On practical charge injection at the metal/organic semiconductor interface

Akichika Kumatani, Yun Li, Peter Darmawan, Takeo Minari, Kazuhito Tsukagoshi

Research output: Contribution to journalArticlepeer-review

57 Citations (Scopus)


We have revealed practical charge injection at metal and organic semiconductor interface in organic field effect transistor configurations. We have developed a facile interface structure that consisted of double-layer electrodes in order to investigate the efficiency through contact metal dependence. The metal interlayer with few nanometers thickness between electrode and organic semiconductor drastically reduces the contact resistance at the interface. The improvement has clearly obtained when the interlayer is a metal with lower standard electrode potential of contact metals than large work function of the contact metals. The electrode potential also implies that the most dominant effect on the mechanism at the contact interface is induced by charge transfer. This mechanism represents a step forward towards understanding the fundamental physics of intrinsic charge injection in all organic devices.

Original languageEnglish
Article number1026
JournalScientific reports
Publication statusPublished - 2013

ASJC Scopus subject areas

  • General


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