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Thin film solar power generation
- May 18, 2018 -

Thin-film solar power generation has a wide range of applications and is loved by architects. Thin-film solar cells can be manufactured using inexpensive substrates such as ceramics, graphite, and metal plates. The thickness of the thin film that can generate voltages is only a few μm. The current conversion efficiency can be as high as 13%. In addition to the flat surface, the thin-film solar battery has a wide range of application because it can be made into a non-planar structure and can be combined with a building or become a part of a building.


Thin-film solar cells can be manufactured using inexpensive substrates such as glass, plastics, ceramics, graphite, and metal sheets. The thickness of a thin film that can generate voltages is only a few μm, so it can be compared with silicon under the same light-receiving area. Circular solar cells significantly reduce the amount of raw materials used (thickness can be less than 90% of silicon wafer solar cells), the current laboratory conversion efficiency has reached 20% or more, and the maximum stable mass production efficiency of about 13%. In addition to the flat surface, the thin-film solar cell is also flexible because it can be made into a non-planar structure and has a wide range of applications. It can be combined with a building or become a part of a building. In the manufacture of thin-film solar cells, Various types of deposition techniques are used to layer p-type or n-type layers one by one. Common thin-film solar cells include amorphous silicon, CuInSe2 (CIS), and CuInGaSe2 (CIGS). And CdTe.. and so on.


Thin Film Solar Cell Features

1. Less power loss in the same masked area (good power generation under low light conditions)

2. Loss of power at the same illuminance as compared to wafer solar cells

3. Better power temperature coefficient

4. Better light transmission

5. Higher cumulative power generation

6. Only a small amount of silicon raw material

7. There is no internal circuit short-circuit problem (online has been built in the series battery manufacturing)

8. Thicker than wafer solar cells

9. Material supply without concern

10. Can be integrated with building materials (BIPV)


The foldable thin film solar cell is a thin film solar cell fabricated using amorphous silicon combined PIN photodiode technology. This series of products are soft and portable, durable, high photoelectric conversion efficiency; can be widely used in consumer electronics, remote monitoring / communications, military, field / indoor power supply and other fields.

Organic thin-film solar cells use plastic and other light and flexible materials as the substrate, so people are looking forward to its practical application. Researchers said that through further research, it is expected to develop an organic thin-film solar cell with a conversion rate of 20% that can be put into practical use. Experts believe that thin-film solar cells will significantly reduce costs in the next five years, when the thin-film solar cells will be widely used in watches, calculators, curtains and even clothing.

As a kind of clean energy, solar power has been more and more accepted and accepted by ordinary people. What kind of working principle is it?


Solar light shines on the p-n junction of the semiconductor to form a new hole-electron pair. Under the action of the p-n junction electric field, holes flow from the n region to the p region, and electrons flow from the p region to the n region. After the circuit is turned on, a current is formed. This is the working principle of the photoelectric effect solar cell. Solar power generation There are two methods for solar power generation. One is the light-heat-electric conversion method, and the other is the light-electricity direct conversion method. Solar cell classification

Solar cells can be classified into two types: crystalline thin film type and non-crystalline thin film type (hereinafter abbreviated as a-) in the crystalline state, while the former is further divided into monocrystalline crystalline forms and polycrystalline forms. According to the material, it can be divided into a silicon thin film shape, a compound semiconductor thin film shape, and an organic film shape, and the compound semiconductor thin film shape is further divided into amorphous shapes (a-Si:H, a-Si:H:F, a-SixGel-x: H, etc.), IIIV (GaAs, InP, etc.), IIVI (Cds), and zinc phosphide (Zn 3 p 2). Solar cells According to the different materials used, solar cells can be divided into: silicon solar cells, multiple compound thin film solar cells, polymer multilayer modified electrode solar cells, and nanocrystalline solar cells. Among them, silicon solar cells are the current development. The most mature, dominant in the application.


Silicon solar cell

Silicon solar cells are classified into three types: monocrystalline silicon solar cells, polysilicon thin film solar cells, and amorphous silicon thin film solar cells.

(2) Multi-element compound thin film solar cells, multi-element compound thin film solar cells are inorganic salts, which mainly include gallium arsenide III-V compounds, cadmium sulfide, cadmium sulfide, and copper tellurium selenide thin film batteries.

(3) Polymer multilayer modified electrode solar cells

The replacement of inorganic materials with organic polymers is just the beginning of a research direction of solar cell manufacturing. Due to the flexibility of organic materials, easy production, wide source of materials, and cost advantages, it is of great significance for the large-scale use of solar energy and the provision of low-cost electric energy. However, the research on the preparation of solar cells with organic materials has only just begun. Both the service life and the cell efficiency cannot be compared with inorganic materials, especially silicon cells. Whether it can develop into a product with practical significance still needs further research and exploration.

(4) Nanocrystalline solar cells

Nanocrystalline TiO2 crystal chemical energy solar cells are newly developed. The advantages lie in their low cost, simple process and stable performance. Its photovoltaic efficiency is stable at more than 10%, and the production cost is only 1/5 to 1/10 of silicon solar cells. Life can reach more than 20 years.