CN102194999A - Composite solar battery - Google Patents

Composite solar battery Download PDF

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CN102194999A
CN102194999A CN2011100506359A CN201110050635A CN102194999A CN 102194999 A CN102194999 A CN 102194999A CN 2011100506359 A CN2011100506359 A CN 2011100506359A CN 201110050635 A CN201110050635 A CN 201110050635A CN 102194999 A CN102194999 A CN 102194999A
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dssc
solar battery
composite solar
voltage source
anode
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康晋锋
王琰
范志伟
刘力锋
张天舒
王宝
王旭
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Peking University
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    • 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
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Abstract

The invention discloses a composite solar battery comprising a dye sensitized solar cell and a voltage source, wherein the dye sensitized solar cell is connected with the voltage source in series, the anode of the dye sensitized solar cell is electrically connected with the cathode of the voltage source, the cathode of the dye sensitized solar cell serves as the cathode of the composite solar cell, and the anode of the voltage source serves as the anode of the composite solar cell. The dye sensitized solar cell in the composite solar cell has increased conversion efficiency.

Description

Composite solar battery
Technical field
The present invention relates to solar cell, particularly, relate to the composite solar battery that comprises dye-sensitized cell (DSSC).
Background technology
French scientist Henri Becq μ erel transforms phenomenon in first observed in 1839 to photoelectricity, but but up to the appearance of the semiconductor solar cell of first practicality in 1954, the idea of " conversion of solar energy is become electric energy " just really becomes a reality.In the initial development stage of solar cell, employed material generally is the narrow bandgap semiconductor material that certain absorption is arranged in the visual field, and therefore this solar cell is called semiconductor solar cell again.
Although wide band gap semiconducter itself is caught the non-constant of the ability of sunlight, suitable dyestuff is attached on the semiconductor surface, by means of the strong absorption of dyestuff, can be electric energy also with conversion of solar energy to visible light.This battery is exactly DSSC (DSSC).
1991, the Switzerland scientist
Figure BDA0000048621310000011
Utilize nanometer technology that the photoelectric conversion efficiency among the DSSC is brought up to 7% first Deng the people.From then on, dye sensitized nano crystal salar battery (promptly
Figure BDA0000048621310000012
Battery) is born thereupon and is able to fast development.After this, based on
Figure BDA0000048621310000013
The high-photoelectric transformation efficiency of the novel DSSC of battery has reached 11%.
Yet owing to following reason, the photoelectric conversion efficiency of DSSC is difficult to further raising over past ten years.
At wavelength is that the photoelectric conversion efficiency of thin film solar cell is determined by following formula under the monochromatic light irradiation of λ:
E ff(λ)＝LHE(λ)φ injη c
Wherein LHE (λ) is the sun light intensity that absorbed by the dyestuff ratio with total incident intensity, and it depends primarily on what of absorbing dye quantity in the character of dyestuff and the film; φ InjBe quantum efficiency, promptly the excitation electron of dyestuff is injected into the probability on the oxide conduction band; And η cBe collection efficiency, just the electronics in conduction band arrives the probability of positive electrode by oxide-film.η cBe subjected to the influence of dark reaction to a great extent, dark reaction is strong more, η cJust more little.
So-called " dark reaction " is exactly the compound of electronics.Dark reaction comprises two processes: on the one hand, in the solar cell working process, since be subjected to electrolyte intermediate ion oxidation/reduction reaction speed restriction, photoelectron/hole-recombination process takes place and generates the ground state dyestuff in the process that collector transports separately in light induced electron that produces after dyestuff is subjected to optical excitation and hole; On the other hand, be transported to nano-TiO at light induced electron through electrolyte as anode 2In the process on the film, a part of light induced electron can with the oxidation state electrolyte (for example,
Figure BDA0000048621310000021
) reduction reaction takes place and generate to go back ortho states electrolyte (for example, I -).The dark reaction process is to cause the main cause of the loss of light induced electron, and the result has reduced the photoelectric conversion efficiency of DSSC.
For a long time, scientists is all over the world being carried out various effort for suppressing dark reaction.For example develop various membrane structures, improve the life-span of electronics, improve the transmission rate of electronics in film, perhaps improve for various dyestuffs, reducing the compound of electronics, but effect but is not very desirable.
Summary of the invention
The composite solar battery that the purpose of this invention is to provide a kind of raising dye-sensitized cell (DSSC) conversion efficiency.
For achieving the above object, the invention provides a kind of composite solar battery, the DSSC and the voltage source that comprise series connection, the anode of this DSSC is connected with the negative electricity of voltage source, and the negative electrode of DSSC is as the negative electrode of composite solar battery, and the positive pole of voltage source is as the anode of composite solar battery.
Preferably, described voltage source is dry cell or storage battery.
Preferably, the anode of described DSSC is the Pt layer.
Preferably, the negative electrode of described DSSC is an oxide semiconductor layer.
Preferably, described oxide semiconductor layer is TiO 2Layer.
With respect to traditional electrode structure, method of the present invention has following beneficial effect: because voltage source applies bias voltage to DSSC, the anode (being the Pt layer) of DSSC locate to have strengthened effectively reduction reaction (
Figure BDA0000048621310000022
To I -Transform), make lose the dyestuff that electronics is in excitation state can very fast and I -Compound, and then the photoelectron that produces is very difficult compound with the dyestuff of excitation state again, this has suppressed the generation of dark reaction effectively.And this bias voltage has improved the electric field strength in the DSSC, has accelerated electronic motion, has quickened the transmission speed of electronics, has reduced the recombination probability of electronics, and this has further suppressed the generation of dark reaction effectively.
The power output of this composite solar battery is higher than the conventional DSSC of independent use and the power output sum of the independent voltage source that uses, and wherein the DSSC in this composite solar battery has the conversion efficiency of raising.
Description of drawings
Fig. 1 shows the schematic structure according to composite solar battery of the present invention, and this composite solar battery comprises the DSSC and the applied voltage source of series connection.
Fig. 2 shows an example according to composite solar battery of the present invention, and this composite solar battery comprises the DSSC and the dry cell of series connection.
Fig. 3 a is at the measured I-V curve of the DSSC of routine.
Fig. 3 b is at the measured I-V curve of the DSSC in the composite solar battery according to the present invention.
Embodiment
Describe embodiments of the invention below in detail, wherein in institute's drawings attached, adopt identical or similar label to represent identical or similar elements.These embodiment are exemplary, only are used to explain the present invention, and can not be interpreted as limitation of the present invention.
Fig. 1 shows the schematic structure according to composite solar battery of the present invention, and this composite solar battery comprises the DSSC 100 and the applied voltage source 200 of series connection.DSSC 100 has conventional structure, and cathode assembly, anode assemblies and the confined space that provides between cathode assembly and anode assemblies are provided.
Anode assemblies comprises glass substrate 11, is positioned at including transparent conducting oxide layer 12 (TCO, for example SnO on the glass substrate 2Base film, In 2O 3Base film, zno-based film or compound TCO film) and be positioned at platinum layer 13 (Pt) on the tco layer 12, cathode assembly comprises substrate of glass 21, be positioned at the tco layer 22 on the substrate of glass 21 and be positioned at oxide semiconductor layer 23 on the tco layer 22 (TiO for example 2Layer).
The Pt layer 13 of anode assemblies is relative with the oxide semiconductor layer 23 of cathode assembly, and holds electrolyte 31 (for example electrolyte solution or solid electrolyte) in the confined space between the oxide semiconductor layer 23 of the Pt of anode assemblies layer 13 and cathode assembly.In electrolyte 31, be mixed with nano-oxide particles 32 (TiO for example 2Particle), absorbing dye 33 and on the surface of nano-oxide particles 32.
Can on market, buy and comprise glass substrate 11,21 and the position electro-conductive glass of including transparent conducting oxide layer 12,22 thereon, FTO (mixing the tin oxide of fluorine (the F)) electro-conductive glass that for example Japanese Nippon Sheet Glass company produces.Can on market, buy nano-oxide particles 32, the commercial TiO that for example German Degussa company produces 2The P25 particle.Can on market, buy dyestuff 33, for example the N3 dyestuff of DaLian, China seven-colour-light company production.
And the common process that forms DSSC 100 is known, for example comprises: after electro-conductive glass being carried out ultrasonic cleaning and oven dry, by sputtering at deposit Pt layer 13 and oxide semiconductor layer 23 on the electro-conductive glass; Then cathode assembly and the anode assemblies that obtains fitted together, for example adopt the sealant (not shown) to seal and form confined space; In confined space, inject the mixture of electrolyte 31 and nano-oxide particles 32 (on its surface absorbing dye 33) then.
Composite solar battery according to the present invention comprises the DSSC 100 and the applied voltage source 200 of series connection, and the anode of DSSC 100 be connected with the negative pole of voltage source 200 (, referring to that here the Pt layer 13 in the anode assemblies is connected with the negative electricity of voltage source 200) although not shown in the drawings.The negative electrode of DSSC100 is as the negative electrode of composite solar battery, and the positive pole of this voltage source 200 is as the anode of composite solar battery.
With this composite solar battery and load (for example storage battery or power consumption equipment) when being connected, the DSSC 100 and the voltage source 200 of this composite solar battery power to the load simultaneously.When work, voltage source 200 applies the bias voltage of identical polar to DSSC.
Fig. 2 shows an example according to composite solar battery of the present invention, and this composite solar battery comprises the DSSC 100 and the dry cell 200 ' of series connection.Dry cell 200 ' for example can adopt the family expenses 1.5V dry cell of buying on market, record its internal resistance by universal instrument and be about 2 Ω.
With the DSSC 100 for preparing according to the method described above (oxide semiconductor layer 23 (TiO for example 2Layer) area is 5mm*5mm) and dry cell 200 ' series connection, composite solar battery as shown in Figure 2 formed.The 2400 type digital source tables that adopt U.S. Keithley Instrument Inc. to produce are measured the I-V curve of this composite solar battery.
Fig. 3 a is at the measured I-V curve of the DSSC of routine.Fig. 3 b is at the measured I-V curve of the DSSC in the composite solar battery according to the present invention.
The voltage of DSSC 100 is V DSSC=V-V 0, wherein V is the output voltage of composite solar battery, V 0It is the bias voltage of dry cell 200 '.In addition, because configured in series, the output current I of composite solar battery equals the output current I of DSSC 100 DSSCAccording to this relation, can go out the I-V curve of the DSSC 100 the composite solar battery from the I-V curve plotting of composite solar battery.
The measurement result of Fig. 3 a and 3b shows that the DSSC 100 in the composite solar battery compares the collection efficiency η of DSSC 100 with the conventional DSSC 100 of independent use cSignificantly improve (from η c=6.5% brings up to η c=8.6%.)。The collection efficiency η of DSSC cCan be according to the I-V curve calculation: get on the I-V characteristic curve that records a bit, this point need satisfy in the points all on curve, the product maximum of its horizontal ordinate, i.e. the power maximum that provides of DSSC (power of DSSC is that the electric current of the some correspondence on the curve multiply by corresponding voltage).The power P of this gained DSSCThe power P that is provided with light source PowerRatio, be the collection efficiency of DSSC, also be η c=P DSSC/ P Power
Be appreciated that, under the mode of operation that this composite solar battery powers to the load, voltage source 200 has been strengthened the electronics of the anode of DSSC 100 is injected, promoted carrying out in the anode place of DSSC 100 reduction reaction, thereby suppressed the dark reaction of DSSC 100 inside, effectively improved the photoelectric conversion efficiency of DSSC 100.The power output of this composite solar battery is higher than the power output sum of the conventional DSSC 100 and the independent voltage source 200 that uses of independent use.

Claims (5)

1. composite solar battery, the DSSC and the voltage source that comprise series connection, the anode of this DSSC is connected with the negative electricity of voltage source, and the negative electrode of DSSC is as the negative electrode of composite solar battery, and the positive pole of voltage source is as the anode of composite solar battery.
2. composite solar battery according to claim 1, wherein said voltage source are dry cell or storage battery.
3. composite solar battery according to claim 1, the anode of wherein said DSSC are the Pt layer.
4. composite solar battery according to claim 1, the negative electrode of wherein said DSSC are oxide semiconductor layer.
5. composite solar battery according to claim 4, wherein said oxide semiconductor layer are TiO 2Layer.
CN2011100506359A 2010-03-10 2011-03-02 Composite solar battery Pending CN102194999A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104091692A (en) * 2014-05-30 2014-10-08 上海北京大学微电子研究院 Solar cell with high conversion efficiency and preparation method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2200253Y (en) * 1994-08-05 1995-06-07 黄国荣 Generator by use of solar energy
CN201081816Y (en) * 2007-07-24 2008-07-02 王金忠 Solar battery
CN101241940A (en) * 2006-12-22 2008-08-13 索尼德国有限责任公司 A photovoltaic cell
CN101268598A (en) * 2004-10-14 2008-09-17 泰德里斯解决方案私人有限公司 Apparatus and method for charging an accumulator
JP2009135395A (en) * 2007-10-30 2009-06-18 Kyocera Corp Photoelectric conversion device, photovoltaic generator, and photoelectric conversion module
CN101510470A (en) * 2008-12-26 2009-08-19 上海拓引数码技术有限公司 Laminated structure of amorphous silicon solar battery and dye sensitization battery
CN101510568A (en) * 2009-03-16 2009-08-19 江苏双登集团有限公司 Amorphous silicon/dye-sensitized laminated thin film solar cell and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2200253Y (en) * 1994-08-05 1995-06-07 黄国荣 Generator by use of solar energy
CN101268598A (en) * 2004-10-14 2008-09-17 泰德里斯解决方案私人有限公司 Apparatus and method for charging an accumulator
CN101241940A (en) * 2006-12-22 2008-08-13 索尼德国有限责任公司 A photovoltaic cell
CN201081816Y (en) * 2007-07-24 2008-07-02 王金忠 Solar battery
JP2009135395A (en) * 2007-10-30 2009-06-18 Kyocera Corp Photoelectric conversion device, photovoltaic generator, and photoelectric conversion module
CN101510470A (en) * 2008-12-26 2009-08-19 上海拓引数码技术有限公司 Laminated structure of amorphous silicon solar battery and dye sensitization battery
CN101510568A (en) * 2009-03-16 2009-08-19 江苏双登集团有限公司 Amorphous silicon/dye-sensitized laminated thin film solar cell and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104091692A (en) * 2014-05-30 2014-10-08 上海北京大学微电子研究院 Solar cell with high conversion efficiency and preparation method thereof

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Application publication date: 20110921