Organic Semiconductor Crystals
Organic crystalline semiconductors are aromatic hydrocarbon compounds which contain benzene ring structures composed of carbon and hydrogen atoms. Examples of these are pentacene, rubrene and perylene. The semiconducting properties of the organic materials depend on the bandgap of the material and arise from the movement of electron and holes by tunneling and phonon-assisted hopping.
Organic crystalline semiconductors can be used as direct fast-neutron detectors due to the charge signal that is created by scattering of fast-neutrons with the hydrogen atoms present in the material. At RMD we are working on several of these organic crystalline semiconductors including perylene. A photograph of a perylene semiconductor device is shown to the left.
A photograph of a perylene semiconductor device.