A window for trap-free charge transport in organic semiconductors
(PHYSorg.com Chemistry)

Organic semiconductors, a class of carbon-based materials with optical and electronic properties, are now commonly used to fabricate a variety of devices, including solar cells, light-emitting diodes and field-effect transistors. These semiconducting materials can exhibit a characteristic known as highly unipolar charge transport, which essentially means that they predominantly conduct either electrons or holes. This can be somewhat problematic, as it hinders their efficiency and performance.