Today, lithium batteries have relatively mature technology and are used in various scenarios. Graphene batteries are an emerging technology with high energy density, safety and reliability. In solar energy storage systems, lithium batteries are a good choice. The high reliability and safety of Wensen graphene batteries are also the best choice.
What is the functional difference between monocrystalline and polycrystalline solar panels? What is the quality of solar panels produced by Shenzhen Anjiesun Optoelectronics?
Solar cells can be divided into two categories according to the crystalline state: crystalline thin film type and amorphous thin film type (hereinafter referred to as a-), and the former is divided into monocrystalline and polycrystalline form. form.
According to the material, it can be divided into silicon thin film type, silicon thin film type,of thin layer of compound semiconductor and type of organic film. The compound semiconductor thin film type is further divided into amorphous type (a-Si:H). , a-Si:H:F , a-SixGel-x:H, etc.), Group IIIV (GaAs, InP, etc.), Group IIVI (Cds series) and zinc phosphide (Zn 3 p 2), etc. .
According to the different materials used, solar cells can also be divided into: silicon solar cells, multi-compound thin-film solar cells, polymer multi-layer modified electrode solar cells, nanocrystalline solar cells, solar cells organic solar. , among which silicon solar cells are currently the most mature and dominant applications.
(1) Silicon solar cells
Silicon solar cells are divided into three types: monocrystalline silicon solar cells, polycrystalline silicon thin film solar cells and polycrystalline silicon thin film solar cells. so cellslaires with thin layers of amorphous silicon.
Monocrystalline silicon solar cells have the highest conversion efficiency and the most mature technology. The highest laboratory conversion efficiency is 24.7% and the large-scale production efficiency is 15%. It still occupies a dominant position in large-scale applications and industrial production. However, due to the high cost and price of monocrystalline silicon, it is difficult to greatly reduce its cost in order to save silicon materials, polycrystalline silicon films and amorphous silicon. films have been developed as monocrystalline silicon solar cells.
Compared to monocrystalline silicon, polycrystalline silicon thin-film solar cells are cheaper and more efficient than amorphous silicon thin-film solar cells. Maximum conversion efficiency in laboratoryire is 18% and conversion efficiency in industrial scale production. is 10%. Therefore, polycrystalline silicon thin film cells will soon dominate the solar energy market.
Amorphous silicon thin film solar cells have low cost, light weight, high conversion efficiency, easy mass production and great potential. However, due to the photoelectric efficiency degradation effect caused by its material, its stability is not high, which directly affects its practical application. If the stability problem and the conversion rate problem can be further solved, then large amorphous silicon solar cells will undoubtedly be one of the main development products of solar cells.
(2) Multi-compound thin film solar cells
Multi-compound thin film solar cell materials are dhe inorganic salts, which mainly include compounds of gallium III-V arsenide, cadmium sulfide, cadmium. sulfide and copper-indium-selenium thin film batteries, etc.
Cadmium sulfide and cadmium telluride polycrystalline thin film solar cells have higher efficiency than amorphous silicon thin film solar cells, lower cost than monocrystalline silicon cells and are easy to mass produce. However, because cadmium is highly. toxic, it will cause serious environmental pollution, so it is not the most ideal substitute for crystalline silicon solar cells.
The conversion efficiency of the III-V gallium arsenide (GaAs) battery can reach 28%. The GaAs compound material has a very ideal optical band gap and high absorption efficiency, and has strong radiation resistance. not sensitive toheat and suitable for manufacturing high efficiency single junction cells. However, the price of GaAs materials is high, which greatly limits the popularity of GaAs batteries.
Copper indium selenide thin film cells (CIS for short) are suitable for photoelectric conversion. There is no light-induced degradation problem, and the conversion efficiency is the same as polycrystalline silicon. With the advantages of low price, good performance and simple process, it will become an important direction for the development of solar cells in the future. The only problem lies in the source of the materials. Indium and selenium being relatively rare elements, the development of this type of battery is necessarily limited.
(3) Polymer multilayer modified electrode solar cells
Replacing inorganic materials with organic polymers is a directionof research into solar cell manufacturing which has only just begun. Due to the advantages of organic materials such as flexibility, ease of production, wide material sources and low cost, they are of great importance for the large-scale utilization of solar energy and electricity supply cheap. However, research into using organic materials to prepare solar cells is only just beginning. Neither the lifespan nor the efficiency of the cells can be compared to that of inorganic materials, especially silicon cells. Whether it can become a product of practical importance remains to be studied and explored in more detail.
(4) Nanocrystalline solar cells
TiO2 crystal nanocrystalline chemical solar cells are newly developed, and their advantages lie in low cost, simple process and high performance.s stable. Its photoelectric efficiency is stable at more than 10%, and its production cost is only 1/5 to 1/10 of that of silicon solar cells. The lifespan can reach more than 20 years.
However, because the research and development of this type of battery has just started, it is estimated that it will gradually enter the market in the near future.
(5) Organic solar cells
Organic solar cells, as their name suggests, are solar cells whose core is composed of organic materials. It makes sense that not everyone is familiar with organic solar cells. More than 95% of solar cells mass-produced today are silicon-based, while the remaining less than 5% are also made of other inorganic materials.
How many degrees generate 2 MW of solar energy per hour
Monocrystalline solar panels: no pattern, dark blue, almost noirs after packaging
Polycrystalline solar panels: Patterned, polycrystalline and multicrystalline, like the snowflake crystal patterns on the snowflake-shaped iron sheets, light blue
Amorphous solar panels: most are glass, brown brown
2 MW can generate 2,000 degrees of electricity per hour.
1 degree=1KW=1KW×1 hour
1MW=1000KW, 2MW=2000KW, 2MWx1=2000KW=2000 degrees
The energy of the solar energy is The energy of celestial bodies outside the Earth (mainly solar energy) is the enormous energy released by the fusion of hydrogen nuclei in the sun at ultra-high temperatures. Most of the energy needed by humans comes directly or indirectly from the sun. Fossil fuels such as coal, oil and natural gas that we need to live are all formed by various plants that convert solar energy into chemical energy by photosynthesis and store it in plants, then by plants and animals buried underground for a long time. period of geological time. In addition, water power, wind power, wave power, ocean current power, etc. are also converted from solar energy.
There are two main types of solar power generation: one is solar power generation (also known as solar photovoltaic power generation) and the other is solar thermal power (also known as solar thermal power generation).
Solar photovoltaic power generation is a method of electricity production that directly converts solar energy into electrical energy. It includes four forms: photovoltaic power generation, photochemical power generation, photoinduction power generation and phot power generation.biological. Among photochemical power generation, there are electrochemical photovoltaic cells, photoelectrolysis cells and photocatalytic cells.
Solar thermal power generation first converts solar energy into thermal energy, and then converts thermal energy into electrical energy. It has two conversion methods. The first is to directly convert solar thermal energy into electrical energy, such as thermoelectric energy production of semiconductor or metal materials, thermal energy production of thermoelectric electrons and ions in vacuum devices , thermoelectric conversion of alkali metals and energy production by magnetic fluid. Another way is to use solar thermal energy to drive a generator to produce electricity via a heat engine (like a steam turbine), which is similar to generating electricity.conventional thermal energy, except that the thermal energy does not come from fuel, but from solar energy. energy.