With the development of Solar Panel Application industry, a variety of related components are becoming more and more hot topic in the industry. Packaging materials in solar modules have been the most important material except for silicon, including glass, plastic film, back panel, aluminum frame and silica gel. Because the main materials of the backplane has been monopolized by foreign companies, in the 07, 08, once in short supply, so the backplane is also the most interesting packaging materials.
The commonly used backplane can be divided into tpt, TPE, whole pet and/polyolefin structure. T refers to the United States DuPont Company's PVDF (PVF) film, its product name is Tedlar. P refers to two-way tensile polyethylene terephthalate film, that is, pet film,Solar Panel Application also known as polyester film or polyester film. E refers to ethylene-vinyl acetate resin EVA. Polyolefin refers to a variety of carbon-carbon structure as the main chain of plastic. In each noted structure layer between the use of appropriate adhesive bonding composite and into a solar cell back plate.
At present, the wide application of the light transmittance electrode material is metal oxide such as indium tin oxide, but its infrared spectra have strong absorption,Solar Panel Application poor thermal stability, fragile, at the same time in the use of the surface of the need to plating a layer of platinum to improve its conductivity, greatly increasing the cost of preparation. Graphene has a high level of transparency in almost all infrared rays, which helps to improve the utilization of light energy. The increase of light transmittance will lead to the decrease of carrier density, but because graphene has a very high carrier transfer rate, it can ensure a certain conductivity even if the carrier density is very small. Graphene can be prepared into flexible transparent thin film electrodes,Solar Panel Application which overcomes the fragile weakness of indium tin oxide.
Graphene has good electrical properties and can be used as a receptor material in solar cells. Graphene can be combined with organic polymer materials to form a large receptor interface, which is beneficial to the increase of the diffusion rate and carrier mobility of the exciton in the cell, eliminating the two aggregation caused by the destruction of the charge transmission path. If graphene can be combined with the P3HT or p3ot of the body material, the charge transmission path is shortened, and the receptor material can be grafted onto the graphene surface to further enhance the electrical conductivity of the C60. When graphene is a receptor material,Solar Panel Application its structural defects will reduce the electron transmission ability, increase the compound of the electron hole, can not significantly improve the photoelectric conversion efficiency of the battery, thus reducing the defects of graphene and considering the interaction and matching between graphene and the material is the focus of attention.
In addition, graphene materials are also applied to the light anodes of various solar cells. The deposition of graphene film on SI surface is advantageous to the surface passivation, doping and heterogeneous formation of SI schottky battery, and effectively improves the photoelectric conversion efficiency of the battery. In dye-sensitized solar cells, graphene and titanium dioxide are formed as the anode,Solar Panel Application which is intended to make full use of the advantages of both, improve the electron transmission speed, reduce the compound of the electron hole, further increase the absorption of the dye by the optical anode and improve the photoelectric conversion efficiency.