solar cell
Device used to convert solar energy directly into electric energy (photovoltaic effect).
solar radiation 
All the electromagnetic waves emitted by the Sun.
antireflection coating 
Coating product that is deposited on the negative region to reduce light reflection and optimize solar radiation absorption.
negative region 
Layer of semiconductive material (silicon) to which phosphorous is added to release electrons.
positive region 
Layer of semiconductive material (silicon) to which boron is added to produce a layer with insufficient electrons.
positive/negative junction 
Contact area in which electrons are exchanged between two layers to create an electric current; radiation moves the charges between these regions to create voltage.