Figure 2 | Working principle of solar cell based in semiconductor bulk and nanocrystals (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2 | Working principle of solar cell based in semiconductor bulk and nanocrystals

Caption

In bulk, excitation by light creates charges (electron and hole), which diffuse to their respective electrodes to be extracted as electric current. In nanocrystals, excitation by light creates excitons, which travel via energy transfer. The excitons dissociate at the electrodes and extracted as electric current.

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by Tze Chien Sum

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