Copper indium gallium selenide solar cell information
CIGS cell on a flexible plastic backing. Other architectures use rigid CIGS panels sandwiched between two panes of glass.
A copper indium gallium selenide solar cell (or CIGS cell, sometimes CI(G)S or CIS cell) is a thin-film solar cell used to convert sunlight into electric power. It is manufactured by depositing a thin layer of copper indium gallium selenide solid solution on glass or plastic backing, along with electrodes on the front and back to collect current. Because the material has a high absorption coefficient and strongly absorbs sunlight, a much thinner film is required than of other semiconductor materials.
CIGS is one of three mainstream thin-film photovoltaic (PV) technologies, the other two being cadmium telluride and amorphous silicon. Like these materials, CIGS layers are thin enough to be flexible, allowing them to be deposited on flexible substrates. However, as all of these technologies normally use high-temperature deposition techniques, the best performance normally comes from cells deposited on glass, even though advances in low-temperature deposition of CIGS cells have erased much of this performance difference. CIGS outperforms polysilicon at the cell level, however its module efficiency is still lower, due to a less mature upscaling.[1]
Thin-film market share is stagnated at around 15 percent, leaving the rest of the PV market to conventional solar cells made of crystalline silicon. In 2013, the market share of CIGS alone was about 2 percent and all thin-film technologies combined fell below 10 percent.[2] CIGS cells continue being developed, as they promise to reach silicon-like efficiencies, while maintaining their low costs, as is typical for thin-film technology.[3] Prominent manufacturers of CIGS photovoltaics were the now-bankrupt companies Nanosolar and Solyndra. Current market leader is the Japanese company Solar Frontier, with Global Solar and GSHK Solar also producing solar modules free of any heavy metals such as cadmium and/or lead.[4] Many CIGS solar panel manufacturer companies have gone bankrupt.[5]
^Green, Martin A., et al. "Solar cell efficiency tables (version 50)." Progress in Photovoltaics: Research and Applications 25.7 (2017): 668-676.
^"Photovoltaics Report, Fraunhofer ISE, July 28, 2014, pages 18,19" (PDF).
^Andorka, Frank (2014-01-08). "CIGS Solar Cells, Simplified". www.solarpowerworldonline.com/. Solar Power World. Archived from the original on 19 August 2014. Retrieved 16 August 2014.
^"CIS – Ecology". Solar Frontier. Retrieved 8 July 2015.
^"TSMC Shutting Down Its CIGS Thin-Film Solar Manufacturing". www.greentechmedia.com.
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