Energy from light – Plants and solar cells © Siemens Stiftung 2020 CC BY-SA 4.0 international

Energy from light – Plants and solar cells

Interactive

Schematic diagram:
Energy conversion in a leaf (photosynthesis), a dye-sensitized solar cell, and a silicon solar cell is compared.

English, German
Interactive (1.0 MByte)
2021-06-25
The similarity of photosynthesis and a solar cell is that light (radiant energy) excites electrons. The differences lie in the absorbing material: In photosynthesis, this is the leaf pigment chlorophyll; in a dye-sensitized solar cell, this is anthocyanins; and in a silicon solar cell, this is doped semiconductors. In photosynthesis, the electron excitation results in the conversion of radiant energy to chemical energy, ultimately in the form of sugar, and in solar cells, in the conversion to electrical energy (flow of current).
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Interactive graphic
Biology; Chemistry; Physics; Technology
Grade 5 to 6; Grade 7 to 9; Grade 10 to 13
Middle/high school
Electrical circuit; Semiconductor; Solar energy
Siemens Stiftung Media Portal
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© Siemens Stiftung 2020
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