Synthesis of thin-film black phosphorus on a flexible substrate

Xuesong Li, Bingchen Deng, Xiaomu Wang, Sizhe Chen, Michelle Vaisman, Shun Ichiro Karato, Grace Pan, Minjoo Larry Lee, Judy Cha, Han Wang, Fengnian Xia

Research output: Contribution to journalArticlepeer-review

Abstract

Wereport a scalable approach to synthesize a large-area (up to 4 mm)thin black phosphorus (BP) film on a flexible substrate.Wefirst deposit a red phosphorus thin-film on a flexible polyester substrate, followed by its conversion to BP in a high-pressure multi-anvil cell at room temperature. Raman spectroscopy and transmission electron microscopy measurements confirm the formation of a nano-crystalline BP thin-film with a thickness of around 40 nm. Optical characterization indicates a bandgap of around 0.28 eV in the converted BP, similar to the bandgap measured in exfoliated thinfilms. Thin-film BP transistors exhibit a field-effect mobility of around 0.5 cm2 V- s-, which can probably be further enhanced by the optimization of the conversion process at elevated temperatures. Our work opens the avenue for the future demonstration of large-scale, high quality thin-film BP.

Original languageEnglish (US)
Article number031002
Journal2D Materials
Volume2
Issue number3
DOIs
StatePublished - Aug 6 2015
Externally publishedYes

Keywords

  • Black phosphorus
  • Phase transformation
  • Pressurization
  • Thermal deposition

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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