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  • Wang, Bo-Yao (author)

Nonlinear bandgap opening behavior of BN co-doped graphene

  • Article/chapterEnglish2016

Publisher, publication year, extent ...

  • Elsevier,2016
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:kth-192381
  • https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-192381URI
  • https://doi.org/10.1016/j.carbon.2016.06.091DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • QC 20160913
  • We have demonstrated a nonlinear behavior for the bandgap opening of doped graphene by controlling the concentration of B and N co-dopants. X-ray absorption and emission spectra reveal that the bandgap increases from 0 to 0.6 eV as the concentration of BN dopants is increased from 0 to 6%, while the bandgap closes when the doping concentration becomes 56%. This nonlinear behavior of bandgap opening of the BN-doped graphene depending on the BN concentrations is consistent with the valenceband photoemission spectroscopic measurements. The spatially resolved B, N and C K-edge scanning transmission x-ray microscopy and their x-ray absorption near- edge structure spectra all support the scenario of the development of h-BN-like domains at high concentrations of BN. Ab initio calculation, by taking into account of the strong correlation between the bandgap and the geometry/concentration of the dopant, has been performed with various BN-dopant nano-domains embedded in the graphene monolayer to verify the unique bandgap behavior. Based on the experimental measurements and ab initio calculation, we propose the progressive formation of a phase-separated zigzag-edged BN domain from BN quantum dots with increasing BN-dopant concentration to explain the extraordinary nonlinear behavior of bandgap opening of BN-doped graphene sheets. This study reveals a new way to engineer the bandgap of low-dimensional systems.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Wang, Hsiaotsu (author)
  • Chen, Ling-Yen (author)
  • Hsueh, Hung-Chung (author)
  • Li, Xin (author)
  • Guo, Jinghua (author)
  • Luo, YiKTH,Teoretisk kemi och biologi(Swepub:kth)u126eitw (author)
  • Chiou, Jau-Wern (author)
  • Wang, Wei-Hua (author)
  • Wang, Po-Hsiang (author)
  • Chen, Kuei-Hsien (author)
  • Chen, Yen-Chih (author)
  • Chen, Li-Chyong (author)
  • Chen, Chia-Hao (author)
  • Wang, Jian (author)
  • Pong, Way-Faung (author)
  • KTHTeoretisk kemi och biologi (creator_code:org_t)

Related titles

  • In:Carbon: Elsevier107, s. 857-8640008-62231873-3891

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