Photovoltaics - The development and production

Photovoltaics - The development and production

Photovoltaics - The development and production

Photovoltaics - The development and production:

H photovoltaic energy production is a technology that directly converts light energy into electrical energy using the photovoltaic effect of the semiconductor interface. It mainly consists of solar panels (components), εreaders and converters, and the main components consist of electronic components. After solar cells are connected in series, they can be packaged and protected to form a large-area solar cell module, and then combined with power controllers and other components to form a photovoltaic power generation device.

Photovoltaics - The development and production

Photovoltaics - The development and production

In 2011, the new installed capacity photovoltaic in the world was about 27,5 GW, an increase of 52% compared to 18,1 GW in the previous year, and the global cumulative installed capacity exceeded 67 GW. Of the total installed capacity of almost 28 GW in the world, almost 20 GW of systems are being installed in Europe, but the growth rate is relatively slow The Italian and German markets account for 55% of the global installed capacity increase, 7,6 GW and 7,5 GW respectively. In 2011, the PV industry market demand in the Asia Pacific region represented by China, Japan and India increased by 129% year-on-year and its installed capacity was 2,2 GW, 1,1 GW and 350 MW respectively. Additionally, in the increasingly mature North American market, newly installed capacity is approximately 2,1 GW, an increase of 84%.

Among them, China is the country with the world's fastest growing photovoltaic power generation facilities. The photovoltaic power generation facilities in 2011 increased by about 5 times compared to 2010. In 2011, the battery output reached 20 GW, accounting for about 65% of the world. By the end of 2011, there were about 115 battery companies in China, with a total capacity of about 36,5 GW. Among them, there are 14 companies with a production capacity of more than 1GW, accounting for 53% of the total production capacity; 63 companies with a production capacity between 100MW and 1GW, accounting for 43% of the total production capacity; the remaining 38 companies have production capacity capacity less than 100 MW, representing only the national total.4% of the capacity. The differentiated pattern of scale, technology and cost competition has gradually become clear. Shipments by the top ten domestic module manufacturers accounted for 60% of total battery production.
In the next ten years, China's PV power generation market will shift from stand-alone power generation systems to grid-connected power generation systems, including desert power plants and urban rooftop power generation systems. China's solar PV plants have huge potential. With active and stable political support, by 2030, the installed PV capacity will reach 100 million kilowatts and the annual power generation capacity will reach 130 million megawatt hours, which is equivalent to less than 30 large – coal-fired power plants. The country will invest 20 billion yuan to subsidize the photovoltaic industry in the next three years China's solar photovoltaic power production has ushered in a new round of rapid growth and has attracted more strategic investors to integrate into this industry.
Its main principle energy production from photovoltaics is the photoelectric effect of semiconductors. When a photon irradiates a metal, its energy can be completely absorbed by an electron in the metal, and the energy absorbed by the electron is large enough to overcome the Coulomb force inside the metal atom to do work, escape from the surface of the metal and become a photoelectron. A silicon atom has 4 outer electrons. If pure silicon is doped with an atom with 5 outer electrons, such as a phosphorus atom, it becomes an N-type semiconductor. If pure silicon is doped with an atom with 3 outer electrons, such as Boron atoms, forming a P-type semiconductor. When P-type and N-type combine, a potential difference is formed on the contact surface, which turns into a solar cell. When sunlight hits the PN junction, current flows from the P-type side to the N-type side, forming a current.
The photoelectric effect is an important and magical phenomenon in physics. Under the radiation of electromagnetic waves higher than a certain frequency (the frequency is called the threshold frequency), the electrons in certain substances absorb energy and escape to form an electric current, that is, photoelectricity.
New Photovoltaic technology
Principles and advantages of photovoltaic energy

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Photovoltaics - The development and production,

Photovoltaics - The development and production,

Photovoltaics- Development and production, electricity, main components, photoelectric effect

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