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ViewThe 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.
Several authoritative textbooks and review chapters are available as PDF samples or through institutional repositories: Physics of Organic Semiconductors | Wiley Online Books physics of organic semiconductors pdf
: Unlike the "band transport" in silicon, charges in organics typically "hop" between localized states due to structural disorder. Exciton Dynamics The highest occupied molecular orbital (HOMO) and lowest
Because these materials are often disordered or amorphous, charge transport is fundamentally different from the crystal-lattice flow in inorganic semiconductors. band gap in silicon, the HOMO-LUMO gap determines
Because organic semiconductors often lack intrinsic carriers (they are nearly intrinsic), injected charges dominate. The current-voltage characteristics are governed by the Mott-Gurney law for SCLC, rather than Ohm's law.
band gap in silicon, the HOMO-LUMO gap determines the material's electrical and optical properties. 2. Charge Transport Mechanisms