Unlike Wannier-Mott excitons in silicon, organic excitons are "Frenkel-type," meaning they are localized on a single molecule and have high binding energies (0.1–1.0 eV).
This fundamental structural difference leads to the core principle of organic semiconductor physics: . physics of organic semiconductors pdf
The Physics of Organic Semiconductors: Principles and Mechanisms Unlike Wannier-Mott excitons in silicon
Understanding these physical principles has enabled the development of: Dominating the smartphone and premium TV market. organic excitons are "Frenkel-type
In inorganic semiconductors like silicon, atoms are held together by strong, directional covalent bonds, forming a perfect crystalline lattice. Electrons delocalize across the entire crystal, forming wide energy bands.
In organic solids, charge transport is fundamentally different from the "band transport" seen in inorganic crystals.