How many types of batteries are used in solar lights?

At present, there are many kinds of materials that can produce solar photovoltaic cells, and the manufacturing methods are also different, so there are many types of solar photovoltaic cells. According to statistics, there are more than 100 kinds so far. Although there are so many types of Solar Panels photovoltaic cells, they can be classified according to the materials used or the construction of the cells.
(1) According to the materials used, it can be divided into two 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 and polycrystalline silicon solar photovoltaic cells.
Polycrystalline silicon solar photovoltaic cells can be further divided into cast multi-product silicon solar photovoltaic cells, ribbon polycrystalline silicon solar photovoltaic cells and thin film polycrystalline silicon solar photovoltaic cells.
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.
Among the many solar photovoltaic cells, silicon solar photovoltaic cells are the messengers, although it is not the earliest discovered. But it is the earliest developed, and by far the most productive category.
The initial solar photovoltaic cells were only monocrystalline silicon solar photovoltaic cells. Today, there are not only single product, polycrystalline silicon, non-product solar photovoltaic cells, but also thin-film solar photovoltaic cells. Initially, the photoelectric conversion efficiency of silicon solar photovoltaic cells was very low. , only 6%, and the cost is also very high, more than 1,000 times higher than conventional electricity, it cannot be widely used at all, and can only be used for those satellites and spacecraft that are not sensitive to cost.
(2) According to the structure of the battery, it can be roughly divided into two types of solar photovoltaic cells: block (sheet) or thin film. Block (sheet) 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.