What is the work content of the general worker in the solar energy factory?

Laser slicing, female workers, cleaning, just three actions.

Welded parts? Soldering is usually done by men, and arranging films is done by women workers.

Semi-finished product inspection? It's also very simple. Put the board on the instrument and simulate the sun to see if the power, voltage and current can meet the requirements.

Lamination? A woman's job is to set the EVA pet bottom battery. The man wants to push dozens of kilograms of solar panels onto the laminator.

Packaging? Like all factories.

Women workers are very clear about their jobs, and men are also very relaxed. Basically they all work in air-conditioned rooms.

It belongs to handyman.

Monocrystalline silicon and polycrystalline silicon also play a great role in the utilization of solar energy. Although at present, in order to make solar power generation have a bigger market and be accepted by consumers, it is necessary to improve the photoelectric conversion efficiency of solar cells and reduce the production cost. From the current development history of international solar cells, it can be seen that their development trends are monocrystalline silicon, polycrystalline silicon, ribbon silicon and thin film materials (including microcrystalline silicon-based films, compound-based films and dye films). From the perspective of industrialization development, the focus is developing from single crystal to polysilicon and thin film, the main reasons are as follows; [1] There are fewer and fewer head and tail materials available for solar cells; [2] For solar cells, the square substrate is more cost-effective, and the square material can be directly obtained by casting polysilicon which is directly solidified; [3] Polycrystalline silicon production technology has been continuously improved. The fully automatic casting furnace can produce more than 200 kilograms of silicon ingots per production cycle (50 hours), and the grain size reaches centimeter level; [4] Due to the rapid development of monocrystalline silicon technology in recent ten years, this technology has also been applied to the production of polycrystalline silicon batteries, such as selective etching of emitter junction, back field, textured etching, surface and bulk passivation, fine metal gate electrode and so on. Using screen printing technology can reduce the width of gate electrode to 50 microns, and the height can reach more than 65438 05 microns. Using rapid thermal annealing technology to produce polysilicon can greatly shorten the process time. The thermal process time of a single chip can be completed in one minute, and the battery conversion efficiency made by this process on a piece of polysilicon chip with 100 square centimeter exceeds 14%. It is reported that the efficiency of the battery fabricated on the 50 ~ 60 micron polysilicon substrate currently exceeds 16%. Using mechanical slotting and screen printing technology, the efficiency of 65,438+000 square centimeters polycrystalline body exceeds 65,438+07%, and the efficiency without mechanical slotting is 65,438+06% in the same area. Using the buried gate structure, the battery efficiency of mechanically slotting on a polycrystalline body of 65,438+030 cm 2 is 65,438+05.8%. (1) monocrystalline silicon solar cell

At present, the photoelectric conversion efficiency of monocrystalline silicon solar cells is about 15%, and the highest is 24%, which is the highest among all kinds of solar cells at present, but the manufacturing cost is too high to be widely used. Because monocrystalline silicon is generally encapsulated by tempered glass and waterproof resin, it is durable, and its service life can generally reach 15 years, and the highest can reach 25 years.

Polycrystalline silicon solar cells.

The manufacturing process of polysilicon solar cells is similar to that of monocrystalline silicon solar cells, but the photoelectric conversion efficiency of polysilicon solar cells is much lower, and its photoelectric conversion efficiency is about 12% (the world's most efficient polysilicon solar cell 14.8% was listed in Sharp, Japan on July 1 2004). In terms of manufacturing cost, it is cheaper than monocrystalline silicon solar cells, with simple material manufacturing, electricity saving and lower total production cost, so it has been greatly developed. In addition, the service life of polycrystalline silicon solar cells is shorter than that of monocrystalline silicon solar cells. In terms of cost performance, monocrystalline silicon solar cells are slightly better.

Amorphous silicon solar cells (thin film solar cells).

Amorphous silicon solar cell is a new thin-film solar cell appearing in 1976. Its manufacturing method is completely different from monocrystalline silicon and polycrystalline silicon solar cells, which greatly simplifies the technological process, consumes less silicon materials and consumes less electricity. Its main advantage is that it can generate electricity in weak light. However, the main problem of amorphous silicon solar cells is the low photoelectric conversion efficiency. At present, the international advanced level 10% is not stable enough. As time goes on, its conversion efficiency decreases.

Multi-compound solar cells.

Multicomponent solar cells refer to solar cells that are not made of single-element semiconductor materials. At present, there are many kinds of research in various countries, most of which have not been industrialized, mainly including the following:

A) cadmium sulfide solar cell

B) gallium arsenide solar cell

C) copper indium selenium solar cell (new multi-element band gap gradient copper (indium gallium) selenium thin film solar cell)

Cu(In, Ga)Se2 is a kind of solar energy absorption material with excellent performance, and it is a multi-component semiconductor material with gradient band gap (energy level difference between conduction band and valence band), which can expand the solar energy absorption spectrum range and further improve the photoelectric conversion efficiency. On this basis, thin-film solar cells with higher photoelectric conversion efficiency than silicon thin-film solar cells can be designed. The achievable photoelectric conversion rate is 18%, and so far, this kind of thin-film solar cell has not found the performance degradation effect (SWE) caused by light radiation, and its photoelectric conversion efficiency is about 50~75% higher than that of the current commercial thin-film solar panels, which is the highest level in the world.