CN101038940A

CN101038940A - High-efficiency composite solar cell

Info

Publication number: CN101038940A
Application number: CNA2007100109540A
Authority: CN
Inventors: 王贺权; 钦兰云; 朱文祥; 杨光
Original assignee: Shenyang Institute of Aeronautical Engineering
Current assignee: Shenyang Institute of Aeronautical Engineering
Priority date: 2007-04-13
Filing date: 2007-04-13
Publication date: 2007-09-19

Abstract

The invention provides a high effective composite solar cell which is comprised by a convex 1, a triangular prism 2, composite solar cells 3 and a pedestal 5. The convex 1 and the triangular prism 2 and the composite solar cells 3 are fixed to the pedestal 5. The convex 1 and the triangular prism 2 are arranged in front of the composite solar cell 3. The composite solar cells 3 are comprised by seven solar cells. The sun light is concentrated by the convex to intensify light intensity, and then is refracted by the triangular prism to decompose the polychromatic light into monochromatic light and then irradiates the composite cell. The distance between the triangular prism and the cell is regulated for matching the width of each monochromatic light such as red, orange, yellow, green, cyan, blue, purple with the width of corresponding material. The invention decomposes the sun light to make each monochromatic light to correspond to the material of high photoelectric conversion efficiency, in this manner, the provided composite cell has the highest photoelectric conversion efficiency for the visible light.

Description

High-efficiency composite solar cell

Technical field: the present invention relates to a kind of solar cell, especially a kind of high-efficiency composite solar cell belongs to the utilization of new energy resources field.

Background technology: along with global Increase of population and rapid economy development, energy shortage and problem of environmental pollution become increasingly conspicuous.Existing fossil energy is non-renewable energy resources, can face the exhausted problem of exploitation at foreseeable future, and solar energy is inexhaustible, nexhaustible clean energy resource.Therefore, the research and utilization regenerative resource particularly solar energy to solving energy crisis and environmental protection, significant to the sustainable development of human society.

From 1839, Becquerel (Becquerel) reported first has been found photovoltaic effect in electrolyte after, the mankind stepped the first step of solar cell research.U.S. inventor Charles Fritts in 1883 have made the barrier-layer cell of selenium.Roentgen Einstein had set up band theory of solid in 1904, had proved for the first time and had utilized solar cell to be directly changed into electric energy to solar energy.It is 6% single crystal silicon solar cell that people such as D.M.Chapin in 1954 have been developed into photoelectric conversion efficiency first in Bell Laboratory, thereby has been born practical photovoltaic power generation technology, and the first generation product of existing silion cell occurred.Solar cell has all had development at full speed in theory or on actual the manufacturing after nineteen fifty-five.1958 on " pioneer " number artificial satellite first Application single crystal silicon solar cell.Since 1956, cadmium sulfide (CdS) solar cell, copper sulfide-cadmium sulfide (Cu have been developed into again successively ₂S-CdS) solar cell and GaAs (GaAs) solar cell, after this more than ten years, solar cell is mainly used in space.Energy crisis had for the first time been broken out in the world in 1973; make people recognize the finiteness that fossil energy is stored and supplied with on the earth clear-headedly; objectively require people must seek other alternative energy technology, change existing to use the energy resource supply structure of the unification stone energy.For this reason, with the numerous and confused research and development that drops into a large amount of human and material resources and financial support solar cell of the western developed country headed by the U.S., simultaneously under impelling with environmental problems such as the air pollution relevant that need to be resolved hurrily, greenhouse effect with the fossil energy burning, in worldwide, start the upsurge of development and use solar energy, also drawn back the prelude of Ground Application solar cell thus.

Though solar energy is a kind of cleaning, the pollution-free green energy, also is subjected to the restriction of two main bottlenecks for large-area applications: one, cost; Two, efficient.Although silicon solar cell has dropped to present 5 dollars/watt from about 10000 dollars/watt, but is difficult to allow people accept.For this reason, people have developed the solar cell of other cheap materials, comprising amorphous silicon film solar battery, polysilicon thin-film solar battery, copper indium diselenide (CIS), GaAs and cadmium sulphide membrane battery, organic photovoltaic cell and plastic battery, but efficient is all very low, is difficult to commercial applications.Energy conversion efficiency according to present theoretical solar cell is no more than 30%, up to the present has only Zhao of University of New South Wales to build China and realized 4cm in the laboratory ²PERL silion cell conversion efficiency be world's highest record of 24.7%, and business-like battery also has only tens percent.Therefore, efficient solar battery is a current hot research direction.

Summary of the invention:, the invention provides a kind of composite solar cell efficiently at above-mentioned the deficiencies in the prior art.

For achieving the above object, the technical solution used in the present invention is: high-efficiency composite solar cell, form by convex lens (1), prism (2), composite solar cell (3) and base (5).Convex lens (1), prism (2) and composite solar cell (3) are fixed on the base (5).It is preceding that convex lens (1) and prism (2) are in composite solar cell (3).Composite battery (3) is made up of seven solar cells.

Sunlight, resolves into monochromatic light by the refraction of prism with polychromatic light again and shines on the composite battery to strengthen light intensity by convex lens optically focused.The present invention decomposes sunlight, makes the high material of each monochromatic light and corresponding photoelectric conversion efficiency corresponding, and battery of the present invention like this is the highest to the photoelectric conversion efficiency of visible light.

Description of drawings:

Fig. 1 is a structural representation of the present invention.

Fig. 2 is a fundamental diagram of the present invention.

Fig. 3 is the fundamental diagram of embodiment.

Embodiment:

As shown in Figure 1: high-efficiency composite solar cell, form by convex lens 1, prism 2, composite solar cell 3 and base 5.Convex lens 1, prism 2 and composite solar cell 3 are fixed on the base 5.Before convex lens 1 and prism 2 are in composite solar cell 3.Composite battery 3 is made up of seven solar cells.

As shown in Figure 2, sunlight 4, resolves into monochromatic light by the refraction of prism 2 with polychromatic light again and shines on the composite battery 3 to strengthen light intensity by convex lens 1 optically focused.The distance of adjusting prism 2 and composite battery 3 is complementary the width of each monochromatic width of red, orange, yellow, green, blue, blue, purple and corresponding solar cell material.

Solar cell is to be the device of electric energy with transform light energy, the fine or not key of weighing a battery is the photoelectric conversion efficiency of battery, and the reason that influences battery conversion efficiency much comprises its structure, characteristic, material character, working temperature, radioactive particle radiation event and the environmental change etc. of knot, but one of them important factor is a spectral response characteristic, it is meant the light of solar cell to some specific wavelength, can provide maximum electric current, produce best response characteristic.We know that sunlight (being white light) is a polychromatic light, constitute by seven kinds of color of light of red, orange, yellow, green, blue, blue, purple, the photoelectric conversion efficiency of our the present solar cell of studying is the mean value of homogenous material to the photoelectric conversion efficiency of polychromatic light, studies us by forefathers and finds that Si battery, GaAs battery, CdTe battery, CdS battery etc. all have best spectral response to the light of different wave length.Given this, we can study monochromatic light in the visible light earlier for the photoelectric conversion efficiency height of which kind of material cell, to make bar shaped by red to the high material of various monochromatic light ray photoelectric transformation efficiencies afterwards, orange, yellow, green, blue or green, blue, purple sequence arrangement is good, every width is pressed each monochromatic light width of visible light refraction and is decided, we just can make the solar cell of a composite material like this, and add convex lens and prism in the solar cell front, convex lens are used for optically focused, prism is used for polychromatic light is resolved into monochromatic light, and the distance of adjusting prism and battery makes red, orange, yellow, green, blue or green, blue, the width of purple each monochromatic width and respective material is complementary.

Embodiment:

Various different colours light wavelengths

Color	Wavelength/nm	Standard wave length/nm	Color	Wavelength/nm	Standard wave length/nm
Color	Wavelength/nm	Standard wave length/nm	Color	Wavelength/nm	Standard wave length/nm	Purple	390～455	430	Yellow	550～585	570
Blue	455～485	470	Orange	585～620	600	Purple	390～455	430	Yellow	550～585	570
Blue	455～485	470	Orange	585～620	600	Blue or green	485～505	495	Red	620～750	640
Green	505～550	530				Blue or green	485～505	495	Red	620～750	640

Last tabular has gone out the wave band and the standard wave length of the light of various different colours.We know that the spectral response range of ZnSe solar cell is 300～475nm, and the optimal response wavelength is 400nm, can corresponding purple light; The spectral response range of CdS solar cell is 300～500nm, and the optimal response wavelength is 460nm, can corresponding blue light; The spectral response range of GaAs solar cell is 440～870nm, and has occurred more straight optimal response wave band between 480nm～600nm, can corresponding blue or green, green, three kinds of light of Huang; The spectral response range of CdTe solar cell is 550～800nm, and the optimal response wavelength is 600nm, can corresponding orange light; The spectral response range of Si solar cell length is 400～1100nm, and the optimal response wavelength is 700nm, can corresponding ruddiness.Therefore, this high-efficiency composite solar cell can be made of jointly ZnSe, CdS, GaAs, CdTe, Si solar cell, and as shown in Figure 3, its efficient will be higher than the single efficient of battery under common sunlight (white light) irradiation of planting.

Claims

1, high-efficiency composite solar cell comprises base (5), it is characterized in that, it also comprises convex lens (1), prism (2) and the composite solar cell (3) that is fixed on the base (5); It is preceding that convex lens (1) and prism (2) are in composite solar cell (3); Composite battery (3) is made up of seven solar cells.

2, high-efficiency composite solar cell as claimed in claim 1 is characterized in that, composite solar cell (3) is made of jointly ZnSe, CdS, GaAs, CdTe, Si solar cell.