Linked from
The 23 pages that link to Solar cell, each with the reason it gives.
PhotonBroader topic: Absorbed photons create charge carriers that can drive current.
P–n junctionBroader topic: Its junction separates photogenerated carriers to produce usable current.
Electron–hole pairBroader topic: It separates light-generated pairs before they recombine.
Solar energyBroader topic: It is the basic electricity-generating unit in photovoltaic systems.
OptoelectronicsBroader topic: It applies optoelectronic conversion to electricity generation.