Guide: Solar lights are now very popular, a variety of solar floodlights: solar garden lights, solar lawn lights and other outdoor solar lights, this article will specifically talk about several types of solar light photovoltaic cells.

There are several types of solar light photovoltaic cells?

    At present, there are many kinds of materials that can produce solar photovoltaic cells, and the manufacturing methods are also different. Therefore, there are many types of solar photovoltaic cells. According to statistics, there are more than 100 kinds of so far. Although there are many types of solar photovoltaic cells, they can be classified according to the materials used or the structure of the batteries.

    (1) According to the materials used, it can be divided into two major categories: silicon solar photovoltaic cells and compound solar photovoltaic cells. Silicon solar photovoltaic cells can also be divided into crystalline silicon solar photovoltaic cells and amorphous silicon solar photovoltaic cells. Crystalline silicon solar photovoltaic cells can be further divided into monocrystalline silicon solar photovoltaic cells, polycrystalline silicon solar photovoltaic cells

. Polycrystalline silicon solar photovoltaic cells can be further divided into cast multi-product silicon solar photovoltaic cells, strip polycrystalline silicon solar photovoltaic cells and thin film polycrystalline solar cells. The principle of solar photovoltaic power generation was discovered in 1876, when British scientists such as Adams discovered that current was generated when sunlight was used to irradiate selenium semiconductor materials.

    However, the photoelectric effect produced by selenium is very weak, and the photoelectric conversion efficiency is only about 1% by the middle of the 20th century. Silicon solar photovoltaic cells were invented in 1954.

Solar light battery type

    Among the many solar photovoltaic cells, silicon solar photovoltaic cells are the best messengers, although it is not the earliest. But it is the earliest development and the most productive category to date. In 2001, the total output of monocrystalline silicon solar photovoltaic cells and polycrystalline silicon solar photovoltaic cells accounted for about 80% of the total solar photovoltaic cell production in the world.

    The original solar photovoltaic cells were only monocrystalline silicon solar photovoltaic cells. Today, not only single-product, polycrystalline, non-product solar photovoltaic cells, but also thin film solar photovoltaic cells. Initially, silicon solar photovoltaic cells have low photoelectric conversion efficiency. Only 6%, and the cost is also high, more than 1000 times higher than conventional power, can not be promoted, can only be used for those satellites and spacecraft that are not cost sensitive.

   Now that the production cost of silicon solar photovoltaic cells has been greatly reduced, it has already changed the situation of no one to care. It has become a hot spot. It is not only used on satellites and spacecraft, but also on roads, railways, etc. The photoelectric conversion efficiency used in public facilities and also used in folk monocrystalline silicon solar photovoltaic cells is quite different from that in the past. Recently, in the laboratory, the photoelectric conversion efficiency of monocrystalline silicon solar photovoltaic cells has reached 24.7%. In actual production, the photoelectric conversion efficiency of high-efficiency solar photovoltaic cells (mainly used in the space field) has reached 20%; the photoelectric conversion efficiency of conventional monocrystalline silicon solar photovoltaic cells has reached 15%-18%, and it is expected in the near future. It will reach nearly 20% in the future.

    It can be said that the wide application of silicon solar photovoltaic cells is not only related to its significant cost reduction, but also closely related to its photoelectric conversion efficiency. The photoelectric conversion efficiency of polycrystalline silicon solar photovoltaic cells is higher than that of monocrystalline silicon solar photovoltaic cells. Low, but in recent years, polysilicon solar photovoltaic cells have been improved, so that the photoelectric conversion efficiency has also been improved. Now, the template of the practical stage of 1m2 also achieves 13%~14% photoelectric conversion efficiency. Polycrystalline silicon solar photovoltaic cells are After the development of monocrystalline silicon solar photovoltaic cells, but its development speed is quite fast, is a solar photovoltaic cell that is later on.

    In 1986 and 1997, monocrystalline silicon solar photovoltaic cells produced the most, accounting for about 50% of the total. However, since 1998, polycrystalline silicon solar photovoltaic cells have increased their production, winning the monopoly of monocrystalline silicon solar photovoltaic cell production champions, becoming the first production of solar photovoltaic cells. The compound solar photovoltaic cells can also be divided into indium selenium. Copper, cadmium telluride solar photovoltaic cells and gallium arsenide, indium phosphide solar photovoltaic cells.

    The photoelectric conversion efficiency of indium selenide-copper solar photovoltaic cells currently on the market is about 10%, and the level of research and development is 12%-14%. In fact, the types of solar photovoltaic cells are not limited to these, except for the above-mentioned silicon solar photovoltaic cells and compound solar energy. In addition to photovoltaic cells, there are other types of solar photovoltaic cells, such as dye-sensitized, which have different power generation principles than the above-mentioned silicon solar photovoltaic cells and compound solar photovoltaic cells, which do not utilize PN junctions. Instead, chlorophyll is used to generate electricity by a power-generating mechanism of an electron-moving mechanism similar to the light-induced electron mobility mechanism.

    A dye-sensitized solar photovoltaic cell is a low-cost battery, which uses inorganic oxides and pigments such as titanium dioxide.

    The raw materials are cheaper than the metal, and the manufacturing method can be printed, which is relatively simple and does not require expensive equipment. The problem is that the photoelectric conversion efficiency of the dye-sensitized solar photovoltaic cell is too low, if the photoelectric conversion efficiency can reach 10%, then It is ideal.

    (2) According to the structure of the battery, it can be divided into two types of solar photovoltaic cells: block (sheet) or film. Block (slice) solar photovoltaic cells can be further divided into monocrystalline silicon solar photovoltaic cells, polycrystalline silicon solar photovoltaic cells and other block (sheet) solar photovoltaic cells. Thin film solar photovoltaic cells can be further divided into amorphous silicon solar photovoltaic cells and compound solar photovoltaic cells.

    There are several types of solar-powered photovoltaic cells. Does it help you? The batteries of solar lights also have their own advantages.Nuusolar manufactures high quality solar lighting products for you.