Energy-rich electron-hole pairs

Understand how energy-rich electron-hole pairs can be utilised to produce electricity in photovoltaic solar cells, to drive chemical reactions where water is split into hydrogen and oxygen, to take part in photocatalytic reactions and to change the surface of the semiconductor, resulting in the phenomenon of superhydrophilicity. 

The generation of energy-rich electron-hole pairs has been utilised to ... 

The minute network structure of microporous silicon is between the two extremes of a single atom and a large crystal. A crystallite of a few hundred silicon atoms is large enough to have a rich electronic band structure but is still small enough to show an increase in the energy of an electron-hole pair (exciton) due to... 

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