Glossary
Organic solar cells : materials, nano-morphology and device engineering

Comonomer; comonomer

Molecule used as a repeating unit in a copolymer. A copolymer is made up of at least two comonomers.

Heterojunction; heterojunction

In this context, a heterojunction is the juxtaposition of two materials of different chemical composition.

power conversion efficiency

The conversion efficiency of a photovoltaic cell is often expressed in %. It represents the proportion of energy delivered by the sun that is converted into electrical energy. A conversion efficiency of 20% means that the photovoltaic cell can convert 1/5th of the sun's energy into electrical energy. The reference solar spectrum in temperate regions is also known. It's called AM1.5G and corresponds to a zenith distance of 48.2°. The "G" stands for "global", as this spectrum takes into account both direct solar radiation and radiation scattered by the sky. The irradiance corresponding...