Physics Of Organic Semiconductors Pdf [patched] -

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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. physics of organic semiconductors pdf

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Electronic transitions happen much faster than nuclear motion. This results in a "vertical transition" on a potential energy diagram. physics of organic semiconductors pdf