Light absorption in OSCs produces an exciton —a bound electron-hole pair rather than free charge carriers.
. This leads to soft materials with lower melting points and narrower energy bands. Deutsche Nationalbibliothek Charge Transport Mechanisms physics of organic semiconductors pdf
The Physics of Organic Semiconductors: Principles, Transport, and Device Applications Light absorption in OSCs produces an exciton —a
While the Brütting and Adachi book is the definitive text, several other excellent resources exist for those seeking a PDF on the physics of organic semiconductors. When a charge is added to a molecule,
Holes are injected into the HOMO from an anode, and electrons are injected into the LUMO from a cathode. The carriers hop through the organic layers under an applied electric field, meet, form excitons, and radiatively decay to emit light.
When a charge is added to a molecule, it distorts the surrounding molecular structure. This combination of a charge and its induced lattice distortion is called a polaron.