Broadband photoresponse of flexible textured reduced graphene oxide films

Hee Yeon Yang, Hyun Joo Lee, Yongseok Jun, Yong Ju Yun

Research output: Contribution to journalArticle

Abstract

Herein, we fabricated flexible and transparent textured graphene films based on reduced graphene oxide flakes on polyethylene terephthalate substrates using a spray coating technique and investigated their photoresponsivity over a broadband range of wavelengths from the ultraviolet to infrared regions. The fabricated films exhibited a broadband photoresponse, with responsivity values reaching 2.5 mA/W at 365 nm, 2.4 mA/W at 530 nm, and 1.7 mA/W at 940 nm. In addition, the photoresponsivity was studied under bending deformation. Our flexible and textured reduced graphene oxide films could maintain a stable photoresponse upon bending for the radii of curvature larger than ~ 0.35 cm with a photocurrent deviation of <10% in the infrared range. The broadband photoresponse with good flexibility and transparency suggests that the reduced graphene oxide films can have immense potential for applications in flexible optoelectronic technologies.

Original languageEnglish
Article number137785
JournalThin Solid Films
Volume697
DOIs
Publication statusPublished - 2020 Mar 1

Keywords

  • Broadband photodetector
  • Flexible substrate
  • Graphene
  • Reduced graphene oxide
  • Textured film
  • Transparent substrate
  • Wrinkle

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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