Photoexfoliation of two-dimensional materials through continuous UV irradiation

Wai Chen Lin, Ming Kai Chuang, Muchamed L. Keshtov, Ganesh D. Sharma, Fang-Chung Chen

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


This paper describes the preparation of fluorinated graphene nanosheets (FGNs) through photoexfoliation of fluorinated graphite (FG) in the liquid phase. We discovered that UV irradiation of FG dispersions in N-methyl-2-pyrolidone facilitated exfoliation to give FGNs. Transmission electron microscopy and atomic force microscopy revealed that the average thickness of the FGNs was approximately 3 nm; they were considerably thinner than the nanosheets prepared using a conventional sonication approach. Furthermore, when the FGNs were deposited uniformly onto substrates (through spin coating), they formed effective cathode interlayers for polymer solar cells (PSCs), the efficiency of which was 60% greater than that of PSCs containing FGNs prepared through ultrasonication.

Original languageEnglish
Article number125604
Issue number12
StatePublished - 21 Feb 2017


  • exfoliation
  • grapheme
  • polymer
  • solar cells

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