Physics Of Organic Semiconductors Pdf [top] -

In inorganic crystals, charges move as delocalized waves through periodic energy bands (band transport). In organic solids, the weak Van der Waals interactions create significant structural disorder, altering how charges move.

[ OLED: Light Emission ] [ OPV: Light Harvesting ] Metal Cathode (e- inj) Metal Cathode (e- coll) │ ▲ ▼ │ ┌──────────────────────┐ ┌──────────────────────┐ │ Electron Transport │ │ Acceptor (LUMO) │ ├──────────────────────┤ ├──────────────────────┤ │ Emissive Layer (S1) │ │ Donor/Acceptor D-A │ Exciton │ [Singlet Radiative] │ │ Heterojunction │ Dissociation ├──────────────────────┤ ├──────────────────────┤ │ Hole Transport │ │ Donor (HOMO) │ └──────────────────────┘ └──────────────────────┘ ▲ │ │ ▼ ITO Anode (h+ inj) ITO Anode (h+ coll) Organic Light-Emitting Diodes (OLEDs) physics of organic semiconductors pdf

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To generate electricity in a solar cell, this exciton must be "broken" at an interface (the Donor-Acceptor interface) to create free charges. 4. Key Applications in Modern Tech In inorganic crystals, charges move as delocalized waves