Physics Of Organic Semiconductors Pdf [upd] Review

Inorganic (Wannier-Mott) Organic (Frenkel) Low binding energy High binding energy Large radius Localized to one molecule [ Hole ] . . . . . [ Electron ] [ Hole / Electron ] Frenkel Excitons

In amorphous or highly disordered polymer films, energy states are localized on individual molecular segments. Charges move via , commonly modeled as hopping . The charge mobility ( ) in these systems is highly dependent on temperature ( ) and electric field ( physics of organic semiconductors pdf

: When a charge moves, it often distorts the surrounding organic molecule, creating a "polaron"—a combination of the charge and its associated lattice distortion. Charges move via , commonly modeled as hopping

The weak intermolecular forces lead to a high degree of structural and energetic disorder, especially in thin films. Instead of the neat, periodic energy bands found in a silicon crystal, the electronic states in an organic semiconductor are more accurately represented by a . This distribution is broadened by static disorder—variations in molecular spacing and orientation—as well as dynamic disorder from thermal molecular vibrations. This "Gaussian landscape" is the stage upon which the key physical processes of charge transport and photophysics play out. They consist of

Finding the PDF is only the first step. The physics of organic semiconductors is notoriously interdisciplinary. Here is a study strategy:

Unlike covalent inorganic crystals, organic semiconductors are held together by weak . They consist of