Electronic transitions happen much faster than nuclear motion. This results in a "vertical transition" on a potential energy diagram.
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Carbon atoms in a conjugated molecule alternate single and double bonds. This overlap of p-orbitals creates a delocalized cloud of π-electrons above and below the molecular plane. It is these π-electrons that are responsible for electronic transport. physics of organic semiconductors pdf
Key difference: In inorganic crystals (like Si), charge carriers move freely in extended Bloch states. In organics, the molecules retain their individual identity. Electrons do not move freely through a sea of atoms; they hop from one localized molecular orbital to the next. This "hopping transport" is the cornerstone of organic semiconductor physics. Carbon atoms in a conjugated molecule alternate single
This is the central physics challenge in organic electronics. prioritize these locations: Important relations:
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