CN102127435A - Light conversion material and preparation method thereof - Google Patents
Light conversion material and preparation method thereof Download PDFInfo
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- CN102127435A CN102127435A CN2010105490028A CN201010549002A CN102127435A CN 102127435 A CN102127435 A CN 102127435A CN 2010105490028 A CN2010105490028 A CN 2010105490028A CN 201010549002 A CN201010549002 A CN 201010549002A CN 102127435 A CN102127435 A CN 102127435A
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/52—PV systems with concentrators
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Abstract
The invention discloses a light conversion material and a preparation method thereof. The general composition formula of the light conversion material is Pb2-xMo1-yWyO6:Yb3+x, wherein x is more than or equal to 0.01 and less than or equal to 0.7; and y is more than or equal to 0 and less than or equal to 1. The preparation method of the light conversion material comprises the following steps: weighing the oxides or corresponding salts of Pb, Mo, W and Yb elements according to the chemical composition formula; fully and uniformly mixing, and sintering for 2 to 6 hours at 1,200 to 1,400 DEG C in an air or nitrogen atmosphere; and cooling to room temperature, taking out and fully grinding to obtain the light conversion material. The excitation spectrum of the light conversion material is very wide, has high absorption performance in a range from an ultraviolet light area to a visible light area, and can effectively absorb solar and relieve the thermal effect of the solar cells. The light conversion material has higher near infrared ray emitting capacity, the emission peak is between 950 to 1,100 nanometers and the energy of the material is perfectly matched with the energy gap of silicon. The light conversion material is a potential silicon-base light conversion material for solar cells and can improve the photoelectric conversion efficiency of the silicon-base solar cells.
Description
Technical field
The present invention relates to a kind of light-converting material and preparation method thereof.
Background technology
When Nonrenewable resources such as coal, oil, Sweet natural gas reduce day by day, when energy problem became the bottleneck of restriction international community Economic development gradually, tapping a new source of energy became an important subject of the world today.In numerous new forms of energy, sun power is human inexhaustible renewable energy sources. also be clean energy, do not produce any environmental pollution, so the research of sun power and utilization receive much concern.And with fastest developing speed, most active research field is the solar photovoltaic utilization of sun power, i.e. solar cell.Solar cell is a kind of device that solar energy is converted into electric energy owing to photovoltaic effect, it is a semiconductor photo diode, when solar irradiation was to photorectifier, photorectifier will become electric energy to the luminous energy of the sun, produced electric current.Solar cell can be divided into according to the difference of material therefor: silicon solar cell, multi-element compounds thin-film solar cells, polymer multi-layer modified electrode type solar cell, nano-crystalline solar battery, organic solar batteries, wherein silicon solar cell is that development is the most sophisticated at present, occupies dominant position in application.
The energy gap of crystalline silicon is 1.12ev approximately, be equivalent to 1000nm, and energy mainly concentrates on visible region in the sun power spectrum, spectrographic does not match and makes that the sunlight utilising efficiency is low, and the battery heat effect is serious, and this finally causes the silica-based solar cell photoelectric transformation efficiency low.Therefore adjust sun power spectrum, it can be an effective way that improves solar battery efficiency by the infrared light of solar cell efficient absorption that visible light is converted into.
That study that more silica-based solar cell mainly utilizes with light-converting material is Yb
3+The ion infrared emission, its emission is positioned at the 1000nm place, mates very much with the energy gap of silicon single crystal, but Yb
3+Ion ultraviolet to the visible region specific absorption a little less than, perhaps almost do not absorb.Mainly take to mix trivalent rare earth ions (as: Tb at present
3+, Pr
3+, Er
3+Deng) method of making sensitizing agent improves it in the absorption of ultraviolet to visible region.Though these sensitized ions have absorption in ultraviolet to visible region, its absorption all is wire, and absorption intensity is more weak.And light-converting material of the present invention is utilizing Yb
3+In the time of emission of ions, improve its its in the absorption of ultraviolet to the visible region, weaken the heat effect of silica-based solar cell simultaneously, be the material that potential improves silica-based solar cell efficient.
Summary of the invention
The objective of the invention is to overcome the deficiency that prior art exists, a kind of silica-based solar cell light-converting material that can effectively be excited and have strong near infrared emission by ultraviolet to visible light is provided.
Another object of the present invention provides the preparation method of above-mentioned light-converting material.
For achieving the above object, the present invention takes following technical scheme:
Light-converting material provided by the invention, its chemical constitution formula is: Pb
2-xMo
1-yW
yO
6: Yb
3+ x0.01≤x≤0.7; 0≤y≤1.
The preparation method of above-mentioned light-converting material comprises the steps: according to chemical constitution formula, take by weighing the oxide compound or the corresponding salt of Pb, Mo, W or Yb element, after thorough mixing is even, 1200～1400 ℃ of sintering are 2～6 hours under air or nitrogen atmosphere, take out and fully grind after being cooled to room temperature, promptly obtain light-converting material.
Light-converting material of the present invention can effectively absorb near-ultraviolet light and the blue light of 250nm ~ 450nm, and emission peak wavelength is positioned at the near infrared light of 950nm ~ 1100nm effectively, is a kind of novel light-converting material that is applicable to that silica-based solar cell is used.
Compared with prior art, the present invention has following beneficial effect:
1, the non-constant width of the excitation spectrum of light-converting material of the present invention, (250nm ~ 450nm) all have strong absorption can effectively absorb solar energy, and weakens the heat effect of solar cell simultaneously to visible region in ultraviolet.
2, light-converting material of the present invention has strong near infrared emission, the emission main peak is positioned at 950nm ~ 1100nm, the energy gap perfection of its energy and silicon is complementary, and is potential silica-based solar cell light-converting material, can improve the photoelectric transformation efficiency of silica-based solar cell.
3, light-converting material Stability Analysis of Structures of the present invention, simple, the easy handling of preparation method.
Description of drawings
Fig. 1 is Pb
1.3MoO
6: Yb
3+ 0.7The room temperature of light-converting material excites and emmission spectrum figure;
Fig. 2 is Pb
1.6Mo
0.5W
0.5O
6: Yb
3+ 0.4The room temperature of light-converting material excites and emmission spectrum figure.
Embodiment
Embodiment 1:Pb
1.3MoO
6: Yb
3+ 0.7The preparation of light-converting material
Take by weighing plumbous oxide (Pb respectively
2O
3) 0.7776g, molybdic oxide (MoO
3) 0.4750g, ytterbium oxide (Yb
2O
3) 0.4552g, above-mentioned raw materials ground mixing in agate mortar after, 1200 ℃ of calcinations are 6 hours in air, be cooled to take out after the room temperature and fully grinding promptly obtain sample.The room temperature of this light-converting material excites with emmission spectrum sees Fig. 1.
Embodiment 2:Pb
1.6Mo
0.5W
0.5O
6: Yb
3+ 0.4The preparation of light-converting material
Take by weighing plumbous oxide (Pb respectively
2O
3) 0.8601g, molybdic oxide (MoO
3) 0.4750g, tungstic oxide (WO
3) 0.7651g, ytterbium oxide (Yb
2O
3) 0.2601g, above-mentioned raw materials ground mixing in agate mortar after, 1400 ℃ of calcinations are 2 hours in air, be cooled to take out after the room temperature and fully grinding promptly obtain sample.The room temperature of this light-converting material excites with emmission spectrum sees Fig. 2.
Claims (2)
1. a light-converting material is characterized in that its chemical constitution formula is: Pb
2-xMo
1-yW
yO
6: Yb
3+ x0.01≤x≤0.7; 0≤y≤1.
2. the preparation method of the described light-converting material of claim 1, it is characterized in that comprising the steps: according to chemical constitution formula, take by weighing the oxide compound or the corresponding salt of Pb, Mo, W or Yb element, after thorough mixing is even, 1200～1400 ℃ of sintering are 2～6 hours under air or nitrogen atmosphere, take out and fully grind after being cooled to room temperature, promptly obtain light-converting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105490028A CN102127435A (en) | 2010-11-18 | 2010-11-18 | Light conversion material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105490028A CN102127435A (en) | 2010-11-18 | 2010-11-18 | Light conversion material and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102127435A true CN102127435A (en) | 2011-07-20 |
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ID=44265713
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105490028A Pending CN102127435A (en) | 2010-11-18 | 2010-11-18 | Light conversion material and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215038A (en) * | 2013-04-03 | 2013-07-24 | 苏州大学 | Molybdate material for emitting near-infrared light under ultraviolet excitation as well as preparation method and application of molybdate material |
-
2010
- 2010-11-18 CN CN2010105490028A patent/CN102127435A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215038A (en) * | 2013-04-03 | 2013-07-24 | 苏州大学 | Molybdate material for emitting near-infrared light under ultraviolet excitation as well as preparation method and application of molybdate material |
| CN103215038B (en) * | 2013-04-03 | 2015-11-18 | 苏州大学 | A kind ofly under ultraviolet excitation, realize near-infrared luminous molybdate material, preparation method and application |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110720 |