T of polysilicon solar cell transmissivity, with formula T experimental result is carried out match by computing machine, obtain comprising the magnetic tape trailer ENERGY E
U, boundary defect concentration, interface charge density, coherent length is in interior physical parameter.
4. the method for testing of this polysilicon solar cell conversion efficiency according to claim 1 is characterized in that, between the two linear relation is in the step 3: η/%=-0.202E
U/ meV+28.80 ± 0.05.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114762 CN1216284C (en) | 2003-01-07 | 2003-01-07 | Test method for polycrystalline silicon solar battery converting efficiency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03114762 CN1216284C (en) | 2003-01-07 | 2003-01-07 | Test method for polycrystalline silicon solar battery converting efficiency |
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|---|---|
| CN1424573A CN1424573A (en) | 2003-06-18 |
| CN1216284C true CN1216284C (en) | 2005-08-24 |
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|---|---|---|---|
| CN 03114762 Expired - Fee Related CN1216284C (en) | 2003-01-07 | 2003-01-07 | Test method for polycrystalline silicon solar battery converting efficiency |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100414287C (en) * | 2004-03-25 | 2008-08-27 | 上海交通大学 | Parameter goodness method for integral indirect gaped semiconducter material |
| CN101299054B (en) * | 2008-05-23 | 2010-12-08 | 南京大学 | Measuring method of dye sensitization nano-film solar cell I-V characteristic and conversion efficiency characteristic |
| DE102009039399A1 (en) * | 2009-08-31 | 2011-03-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method for measuring a semiconductor structure, which is a solar cell or a precursor of a solar cell |
-
2003
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| CN1424573A (en) | 2003-06-18 |
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: HAREON SOLAR TECHNOLOGY Co.,Ltd. Assignor: Shanghai Jiao Tong University Contract fulfillment period: 2009.4.6 to 2014.4.6 Contract record no.: 2009320000563 Denomination of invention: Test method for polycrystalline silicon solar battery converting efficiency Granted publication date: 20050824 License type: Exclusive license Record date: 20090409 |
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Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2009.4.6 TO 2014.4.6; CHANGE OF CONTRACT Name of requester: HAIRUN PHOTOVOLTAIC TECHNOLOGY CO., LTD. Effective date: 20090409 |
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Assignee: HAREON SOLAR TECHNOLOGY Co.,Ltd. Assignor: Shanghai Jiao Tong University Contract record no.: 2009320000563 Date of cancellation: 20120201 |
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Assignee: HAREON SOLAR TECHNOLOGY Co.,Ltd. Assignor: Shanghai Jiao Tong University Contract record no.: 2012320000185 Denomination of invention: Test method for polycrystalline silicon solar battery converting efficiency Granted publication date: 20050824 License type: Exclusive License Open date: 20030618 Record date: 20120308 |
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