CN103000701A - Novel solar battery - Google Patents
Novel solar battery Download PDFInfo
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- CN103000701A CN103000701A CN2012105180285A CN201210518028A CN103000701A CN 103000701 A CN103000701 A CN 103000701A CN 2012105180285 A CN2012105180285 A CN 2012105180285A CN 201210518028 A CN201210518028 A CN 201210518028A CN 103000701 A CN103000701 A CN 103000701A
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Abstract
The invention discloses a novel solar battery which is provided with photoelectric conversion layers with different sunlight absorption spectrums and conductor layers which are insulated with the photoelectric conversion layers and connected with a power source. External electric fields are formed on the conductor layers and the photoelectric conversion layers. Under the action of the external electric fields, depletion layers of PN joints inside the photoelectric conversion layers are broadened, and internal electric fields are enhanced, so that the sun photon utilization capacity and the solar energy conversion efficiency are high, and compared with other batteries, the photoelectric conversion efficiency can be improved by more than 10%.
Description
[technical field]
The present invention relates to the field of photovoltaic cell, particularly a kind of novel solar battery.
[background technology]
The electricity conversion of solar cell is also very low.Installation and the cost of electricity-generating of solar cell system are all relatively high at present, and this causes the relative Conventional Power Generation Mode of solar power generation also not have competitiveness.Therefore improve the emphasis that solar battery efficiency is solar energy research always.Present research mainly concentrates on the research and development of new material and the improvement of the systems such as optically focused, plated film.
Usually, only have energy just can form electric current more than or equal to the photon irradiation of ionization energy on photocell, solar energies a large amount of in the normal optical battery are wasted.If making the ionization energy reduction that more electronics will be participated in the photovoltaic effect goes, can improve the efficiency of light energy utilization.But existing solution all can not change photronic ionization energy.
In addition, the electron hole pair with photon excitation of enough energy is not all to participate in the photoelectric current to go, and only has the nearer electron hole pair of distance P N knot to be separated under the effect of internal electric field, forms photoelectric current.
Can the transformation efficiency of photoelectric conversion element be determined by its absorbing state to solar spectrum on the one hand, be changed on the other hand the situation decision of electric energy by the photoelectronic energy that is absorbed.
The present invention namely proposes for above-mentioned Technical Research.
[summary of the invention]
The technical problem to be solved in the present invention provides a kind of novel solar battery, is provided with the photoelectric conversion layer with different sunlight absorption spectras, and conductor layer is connected with power supply simultaneously, can form external electric field at photoelectric conversion layer.Described external electric field is identical with the internal electric field direction, under the effect of external electric field, the depletion layer of the inner PN junction of photoelectric conversion layer will be broadened, internal electric field is enhanced, this novel solar battery can utilize the unserviceable part photon of other existing solar cells on the market, have exclusive superiority, its photoelectric conversion efficiency can improve more than 10% than other.
For solving the problems of the technologies described above, a kind of novel solar battery of the present invention adopts following technical scheme:
A kind of novel solar battery of the present invention comprises some layers of photoelectric conversion layer and some layers of conductor layer, is provided with insulating barrier between described photoelectric conversion layer and the conductor layer, and described conductor layer is connected be used to the power supply that external electric field is provided.
Can form internal electric field on the described photoelectric conversion layer, described internal electric field direction is identical with external electric field direction on the conductor layer.
In the present invention, the material that photoelectric conversion layer adopts can produce photoelectric effect, is and can produces photoelectric any materials.
Photoelectric conversion layer of the present invention is one deck, and described conductor layer is one deck, and described insulating barrier is one deck; Perhaps described photoelectric conversion layer is three layers, and described conductor layer is three layers, and described insulating barrier is five layers, is separated by insulating barrier between described photoelectric conversion layer and the conductor layer.As required, photoelectric conversion layer, conductor layer and insulating barrier can be the random layer number.
Described photoelectric conversion layer is arranged on different positions, has different sunlight absorption spectras.
Conductor layer can be the arbitrary form that can form external electric field among the present invention, such as tabular, and any materials such as dot matrix or latticed conductor, semiconductor or macromolecule.Formed external electric field can be uniformly, also can be any form according to its locus uneven distribution.
A kind of novel solar battery of the present invention, be provided with the photoelectric conversion layer of different sunlight absorption spectras, conductor layer is connected with power supply simultaneously, form external electric field at conductor layer, under the effect of external electric field, the depletion layer of the inner PN junction of photoelectric conversion layer will be broadened, and internal electric field is enhanced, electronics in the more low-yield and greater room that originally can not be utilized can be participated in the photoelectric conversion process, make the photoelectric conversion efficiency of battery higher.On the one hand, under the superposition of external electric field, the right ionization energy of outer-shell electron reduces.Photon with less energy can't not inspire electron hole pair when adding external electric field, but along with making ionization energy, external electric field reduces, some electronics that originally can not inspire electron hole pair can inspire electron hole pair, have an opportunity to participate in the process of opto-electronic conversion and go.
On the other hand, in the photoelectric conversion process, photon irradiation is to semiconductor, and the photon with enough energy can inspire an electron hole pair.But only have the nearer electron hole pair of distance P N knot to be separated by internal electric field, form photoelectric current thereby under the effect of internal electric field, move to the PN junction two ends, finish the process of opto-electronic conversion.Owing to the attraction between the positive and negative charge, meeting is again compound in diffusion for other regional electron hole pairs, and the electron hole pair that these regional photon excitations go out does not participate in the opto-electronic conversion and goes.Under the stack of external electric field, internal electric field has obtained reinforcement, and depletion layer also broadens.
This two aspect is made more photon participate in opto-electronic conversion and goes on so that the electron hole pair in the more vast zone participates in the photoelectric current goes.Thereby improved electricity conversion, its photoelectric conversion efficiency can improve more than 10% than other.
[description of drawings]
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail, wherein:
Fig. 1 is the structural representation of individual layer photoelectric conversion layer of the present invention and single-conductor layer.
Fig. 2 is the structural representation of three layers of photoelectric conversion layer of the present invention and three layers of conductor layer.
[embodiment]
Below in conjunction with accompanying drawing embodiments of the present invention are elaborated.
A kind of novel solar battery of the present invention, on the solar radiation direction, ground floor is photoelectric conversion layer 1, is used for light energy conversion is become electric energy, and discharges by the electrode of photoelectric conversion layer both sides about in the of 1.Described conductor layer 2 is in order to provide external electric field, and conductor layer 2 is positioned over the rear along optical axis of photoelectric conversion layer 1 usually, and internal electric field 5 directions of PN junction are identical with external electric field 6 directions on the conductor layer 2 on the described photoelectric conversion layer 1.Be insulating barrier 3 between photoelectric conversion layer 1 and conductor layer 2, in order to photoelectric conversion layer 1 and conductor layer 2 are separated, an end of power supply 4 links to each other with conductor layer 2 by wire, other end ground connection.
Can add last layer conductor layer 2 at photoelectric conversion layer 1 along the place ahead of optical axis direction, this conductor layer 2 must be transparent material, to guarantee that light can shine photoelectric conversion layer 1 from conductor layer 2, then two-layer conductor layer 2 is connected with power supply 4 the two poles of the earth respectively, make external electric field more even stronger, can promote better the absorption of low light level and the electron hole pair that useful photon excites to participate in the photoelectric current and go.Usually provide the power supply 4 of external electric field 6 to be provided by photocell itself, the further like this solar cell system composition that reduced makes solar cell system simpler, and cost is lower.
The solar cell that Fig. 2 is comprised of a plurality of photoelectric conversion layers 1 and multi-layer conductive layer 2, three layers of conductor layer 2 have been arranged alternately, three layers of photoelectric conversion layer 1 and five layer insulatings 3, the photoelectric conversion layer 1 of diverse location setting has sunlight absorption spectra separately, during sunlight process photoelectric conversion layer 1, energy is greater than E
1The photon of-eV1 is absorbed, and inspiring and discharging an energy behind the electron hole pair is E+eV1-E
1Secondary photon, energy is less than E
1The photon of-eV1 can not be absorbed, and these energy are less than E
1The photon of-eV1 and secondary photon E+eV1-E
1Pass together photoelectric conversion layer 1, continue to propagate.Conductor layer 2 after the photoelectric conversion layer 1 of correspondence and insulating barrier 3 must be transparent, or transparent to the photon that sees through last opto-electronic conversion 1, so that thereafter other layer photoelectric conversion layer 1 can photoelectric effect occur again with these photoelectrons.
Claims (6)
1. novel solar battery, it is characterized in that comprising some layers of photoelectric conversion layer (1) and some layers of conductor layer (2), be provided with insulating barrier (3) between described photoelectric conversion layer (1) and the conductor layer (2), described conductor layer (2) is connected be used to the power supply that external electric field (6) are provided (4).
2. by the described a kind of novel solar battery of claim 1, it is characterized in that can forming internal electric field (5) on the described photoelectric conversion layer (1), described internal electric field (5) direction is identical with external electric field (6) direction on the conductor layer (2).
3. by the described a kind of novel solar battery of claim 1, it is characterized in that the material that described photoelectric conversion layer (1) adopts can produce photoelectric effect.
4. by claim 1 or 2 or 3 described a kind of novel solar batteries, it is characterized in that described photoelectric conversion layer (1) is one deck, described conductor layer (2) is one deck, and described insulating barrier (3) is one deck.
5. by claim 1 or 2 or 3 described a kind of novel solar batteries, it is characterized in that the quantity of described photoelectric conversion layer (1), conductor layer (2) can increase arbitrarily, separated by insulating barrier (3) between described photoelectric conversion layer (1) and the conductor layer (2).
6. by the described a kind of novel solar battery of claim 1, it is characterized in that described photoelectric conversion layer (1) is arranged on different positions along optical axis, has different sunlight absorption spectras.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105180285A CN103000701A (en) | 2012-12-05 | 2012-12-05 | Novel solar battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105180285A CN103000701A (en) | 2012-12-05 | 2012-12-05 | Novel solar battery |
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| CN103000701A true CN103000701A (en) | 2013-03-27 |
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| CN2012105180285A Pending CN103000701A (en) | 2012-12-05 | 2012-12-05 | Novel solar battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103400867A (en) * | 2013-08-06 | 2013-11-20 | 严振华 | Method for improving photoelectric conversion rate of photovoltaic cell |
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| CN102270691A (en) * | 2011-08-11 | 2011-12-07 | 北京泰富新能源科技有限公司 | Thin-film solar cell |
| CN202268357U (en) * | 2011-08-11 | 2012-06-06 | 北京泰富新能源科技有限公司 | Thin film solar cell |
| CN202996854U (en) * | 2012-12-05 | 2013-06-12 | 中山联合光电科技有限公司 | Solar cell |
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2012
- 2012-12-05 CN CN2012105180285A patent/CN103000701A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201081816Y (en) * | 2007-07-24 | 2008-07-02 | 王金忠 | Solar battery |
| CN201185191Y (en) * | 2008-02-01 | 2009-01-21 | 东捷科技股份有限公司 | Silicon-based thin-film solar cell with multiple stacks |
| CN101533866A (en) * | 2008-03-14 | 2009-09-16 | 东捷科技股份有限公司 | Solar battery with amorphous silicon film of multi-structural layer |
| CN101567404A (en) * | 2008-04-24 | 2009-10-28 | 东捷科技股份有限公司 | Multisection silicon-based film solar cell structure and process thereof |
| JP2011034942A (en) * | 2009-08-02 | 2011-02-17 | Michio Takaoka | Secondary battery and solar cell of superposing electric field |
| CN101699632A (en) * | 2009-10-14 | 2010-04-28 | 郭建国 | Film photovoltaic cell with added power supply for providing electric field effect |
| CN102117849A (en) * | 2009-12-31 | 2011-07-06 | 晶元光电股份有限公司 | Solar battery element and device thereof |
| CN102231395A (en) * | 2011-06-17 | 2011-11-02 | 郭建国 | Insulating grating type silicon photovoltaic power supply module |
| CN102255004A (en) * | 2011-08-11 | 2011-11-23 | 北京泰富新能源科技有限公司 | Method for manufacturing thin film solar cell |
| CN102270691A (en) * | 2011-08-11 | 2011-12-07 | 北京泰富新能源科技有限公司 | Thin-film solar cell |
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| CN202996854U (en) * | 2012-12-05 | 2013-06-12 | 中山联合光电科技有限公司 | Solar cell |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103400867A (en) * | 2013-08-06 | 2013-11-20 | 严振华 | Method for improving photoelectric conversion rate of photovoltaic cell |
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Application publication date: 20130327 |