Tuning the work function of graphene by nitrogen plasma treatment with different radio-frequency powers

Jian Jhou Zeng, Yow Jon Lin

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Graphene prepared by the chemical vapor deposition method was treated with nitrogen plasma under different radio-frequency (rf) power conditions in order to experimentally study the change in the work function. Control of the rf power could change the work function of graphene from 4.91 eV to 4.37 eV. It is shown that the increased rf power may lead to the increased number of graphitic nitrogen, increasing the electron concentration, and shifting the Fermi level to higher energy. The ability to controllably tune the work function of graphene is essential for optimizing the efficiency of optoelectronic and electronic devices.

Original languageEnglish
Article number233103
JournalApplied Physics Letters
Volume104
Issue number23
DOIs
Publication statusPublished - 2014 Jun 9

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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