We continue to develop resources related to the COVID-19 pandemic. See COVID-19 initiatives on Appropedia for more information.
Amorphous silicon solar cell
|Description||Amorphous silicon is a non-crystalline allotropic form of silicon that is bonded tetrahedrally. Amorphous silicon is a solar cell technology that has a high absorption coefficient but these solar cells can be instable when light hits the material.|
|Intended use||Solar cells, Solar energy, Renewable energy|
|Keywords||Amorphous silicon, a-Si, solar cell, solar energy, crystalline, bond, lattice, absorption coefficient, ecological balance sheet, instable|
|Appropedia user||User: Garymiller|
|Project was made|
|Date of publication||2007-11-16|
|Countries of design|
|Main materials||Amorphour silicon, a-Si|
|SDG||Sustainable Development Goal 7, Sustainable Development Goal 9, Sustainable Development Goal 13|
Amorphous Silicon Material
Amorphous silicon (a-Si) is the non-crystalline allotropic form of silicon. Silicon is a four-fold coordinated atom that is normally tetrahedrally bonded to four neighboring silicon atoms. In crystalline silicon this tetrahedral structure is continued over a large range, forming a well-ordered lattice (crystal).
Amorphous Silicon Solar Cells
Some of the advantages of an amorphous silicon solar cell are that they have high absorption coefficient so that you do not need a lot of material to do absorb sunlight. It is a lot cheaper than the glass, metal or plastic that you deposit it on. And it also has an excellent ecological balance sheet. Although many good things come from this, there is also some down falls to amorphous silicon solar cells. They are instable because it will generate defects states when the light hits the material. It is only 7-10% efficient when moderately stabilized.