CN102280254A - Gel electrolyte with light modulation function for nanocrystalline solar cell - Google Patents
Gel electrolyte with light modulation function for nanocrystalline solar cell Download PDFInfo
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- CN102280254A CN102280254A CN 201110090836 CN201110090836A CN102280254A CN 102280254 A CN102280254 A CN 102280254A CN 201110090836 CN201110090836 CN 201110090836 CN 201110090836 A CN201110090836 A CN 201110090836A CN 102280254 A CN102280254 A CN 102280254A
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Abstract
The invention relates to a gel electrolyte with a light modulation function, in particular to a gel electrolyte which has the light modulation function and is used for a nanocrystalline solar cell. The gel electrolyte with the light modulation function is prepared by adding a proper quantity of fluorescent dyes into the conventional gel electrolyte, and comprises the following components in percentage by mass: 0.0005 to 0.0035 percent of fluorescent dyes, 80.7280 to 80.7250 percent of liquid electrolyte and 19.2715 percent of polyoxyethylene. Photons of which the energy is not matched in a solar spectrum are subjected to frequency modulation under the conversion action of the fluorescent dyes, so that the gel electrolyte can be more easily absorbed by an ordinary solar cell dye with higher photoelectric conversion efficiency, and the photoelectric conversion efficiency of the nanocrystalline solar cell is between 4.02 and 6.88 percent.
Description
Technical field
The present invention relates to a kind of light modulation functional gel electrolyte, especially for the light modulation functional gel electrolyte of nano-crystalline solar battery.
Background technology
New forms of energy are one of five big technical fields of tool decision power in the 21 century development of world economy.Solar energy is a kind of cleaning, the efficiently and never depleted energy, and research and utilization solar energy is the most real concerning the mankind.1991, Lausanne, SUI engineering college
Teach and on " Nature ", delivered about nano-crystalline solar battery (Dye Sensitized Solar Cell, be called for short DSSC) obtain article with lower cost greater than 7% photoelectric conversion efficiency, this utilization for solar energy provides a new approach.The great advantage of this battery be its cost have only the traditional silicon solar cell 1/10, by improvement to dye sensitizing agent, with a kind of black dye dyestuff that is called, make the total photoelectric conversion efficiency of this battery near the conversion efficiency of polysilicon solar cell.
The electrolyte of nano-crystalline solar battery employing at present generally includes three kinds: liquid electrolyte, gel electrolyte and solid electrolyte.Liquid electrolyte adopts is high-volatile organic solution such as acetonitrile, if encapsulate improperly, electrolytical long-time stability can occur to descend, and causes shorten the useful life of battery.For fear of the above problem of liquid electrolyte, people begin to be devoted to the research of solid electrolytes such as organic hole transferring material, ionic conductive polymer, P type semiconductor.These solid-state electrolyte have well solved the problem in useful life of general liquid electrolyte poor stability and battery, but because solid electrolyte and TiO
2The interfacial combined function of light anode is relatively poor, and conductivity is low, has limited the photoelectric conversion efficiency of battery.
Gel electrolyte both can keep definite shape as solid electrolyte, and easy-to-leak liquid has not been eliminated the electrochemical reaction in the lithium liquid electrolyte, and hot property makes moderate progress, and the stability and the fail safe of battery get a promotion.And gel electrolyte has higher conductivity as liquid electrolyte, but existing gel electrolyte composition is comparatively single, the function that only possesses electrical conductivity, in using for nano-crystalline solar battery, limited that sensitizing dyestuff causes the cell photoelectric conversion efficiency not high to the luminous energy absorbability in the solar cell.
Summary of the invention
The objective of the invention is to, by changing the component of existing gel electrolyte, add fluorescent dye, obtain having light modulation functional gel electrolyte, its technical solution is:
A kind of light modulation functional gel electrolyte that is used for nano-crystalline solar battery, described gel electrolyte each component is respectively according to mass percent:
Fluorescent dye 0.0005%-0.0035%
Liquid electrolyte 80.7280%-80.7250%
Polyethylene glycol oxide 19.2715%.
Described fluorescent dye is fluorescein 8G or Eu (tta)
3A kind of among the L.
Described liquid electrolyte is the acetonitrile solution that contains iodine and lithium iodide, and wherein the molar concentration rate of iodine and lithium iodide is 0.03: 0.3.
Owing to adopted above technical scheme, the invention has the advantages that,
The quality of sensitizing dyestuff performance is the key factor that directly determines photronic photoelectric conversion efficiency in the battery, desirable dyestuff must be that sunlight is had good absorption characteristic, can absorb most or all of incident lights, its absorption spectrum and solar spectrum mate well.But often be difficult to find desirable dyestuff in the reality, therefore select for use suitable absorption visible-range fluorescent dye wideer, that absorption coefficient is bigger to carry out sensitization, can reach the purpose that improves the cell photoelectric performance.
The adding of fluorescent dye is carried out frequency (being wavelength) modulation to the unmatched photon of energy in the solar spectrum, and it is absorbed easilier by sensitizing dyestuff, thereby improves the photoelectric conversion efficiency of nano-crystalline solar battery.The basic principle of photonic modulation: molecule can absorb certain energy, make electronics in the molecule higher excitation state from the ground state transition to the energy, when molecule get back to ground state or by senior excitation state to rudimentary excitation state, the process of launching a photon simultaneously is called radiation transistion.Because light wavelength is by the decision of the energy of photon, molecule is by absorbing the photon that goes out less energy than the macro-energy photon radiation, promptly can finish the conversion of light from short wavelength to long wavelength, from but sensitizing dyestuff absorbs more photon, reach the purpose that improves the cell photoelectric conversion efficiency.
The extinction wave spectrum scope of fluorescein 8G is mainly from 400 to 500nm visible region, the absorbing wavelength of saying N3 dyestuff and the yellow 8G of dye fluorescence from absorption spectrum is just in time complementary, there is not the problem of vying each other in the light of the non-absorbent that part of wavelength of fluorescein 8G absorption of N 3 dyestuffs.The wavelength of transmitted light scope of fluorescein 8G is from 460 to 560nm, and maximum emission wavelength is about 520nm.And this just in time with the wave-length coverage coupling of the absorption maximum of N3.Therefore fluorescein 8G neither absorbs sunlight with the competition of N3 dyestuff, can launch the needed photon of N3 dyestuff again, can play the absorption that increases the N3 dyestuff and not produce the photonic modulation effect that absorbs competition again.
Eu (tta)
3The extinction wave spectrum scope of L is mainly from 300 to 450nm visible region, and is just in time complementary from the mediate a settlement absorbing wavelength of dyestuff N3 of absorption spectrum.Dyestuff Eu (tta)
3The wavelength of transmitted light scope of L is from 550 to 650nm, and maximum emission wavelength is about 620nm.And this just in time with the wave-length coverage coupling of the absorption maximum of N3.Therefore from the angle of spectrum analysis, Eu (tta)
3L neither absorbs sunlight with the competition of N3 dyestuff, can launch the needed photon of N3 dyestuff again, can play the absorption that increases the N3 dyestuff and not produce the photonic modulation effect that absorbs competition again.
By the fluorescent dye transformation, the unmatched photon of energy in the solar spectrum is carried out frequency modulation(FM), the solar cell dyestuff that makes its easier quilt have the high light photoelectric transformation efficiency usually absorbs, thereby makes the photoelectric conversion efficiency of nano-crystalline solar battery reach 4.02-6.88%.
Description of drawings
Fig. 1 is the voltage-to-current densogram of the embodiment of the invention 1 nano-crystalline solar battery;
Fig. 2 is the voltage-to-current densogram of the embodiment of the invention 2 nano-crystalline solar batteries;
Fig. 3 is the voltage-to-current densogram of the embodiment of the invention 3 nano-crystalline solar batteries;
Fig. 4 is the voltage-to-current densogram of the embodiment of the invention 4 nano-crystalline solar batteries;
Fig. 5 is the voltage-to-current densogram of the embodiment of the invention 5 nano-crystalline solar batteries;
Fig. 6 is the voltage-to-current densogram of the embodiment of the invention 6 nano-crystalline solar batteries;
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
A kind of light modulation functional gel electrolyte that is used for nano-crystalline solar battery, light modulation functional gel electrolyte of the present invention is that employing an amount of fluorescent dye of adding in existing gel electrolyte realizes that the gel electrolyte each component is respectively according to mass percent:
Fluorescent dye 0.0005%-0.0035%;
Liquid electrolyte 80.7280%-80.7250%;
Polyethylene glycol oxide 19.2715%;
Described fluorescent dye is fluorescein 8G or Eu (tta)
3A kind of among the L.
Described liquid electrolyte is the acetonitrile solution that contains iodine and lithium iodide, and wherein the molar concentration rate of iodine and lithium iodide is 0.03: 0.3.
Wherein, the structural formula of fluorescein 8G:
Eu (tta)
3L is with reference to from document Angew.Chem.2004, and 43,5009-5013, article name are A HighlyLuminescent Europium Complex Showing Visible-Light-Sensitized RedEmission, its structural formula is:
This preparation method who is used for the gel electrolyte of nano-crystalline solar battery is fluorescent dye to be dissolved in liquid electrolyte, formation new liq electrolyte.Polyethylene glycol oxide is added in the new liq electrolyte, gel forms a kind of gel electrolyte that is used for nano-crystalline solar battery under room temperature again.
Specific embodiment
Embodiment 1
Get elemental iodine 0.0305g, lithium iodide 0.1607g respectively and add in the 4ml acetonitrile solution, fully dissolving forms liquid electrolyte, and wherein the molar concentration rate of elemental iodine and lithium iodide is 0.03: 0.3.Take by weighing fluorescein 8G 2.08 * 10
-5G joins in the liquid electrolyte, is mixed with 0.0005% new liq electrolyte.Then take by weighing the 0.8g molecular weight and be 1,000,000 polyethylene glycol oxide, add in the new liq electrolyte, place that gel forms a kind of gel electrolyte that is used for nano-crystalline solar battery under the room temperature.Be assembled into nano-crystalline solar battery with this electrolyte, dyestuff is a ruthenium complex N3 dyestuff, and the light anode is nano titanium oxide (P25) film.At room temperature, use the xenon lamp simulated solar irradiation, intensity is 500W, and the effective light-receiving area of battery is 0.25cm
2, the open circuit voltage that records battery is 0.61V, density of photocurrent is 9.82mA/cm
2, the photoelectric conversion efficiency that calculates battery is 4.58%.(see figure 1)
Get elemental iodine 0.0305g, lithium iodide 0.1607g respectively and add in the 4ml acetonitrile solution, fully dissolving forms liquid electrolyte, and wherein the molar concentration rate of elemental iodine and lithium iodide is 0.03: 0.3.Take by weighing fluorescein 8G 8.32 * 10
-5G joins in the liquid electrolyte, is mixed with 0.0020% new liq electrolyte.Then take by weighing the 0.8g molecular weight and be 1,000,000 polyethylene glycol oxide, add in the new liq electrolyte, place that gel forms a kind of gel electrolyte that is used for nano-crystalline solar battery under the room temperature.Be assembled into nano-crystalline solar battery with this electrolyte, dyestuff is a ruthenium complex N3 dyestuff, and the light anode is nano titanium oxide (P25) film.At room temperature, use the xenon lamp simulated solar irradiation, intensity is 500W, and the effective light-receiving area of battery is 0.25cm
2, the open circuit voltage that records battery is 0.61V, density of photocurrent is 9.82mA/cm
2, the photoelectric conversion efficiency that calculates battery is 6.02%.(see figure 2)
Embodiment 3
Get elemental iodine 0.0305g, lithium iodide 0.1607g respectively and add in the 4ml acetonitrile solution, fully dissolving forms liquid electrolyte, and wherein the molar concentration rate of elemental iodine and lithium iodide is 0.03: 0.3.Take by weighing fluorescein 8G 1.45 * 10
-4G joins in the liquid electrolyte, is mixed with 0.0035% new liq electrolyte.Then take by weighing the 0.8g molecular weight and be 1,000,000 polyethylene glycol oxide, add in the new liq electrolyte, place that gel forms a kind of gel electrolyte that is used for nano-crystalline solar battery under the room temperature.Be assembled into nano-crystalline solar battery with this electrolyte, dyestuff is a ruthenium complex N3 dyestuff, and the light anode is nano titanium oxide (P25) film.At room temperature, use the xenon lamp simulated solar irradiation, intensity is 500W, and the effective light-receiving area of battery is 0.25cm
2, the open circuit voltage that records battery is 0.60V, density of photocurrent is 10.90mA/cm
2, the photoelectric conversion efficiency that calculates battery is 5.50%.(see figure 3)
Embodiment 4
Get elemental iodine 0.0305g, lithium iodide 0.1607g respectively and add in the 4ml acetonitrile solution, fully dissolving forms liquid electrolyte, and wherein the molar concentration rate of elemental iodine and lithium iodide is 0.03: 0.3.Take by weighing Eu (tta)
3L2.08 * 10
-5G adds in the liquid electrolyte, is mixed with 0.0005% new liq electrolyte.Then take by weighing the 0.8g molecular weight and be 1,000,000 polyethylene glycol oxide, add in the new liq electrolyte, place that gel forms a kind of gel electrolyte that is used for nano-crystalline solar battery under the room temperature.Be assembled into nano-crystalline solar battery with this electrolyte, dyestuff is a ruthenium complex N3 dyestuff, and the light anode is nano titanium oxide (P25) film.At room temperature, use the xenon lamp simulated solar irradiation, intensity is 500W, and the effective light-receiving area of battery is 0.25cm
2, the open circuit voltage that records battery is 0.65V, density of photocurrent is 10.08mA/cm
2, the photoelectric conversion efficiency that calculates battery is 4.02%.(see figure 4)
Get elemental iodine 0.0305g, lithium iodide 0.1607g respectively and add in the 4ml acetonitrile solution, fully dissolving forms liquid electrolyte, and wherein the molar concentration rate of elemental iodine and lithium iodide is 0.03: 0.3.Take by weighing Eu (tta)
3L4.16 * 10
-5G adds in the liquid electrolyte, is mixed with 0.0010% new liq electrolyte.Then take by weighing the 0.8g molecular weight and be 1,000,000 polyethylene glycol oxide, add in the new liq electrolyte, place that gel forms a kind of gel electrolyte that is used for nano-crystalline solar battery under the room temperature.Be assembled into nano-crystalline solar battery with this electrolyte, dyestuff is a ruthenium complex N3 dyestuff, and the light anode is nano titanium oxide (P25) film.At room temperature, use the xenon lamp simulated solar irradiation, intensity is 500W, and the effective light-receiving area of battery is 0.25cm
2, the open circuit voltage that records battery is 0.69V, density of photocurrent is 10.81mA/cm
2, the photoelectric conversion efficiency that calculates battery is 6.01%.(see figure 5)
Embodiment 6
Get elemental iodine 0.0305g, lithium iodide 0.1607g respectively and add in the 4ml acetonitrile solution, fully dissolving forms liquid electrolyte, and wherein the molar concentration rate of iodine and lithium iodide is 0.03: 0.3.Take by weighing Eu (tta)
3L2.08 * 10
-5G adds in the liquid electrolyte, is mixed with 0.0035% new liq electrolyte.Take by weighing the 0.8g molecular weight and be 1,000,000 polyethylene glycol oxide, add in the new liq electrolyte, gel at room temperature is formed for the gel electrolyte of nano-crystalline solar battery.Be assembled into nano-crystalline solar battery with this electrolyte, dyestuff is a ruthenium complex N3 dyestuff, and the light anode is nano titanium oxide (P25) film.At room temperature, use the xenon lamp simulated solar irradiation, intensity is 500W, and the effective light-receiving area of battery is 0.25cm
2, the open circuit voltage that records battery is 0.68V, density of photocurrent is 10.86mA/cm
2, calculating photoelectric conversion efficiency is 6.88%.(see figure 6)
Claims (3)
1. a light modulation functional gel electrolyte that is used for nano-crystalline solar battery comprises gel electrolyte, and it is characterized in that: described gel electrolyte each component is respectively according to mass percent:
Fluorescent dye 0.0005%-0.0035%;
Liquid electrolyte 80.7280%-80.7250%;
Polyethylene glycol oxide 19.2715%.
2. require 1 described a kind of light modulation functional gel electrolyte that is used for nano-crystalline solar battery according to patent, it is characterized in that: described fluorescent dye is fluorescein 8G or Eu (tta)
3A kind of among the L.
3. require 1 described a kind of light modulation functional gel electrolyte that is used for nano-crystalline solar battery according to patent, it is characterized in that: described liquid electrolyte is the acetonitrile solution that contains iodine and lithium iodide, and wherein the molar concentration rate of iodine and lithium iodide is 0.03: 0.3.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496465A (en) * | 2011-12-16 | 2012-06-13 | 奇瑞汽车股份有限公司 | Electrolyte for dye-sensitized solar cell and preparation method thereof, and solar cell |
| CN103021661A (en) * | 2012-12-11 | 2013-04-03 | 彩虹集团公司 | New electrolyte for nano-crystalline solar cell |
Citations (3)
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|---|---|---|---|---|
| EP2067838A1 (en) * | 2007-12-04 | 2009-06-10 | Sony Corporation | A medium for photon energy up-conversion |
| CN101494248A (en) * | 2009-03-05 | 2009-07-29 | 中山大学 | Flat-plate concentration solar battery and method for manufacturing the same |
| CN101597315A (en) * | 2009-03-10 | 2009-12-09 | 北京大学 | A kind of organometallic complex gel factor reaches by its luminous gel that constitutes |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2067838A1 (en) * | 2007-12-04 | 2009-06-10 | Sony Corporation | A medium for photon energy up-conversion |
| CN101494248A (en) * | 2009-03-05 | 2009-07-29 | 中山大学 | Flat-plate concentration solar battery and method for manufacturing the same |
| CN101597315A (en) * | 2009-03-10 | 2009-12-09 | 北京大学 | A kind of organometallic complex gel factor reaches by its luminous gel that constitutes |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496465A (en) * | 2011-12-16 | 2012-06-13 | 奇瑞汽车股份有限公司 | Electrolyte for dye-sensitized solar cell and preparation method thereof, and solar cell |
| CN103021661A (en) * | 2012-12-11 | 2013-04-03 | 彩虹集团公司 | New electrolyte for nano-crystalline solar cell |
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