3D Bicontinuous Nanoporous Reduced Graphene Oxide for Highly Sensitive Photodetectors

Yoshikazu Ito, Wenfeng Zhang, Jinhua Li, Haixin Chang, Pan Liu, Takeshi Fujita, Yongwen Tan, Feng Yan, Mingwei Chen

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

Reduced graphene oxide (RGO) is an important graphene derivative for applications in photonics and optoelectronics because of the band gap created by chemical oxidation. However, most RGO materials made by chemically exfoliated graphite oxide are 2D flakes. Their optoelectronic performance deteriorates significantly as a result of weak light-matter interaction and poor electrical contact between stacking flakes. Here we report a bicontinuous 3D nanoporous RGO (3D np-RGO) with high optoelectronic performance for highly sensitive photodetectors. 3D np-RGO demonstrates a over 40 times higher light absorption than monolayer graphene materials and at least two orders of magnitude higher electron mobility than conventional RGO from discrete RGO flakes. The np-RGO with an optimal reduction state shows ultrahigh photoresponse of 3.10 × 104 A W-1 at room temperature, approximately four orders of magnitude higher than graphene and other graphene derivatives at similar levels of light intensity radiations, and the excellent external quantum efficiency of 1.04 × 107% better than commercial silicon photodetector. The ultrahigh capability of conversing photons to photocurrent originates from strongly enhanced light absorption, facilitated photocarrier transport, and tunable oxygenous defects and reduction states in the 3D interconnected bicontinuous RGO network.

Original languageEnglish
Pages (from-to)1271-1277
Number of pages7
JournalAdvanced Functional Materials
Volume26
Issue number8
DOIs
Publication statusPublished - 2016 Feb 23

Keywords

  • bicontinuous nanoporosity
  • nanoporous reduced graphene oxide
  • optoelectronics
  • photodetectors
  • photoresponsivity

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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  • Cite this

    Ito, Y., Zhang, W., Li, J., Chang, H., Liu, P., Fujita, T., Tan, Y., Yan, F., & Chen, M. (2016). 3D Bicontinuous Nanoporous Reduced Graphene Oxide for Highly Sensitive Photodetectors. Advanced Functional Materials, 26(8), 1271-1277. https://doi.org/10.1002/adfm.201504146