Ryoma Hayakawa, Principal Researcher, Yutaka Wakayama, Group Leader of Quantum Device Engineering Group have succeeded in visualization of conductive electrons in an organic transistor.
Organic p–n junction transistors show markedly large negative resistances even at room temperature. They clarified the origin of negative resistance using photoemission electron microscopy. They found that a steep potential gradient at the lateral p–n interface enhanced the electron conduction. In contrast, the conduction was suppressed when n-type or p-type semiconductor layer was completely depleted.

This achievement was made by a collaborative work between NIMS, University of Tsukuba and KEK.

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