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What is thin film power generation technology?
- May 17, 2018 -

What is thin film power generation technology? A few days ago, Hanergy’s thin-film power generation stock price “flooded”, and founder Li Hejun’s family instantly evaporated 116.7 billion Hong Kong dollars. The areas covered by Hanergy's thin film power generation have also attracted attention from the outside world.


To understand this concept, we must first understand the photovoltaic technology. The technology that directly converts solar energy into electrical energy is photovoltaic technology. It is a technology that uses the photovoltaic effect of the semiconductor interface to convert light energy directly into electrical energy.


The key component of photovoltaic power generation technology is solar cells. Currently, the main applications for photovoltaic power generation are based on semiconductor technology. Which can be subdivided into two kinds, one is the more traditional and more mature crystalline silicon battery, the other is a new generation of thin film batteries.


The traditional crystalline silicon battery is made of high-purity crystal silicon rods made of solar cells as raw materials. It is currently used very widely and maturely. Its structure and production technology have been established, and the products have been widely used in space and ground.


The thin film battery belongs to amorphous silicon structure, and its biggest difference from the crystalline silicon battery lies in its thickness, less than 1 μm, and the thickness of the silicon wafer is less than 1/100, which greatly reduces the manufacturing cost.


Amorphous silicon solar cells also have the advantages of very low manufacturing temperature (-200°C), ease of large-area spreading, and low light-emission, which makes them occupy a leading position in thin-film batteries.


Although thin-film batteries have many advantages, the disadvantages are also obvious. That is, the photoelectric conversion efficiency is low, and the area of the thin-film batteries required to convert the same amount of electric energy is huge, and there is no place to shop.


In addition, thin-film batteries also have the disadvantage of poor stability, and their energy conversion efficiency varies with the irradiation time, until hundreds or thousands of hours can stabilize.


At present, these two shortcomings are the biggest obstacles to the widespread use of thin film batteries.


Hanneng thin film power generation is specialized in thin film solar energy technology and has been laid out from the specific technology research and development to the industrial chain.


The APEC conference membrane power carport mentioned in the above figure uses Hanergy's solar thin film power generation technology to integrate high-efficiency thin-film power generation components in the roof of the carport, and the generated electricity can be used for lighting and other electricity needs to achieve the self-use of green electricity.


In addition, the solar thin-film power generation components laid on the roof of the carport also have a light-transmitting function to meet the lighting requirements of the interior of the building.


What is the status of thin film power generation technology in the world?


According to the report from the photovoltaic technology report of Fraunhofer ISE, in 2013, the market share of photovoltaic cells accounted for 9% of thin-film batteries, and 91% of all were crystalline silicon cells.


In May last year, the Japan Industrial Technology Research Institute announced that its research and development of organic thin-film solar cells has more than doubled the photoelectric conversion efficiency. The researchers said that through further research, it is expected to develop a conversion rate of 20% and can be put into practical use. Organic thin film battery.


As there has been a major breakthrough in the conversion rate, thin-film solar cells may further erode the market share of crystalline silicon solar cells.


What are the more advanced power generation technologies in the world?


The more advanced photovoltaic power generation technology can be called the third-generation photovoltaic power generation technology. The core is the introduction of modern optical technology, which is fundamentally different from the previous and second generations of semiconductor technology.


By using spotlight, the intensity of light is increased to increase power generation efficiency. At present, the conversion rate of monocrystalline silicon cells has reached 25%, and by concentrating it can use a monocrystalline silicon cell to emit “multiple” power.


However, the third-generation photovoltaic technology is still far from industrialization. The immature technology is on the one hand. On the other hand, the current one or two generations of photovoltaic power generation technology dominate the overwhelming role. The development of the third generation of photovoltaic technology is still lacking in importance.