For decades, the world of electronics was dominated by the rigid, crystalline lattice of inorganic materials like silicon and gallium arsenide. However, a quiet revolution has been underway in laboratories around the globe. Organic semiconductors—carbon-based polymers and small molecules—have emerged as a viable, and in many cases superior, alternative for next-generation optoelectronic devices.
Charge Transport Mechanisms
from the Methodist College of Engineering and Technology provide a solid foundation in general theory. physics of organic semiconductors pdf
3. Excitons and Optical Properties When an OSC absorbs a photon, it creates an exciton—a bound electron-hole pair. In inorganic semiconductors, the high dielectric constant ($\varepsilon_r$) screens the Coulomb attraction, resulting in Wannier-Mott excitons with large radii and low binding energy ($\sim$ meV), which dissociate easily at room temperature. Unlocking the Electronic World: A Comprehensive Guide to
Frenkel Excitons: Common in organics, these are tightly bound to a single molecule. Charge Transport Mechanisms from the Methodist College of