see "photovoltaic/photovoltaic effect", 3.1.43d)
a) back-surface field effect
effect where the charge carriers generated near the back side of a PV cell are collected effectively by the inner electric field that is formed by a heavily doped zone near the rear electrode
b) light-confinement effect
effect where the short-circuit electric current is increased by trapping incident light inside a PV cell using textured surfaces and structures, etc |