Direct Comparison of Optical Properties from Graphene Oxide Quantum Dots and Graphene Oxide

DOI QR코드

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Jang, Min-Ho;Ha, Hyun Dong;Seo, Tae Seok;Cho, Yong-Hoon

  • 투고 : 2015.07.22
  • 심사 : 2015.07.29
  • 발행 : 2015.07.30

초록

The graphene oxide (GO) and graphene oxide quantum dots (GOQDs), which have gained research interest as new types of light-emitting materials, were synthesized by the modified Hummers method for oxidation of graphite flake and graphite nanoparticle. The optical properties of GO and GOQDs have been compared by mean of photoluminescence (PL), PL excitation (PLE), UV-vis absorbance, and time-resolved PL. The GO have an absorption peak at 229 nm and shoulder part at 310 nm, whereas the GOQDs show broad absorption with a gradual change up without any absorption peaks. The PL emission of GOQDs and GO showed the green color at 520 nm and the red color at 690 nm, respectively. The red emission of GO showed faster PL decay time than the green emission of GOQDs. In particular, the temporal PL profile of the GO showed redshift from 560 nm to 660 nm after the pump event.

키워드

Graphene oxide;Graphene quantum dot;Graphene oxide quantum dot;Photoluminescence;Time-resolved photoluminescence

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피인용 문헌

  1. 1. Structural, electrical, and acoustical properties of graphene oxide films for acoustoelectronic applications vol.214, pp.8, 2017, doi:10.5757/ASCT.2015.24.4.111

과제정보

연구 과제번호 : "그래핀 합성, 물성제어 및 응용 소자 원천기술 연구"