The highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) are the two key molecular orbitals that determine the electronic properties of organic semiconductors. The HOMO and LUMO levels are often referred to as the "frontier orbitals" because they play a crucial role in determining the electronic transport and optical properties of organic semiconductors.
Organic semiconductors have gained significant attention in recent years due to their potential applications in various electronic devices, such as organic light-emitting diodes (OLEDs), organic photovoltaic cells (OPVs), and organic field-effect transistors (OFETs). The physics of organic semiconductors is a complex and multidisciplinary field that involves the study of the electronic and optical properties of organic materials. In this article, we will provide a comprehensive review of the physics of organic semiconductors, including their electronic structure, charge transport, and optical properties. physics of organic semiconductors pdf
Organic semiconductors exhibit a range of interesting optical properties, including fluorescence, phosphorescence, and electroluminescence. The optical properties of organic semiconductors are determined by the excited states of the molecules or polymer chains, which can be described using a combination of experimental and theoretical techniques. The highest occupied molecular orbital (HOMO) and lowest