Beyond Silicon: The "Soft" Physics of Organic Semiconductors šā”
Energetic Disorder: The variation in energy levels between neighboring molecules. Transfer Integral: How well the -orbitals of adjacent molecules overlap. physics of organic semiconductors pdf
4. Charge Injection and Contacts The interface between metal electrodes and the organic active layer is governed by the work function of the metal and the ionization potential or electron affinity of the organic material. Ideally, Ohmic contacts are formed when the metal work function aligns with the transport levels. However, "Fermi level pinning" often occurs due to interfacial states, creating Schottky barriers that impede current flow. To overcome this, device engineering often utilizes interlayers to facilitate charge tunneling or to modify the effective work function of the electrode. Beyond Silicon: The "Soft" Physics of Organic Semiconductors