Three Colors Emission from S,N Co-doped Graphene Quantum Dots for Visible Light H2Production and Bioimaging

A facile solvothermal route to synthesize S,N co-doped graphene quantum dots with unique optical properties is demonstrated

Dan Qu; Zaicheng Sun; Min Zheng; Jing Li; Yongqiang Zhang; Guoqiang Zhang; Haifeng Zhao; Xingyuan Liu; Zhigang Xie

2015

Scholarcy highlights

  • A facile solvothermal route to synthesize S,N co-doped graphene quantum dots with unique optical properties is demonstrated
  • Three absorption bands are observed at 338, 467, and 557 nm, which is different from any previous reports
  • The photoluminescent spectra display emissions in three primary colors that are independent of the excitation wavelength, within the excitation wavelength ranges of 340–420 nm, 460–540 nm, and 560–620 nm
  • It is proposed that three independent luminescent centers coexist in S,N-GQDs because the doping with S and N may change the chemical environment of the GQDs
  • Energy-transfer processes usually do not occur among the independent luminescent centers under different wavelength light excitation
  • Any queries should be directed to the corresponding author for the article

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