Utilizing radiative recombination of singlets and triplets to produce light.
The energy difference between HOMO and LUMO, typically ranging from 1.5 to 3.0 eV. 2. Charge Transport: Hopping vs. Band Transport physics of organic semiconductors pdf
Used in flexible backplanes for displays and electronic "skin." these excitons are usually "Frenkel-type
In organics, these excitons are usually "Frenkel-type," meaning they are localized on a single molecule. physics of organic semiconductors pdf
For a quick : Start with the review "Electronic Processes in Organic Semiconductors" by Köhler & Bässler (Wiley, 2015) – also available in PDF form through institutional access.
In silicon, charge carriers move like waves through a nearly perfect crystal (Band Theory). In organic materials, the physics is much "messier" due to structural disorder.