Amorphous silicon photovoltaic, the characteristics

With the term "amorphous solar”Describes the photovoltaic technology based onamorphous silicon(Be). There are various materials suitable for transforming solar radiation into electricity but those used on a large scale are very few. These include theamorphous siliconand silicon in crystalline form (Si-c).

Theamorphous solaris more effective than photovoltaics with crystalline silicon technology for various factors, including the thermal coefficient which for crystalline silicon is very high, more than double compared toamorphous silicon. This means that at high temperatures, the efficiency of crystalline silicon is greatly reduced compared to that ofamorphous solar.

Cells in amorphous silicon (Si-a) are on average more efficient (from 25 to 40%) with incident powers lower than 300 W / m2. The performance degradation of theamorphous siliconmust never exceed 20% in the first 20 years of operation of thephotovoltaic system.

Characteristics of theamorphous solar:

  • Low temperature coefficient
  • Suitable for areas with low level of solar radiation (it has good yields even in the early morning hours and with cloudy skies)
  • Its aesthetic aspect makes it easy to integrate into buildings (in the photo at the top left there are photovoltaic modules with silicon-based technologyamorphous, on the right are the poly and monocrystalline modules, characterized by small square cells).
  • With theamorphous solarthe use of glass is not necessary.

Amorphous solarfrom an environmental point of view:
Everything has an energy cost to nature, even the photovoltaic! To return the energy used for its production, amorphous solar takes 2-3 years, compared to the 3-6 years required by photovoltaic technology based on multi- and mono-crystalline silicon. Thus, if a photovoltaic panel alamorphous siliconduring its life it returns approximately 10, 12 times the energy used for its production, the crystalline silicon photovoltaic panel produces only 4 to 8 times the energy produced compared to the amount used to build them.

Video: Thin film solar cells: amorphous silicon, CdTe, CIGS and organic cells (October 2021).