Optical signature of charge transfer in n-type carbon nanotube transistors doped with printable organic molecules

Ryo Shimizu, Satoki Matsuzaki, Kazuhiro Yanagi, Taishi Takenobu

    Research output: Contribution to journalArticle

    4 Citations (Scopus)


    Single-walled carbon nanotubes (SWCNTs) are known to be p-type semiconductors, due to unintentional hole doping. Therefore, air-stable electron dopants are important for the fabrication of logic circuits. Recently, n-type characteristics of SWCNT film transistors have been achieved by using several types of donative organic molecules, and these molecular dopants have opened a route for application. However, it is still unclear whether the cause of n-type operation is the Fermi level shift of SWCNTs or the lowering of the Schottky barrier for electrons. In this study, we found the evidences of electron transfer from organic molecules to SWCNTs using optical measurements.

    Original languageEnglish
    Article number125102
    JournalApplied Physics Express
    Issue number12
    Publication statusPublished - 2012 Dec


    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

    Cite this