Discovery of new semiconductor materials for solar cells and development of cathode materials for high-performance lithium-ion batteries.
1. Discovery of new semiconductor materials for solar cells: Professor Zhang Yanbi discovered a new semiconductor material, copper indium gallium selenide (CIGS), which has a high light absorption coefficient high and high photoelectric conversion efficiency. used as one of the key materials of solar cells.
2. Developing high-performance lithium-ion battery cathode materials: Professor Zhang Yanbi and his team developed a new type of lithium-ion battery cathode material: lithium manganate/vanadium oxide composite material, which has high discharge. capacity, long life and good safety performance.
What is PVE?
This is a very interesting questionante. I can't give you precise data, but I can describe it:
Damn. solar energy film has good layers of amorphous or microcrystalline silicon, CIGS, CdTe, organic thin films.
- For amorphous or microcrystalline silicon, the bending ability of the amorphous silicon itself must be very good. After all, it has an amorphous structure, is extremely thin and has been exposed to high temperatures. small and unlikely to fail due to repeated bending. The bottleneck of the bending strength of amorphous silicon lies in the TCO electrode. Regardless of ITO, AZO or FTO, electrical performance will decline to varying degrees after multiple bends.
- For CIGS, the CIGS absorption layer is heated to high temperature and the stress is released. However, because CIGS has a polycrystalline structure and the film thickness is thicker than that of silicon amorph, the bending resistance may be lower. But it won't be much different, and everything will be fine under normal use. The bottleneck of CIGS remains the TCO electrode and the back Mo electrode. Mo is a very fragile metal and it is pulverized, so the internal stress is relatively large.
- CdTe is similar to CIGS in that the metal back electrode and the TCO front electrode are mainly responsible for its failure caused by bending.
- Finally, there is the organic film. It is estimated that organic film should be the solar cell capable of achieving the highest plasticity. Its functional layer is a small organic molecule or polymer layer, and metal. The electrode can be a very thin active metal. Generally, the active metals are very soft and the TCO can be made of organic transparent conductive polymers. This way you can leanat will...
But wait a minute. Since you asked about the plasticity of the solar film, you must by default make it on a flexible substrate, otherwise who can mold it on glass. In this way, we must consider two issues: 1. The plasticity of the substrate itself, and 2. The encapsulation issues.
When it comes to the base material itself, there are several options such as plastic, metal foil, and flexible glass. Plasticity is naturally plastic>metal sheet>flexible glass.
However, from a packaging point of view, organic solar energy will die quickly when exposed to outside air and humidity, and the packaging requirements are particularly high. However, the most suitable flexible plastic substrate for organic solar energy should be chosen. use inorganic film is used to block water vapor and the top ofe battery must also have similar packaging. This blocks and flexibility of the packaging film has become a bottleneck for organic solar cells. Compared with other batteries, TCO and other films examine changes in their electrical properties after folding, while packaging films examine changes in their breathability after folding. It is also difficult to compare the two.
To return to your question, use a material to describe its plasticity. In the short term, no matter what the base material is, it has the plasticity of this material, because thin-film solar cells are too thin and insignificant. But in the long run, if you want to know the performance decline of solar cells after repeated bending, you can only analyze specific problems and use experimental data to speak.
PVE is a polyvinyl ether material. THEPVE material is a polyvinyl ether material with industrial production value, which can realize photoelectric conversion and is the main component of solar cells. PVE materials can also refer to materials used to make photovoltaic cells. Their main function is to convert light energy into electrical energy. As of January 24, 2024, common PVE materials mainly include silicon, copper indium gallium selenide (CIGS), and indium gallium. Zinc sulfur (IGZO), etc., has the advantages of high stability, long life and low cost, so it occupies a dominant position in the market with the advancement and continuous innovation of science and technology, types and properties of PVE. materials will be further improved and improved, giving new impetus to the development of the photovoltaic industry.