Tuning the work function of graphene by ultraviolet irradiation

Yow Jon Lin, Jian Jhou Zeng

研究成果: Article同行評審

36 引文 斯高帕斯(Scopus)


Graphene layers grown by chemical vapor deposition were, respectively, irradiated for 0, 20, 40, and 60 min by an ultraviolet light source in order to experimentally study the change in the work function of graphene. The dependences of the work function and carrier concentration upon ultraviolet irradiation have been found. It is shown that ultraviolet irradiation may lead to oxygen desorption, thus reducing the hole density and work function of graphene. Based on the well-known expression for the Fermi energy of Dirac fermions, the Fermi velocity of graphene was extracted to be about 5.2 × 105 m/s.

期刊Applied Physics Letters
出版狀態Published - 2013 五月 6

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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