Sulfur-doped graphene laminates for EMI shielding applications

Faisal Shahzad, Pradip Kumar, Seunggun Yu, Seunghwan Lee, Yoon Hyun Kim, Soon Man Hong, Chong Min Koo

Research output: Contribution to journalArticlepeer-review

66 Citations (Scopus)

Abstract

Herein, for the first time, we demonstrate that a laminated structure of sulfur-doped reduced graphene oxide (SrGO) provides significant potential for electromagnetic interference shielding applications. In this study, SrGO was prepared through the reaction between graphene oxide and hydrogen disulfide (H 2 S) gas at elevated temperatures. The doping degree of S was controlled through varying the time and temperature of the reaction and the maximum doping content of 5.6 wt% was achieved. Because of the n-type doping contribution of the S atom to the doped graphene, SrGO laminate not only revealed a 47% larger electrical conductivity (75 S cm -1 ) than undoped reduced graphene oxide laminate (51 S cm -1 ) but also revealed 119% larger EMI shielding effectiveness (33.2 dB) than the undoped one (15.5 dB) at the same sample thickness.

Original languageEnglish
Pages (from-to)9802-9810
Number of pages9
JournalJournal of Materials Chemistry C
Volume3
Issue number38
DOIs
Publication statusPublished - 2015 Aug 11
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Chemistry

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