With the continuous development and application of new energy, scientists are also thinking about how to make full use of new energy resources and reduce some unnecessary losses during use. As a result, a new hybrid material for solar cells came into being, using the material can be part of the original was wasted solar energy into electrical energy, thus greatly improving the conversion efficiency of solar energy. After a series of experiments and research conducted by Professor Christopher Bardeen and his team at the University of California, San Diego, USA, we found that mixed molecular nanocrystals can combine two kinds of low-energy photons to produce a high-energy photon, which not only maximizes the solar energy conversion efficiency but also greatly Reduce the cost of solar power generation, marking a significant step forward in the preparation of solar cells. Caption: (a) When a green laser beam is applied to the cadmium selenide coated with organic material, it will be converted to more energetic light. (B) When irradiated with cadmium selenide coated with other materials Light will pass directly. Scientists pointed out that the rainbow is composed of photons of different wavelengths, different wavelengths, which emit energy is also different, in general, the longer the photon wavelength, the lower the energy, which is also for solar energy engineers to prepare solar energy The battery provides inspiration. The working principle of a solar cell is that photons interact with electrons and convert the photon energy into electrical energy. All solar cells have a bandgap (the difference between the lowest point of the conduction band and the highest point of the valence band, the greater the bandgap and the lower the conductivity of the conduction band). In use, the solar cell only Can use the photon energy higher than the band gap, and the photon energy below the band gap can not be well utilized. As a result, the solar cell solar light capture rate of less than 34%, and if the two kinds of low-energy photons can be combined into a photon of energy higher than the band gap, the excess energy can be captured, thereby increasing the solar cell Conversion efficiency. Specifically, this conversion process: a photon to one of the electron's energy increased to the excited state, and in the electronic back to the ground state will appear before another photon; followed by a second photon electron energy will be increased again to Higher excited state, and when the electron changes to the ground state again, it releases the energy of both through a single shorter photon of light. So how to make photons of the above conversion? Bardeen passed a series of experimental studies and found that selenium nanocrystals coated with organic molecules of rubrene and diphenylanthracene can convert near-infrared photons to orange-yellow light with a wavelength of 550 nm. Berdeen said: "This selenium nanocrystal absorbs two photons and then transfers its energy to the organic components of the organic compound, producing a high-energy photon." Simply put, it is absorbed first by the inorganic material in the composite The photons are then released by the organics. "Berdeen notes that by" special handling "of infrared light, the sun's absorption of solar cells is greatly increased, resulting in a 1,000-fold improvement in the solar cell's power conversion efficiency. Tungsten carbide mixed Metal Alloy Powder is commonly used in PTA (Plasma Transferred Arc) welding. PTA welding is a process that involves the deposition of a hardfacing material onto a base metal to provide wear resistance, corrosion resistance, and improved mechanical properties. Mixed Powder,Arc Welding Powder,Pta Welding Powder,Plasma Welding Powder Luoyang Golden Egret Geotools Co., Ltd , https://www.xtchvof.com
Tungsten carbide is a very hard and wear-resistant material, making it ideal for applications where high abrasion resistance is required. It is often mixed with other metals, such as nickel, cobalt, or chromium, to form a metal alloy powder. These metal alloys enhance the properties of the tungsten carbide and improve its compatibility with the base metal.
The tungsten carbide mix metal alloy powder is typically fed into the PTA welding torch, where it is melted and propelled onto the surface of the base metal using a high-energy plasma arc. The molten powder forms a hard, dense coating that bonds with the base metal, providing excellent wear resistance and protection.
The specific composition of the tungsten carbide mix metal alloy powder can vary depending on the application requirements. Different ratios of tungsten carbide and other metals can be used to achieve desired properties, such as hardness, toughness, and corrosion resistance.
Overall, tungsten carbide mix metal alloy powder is a versatile and effective material for PTA welding, offering superior wear resistance and protection for various industrial applications.