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Synergy method of surface plasmon metallic nano-chain in solar battery

A surface plasmon and solar cell technology, applied in the field of solar cells, can solve the problems of low sunlight absorption efficiency and low light absorption efficiency, and achieve the effects of improving absorption efficiency, improving photoelectric conversion efficiency, and increasing effective transmission distance

Active Publication Date: 2011-08-17
SOUTHEAST UNIV
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Problems solved by technology

An important technical bottleneck in the field of solar cells is that the absorption efficiency of solar cells for sunlight is not high at present, especially for long-wavelength bands with wavelengths above 600 nanometers.

Method used

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  • Synergy method of surface plasmon metallic nano-chain in solar battery
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  • Synergy method of surface plasmon metallic nano-chain in solar battery

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preparation example Construction

[0022] The preparation method of the metal nanochain 11 includes a variety of physical and chemical methods, including, firstly, the colloidal solution of the metal nanoparticle 12 is prepared by a chemical synthesis method, and then by a chemical self-assembly method or a chemical anisotropic etching method or a chemical welding method or The metal nanoparticles 12 in the colloidal solution are welded into metal nanochains 11 by laser irradiation welding method or heating welding method, etc. Then deposit the metal nanochains 11 in the sol solution on the surface of the back electrode 2 of the solar cell by a deposition method, a chemical self-assembly method or a drop coating method, and let the solvent volatilize naturally. Alternatively, a metal film with a thickness of several nanometers to hundreds of nanometers is coated on the surface of the back electrode 2 of the solar cell by sputtering coating method or thermal evaporation coating or other metal coating methods, and...

Embodiment 1

[0028] Embodiment 1: Prepare metal nanoparticles 12 as spherical metal nanochains 11 on the surface of the back electrode 2 of the solar cell. The metal nanosilver particle solution is prepared by a chemical synthesis method, and the diameter of the metal particles is about tens of nanometers to hundreds of nanometers. Femtosecond laser welding technology is used to irradiate the metal nano-silver particle solution, and the metal nano-silver particles are welded into metal silver nano-chains, and the number of metal nanoparticles contained in each nano-chain is not limited. The metallic silver particles overlap each other, and the overlapping thickness is about several nanometers. After welding, the surface of the back electrode 2 is coated with a configuration solution containing metallic silver nanochains, and then the solution is evaporated. Then, according to the standard solar cell preparation process, structures such as the photovoltaic layer 3 and the photoanode 4 are p...

Embodiment 2

[0029] Embodiment 2: prepare metal nanoparticles 12 on the surface of the back electrode 2 of the solar cell to be disc-shaped metal nanochains 11, clean and dry the prepared solar cell back electrode 2 substrates, and use magnetron sputtering, thermal evaporation Plating and other coating processes deposit a layer of metallic silver film with a thickness ranging from tens of nanometers to hundreds of nanometers. The silver nanochain structure is prepared by electron beam etching, and the excess metal film is removed. In this way, an array of metal silver nanochains 11 with uniform shape and orderly arrangement direction can be prepared. Then, according to the standard solar cell preparation process, structures such as the photovoltaic layer 3 and the photoanode 4 are prepared.

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Abstract

The invention belongs to the technical field of solar batteries, in particular relating to a synergy method of a surface plasmon metallic nano-chain in a solar battery. In the process of manufacturing the solar battery, a layer of metallic nano-film consisting of the metallic nano-chain is manufactured between the back electrode and photovoltaic layer of the solar battery. An incident light is localized on the surface of the metallic nano-chain after passing through a light cathode and the photovoltaic layer to form a horizontally transmitted surface plasmon transmission mode, therefore, the effective transmission distance of the incident light at the photovoltaic layer is greatly increased, thereby, improving the absorption efficiency of the solar battery to the incident light and greatly improving the photoelectric conversion efficiency of the solar battery. The technology further has the advantages of diversified manufacturing processes, low manufacturing cost, obvious synergy effect and the like.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a method for synergizing surface plasmon metal nano chains in solar cells. Background technique [0002] Energy issues are one of the most important issues facing society today. With the gradual depletion of fossil fuel energy, finding new and renewable energy sources has become a hot issue in the field of scientific research. Solar energy is an inexhaustible renewable and clean energy for human beings. It has the greatest potential to become the mainstream energy in the world. Its development and utilization have attracted widespread attention. An important technical bottleneck in the field of solar cells is that the current absorption efficiency of solar cells for sunlight is not high, especially for long-wavelength bands with wavelengths above 600 nanometers. These long-wavelength sunlight account for 30% of the total energy of the entire solar spectrum. If they can be ef...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 张彤张晓阳朱圣清
Owner SOUTHEAST UNIV
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