Solution-Based Processing of Optoelectronically Active Indium Selenide

Joohoon Kang, Spencer A. Wells, Vinod K. Sangwan, David Lam, Xiaolong Liu, Jan Luxa, Zdeněk Sofer, Mark C Hersam

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Layered indium selenide (InSe) presents unique properties for high-performance electronic and optoelectronic device applications. However, efforts to process InSe using traditional liquid phase exfoliation methods based on surfactant-assisted aqueous dispersions or organic solvents with high boiling points compromise electronic properties due to residual surface contamination and chemical degradation. Here, these limitations are overcome by utilizing a surfactant-free, low boiling point, deoxygenated cosolvent system. The resulting InSe flakes and thin films possess minimal processing residues and are structurally and chemically pristine. When employed in photodetectors, individual InSe nanosheets exhibit a maximum photoresponsivity of ≈5 × 107 A W−1, which is the highest value of any solution-processed monolithic semiconductor to date. Furthermore, the surfactant-free cosolvent system not only stabilizes InSe dispersions but is also amenable to the assembly of electronically percolating InSe flake arrays without posttreatment, which enables the realization of ultrahigh performance thin-film photodetectors. This surfactant-free, deoxygenated cosolvent approach can be generalized to other layered materials, thereby presenting additional opportunities for solution-processed thin-film electronic and optoelectronic technologies.

Original languageEnglish
Article number1802990
JournalAdvanced Materials
Volume30
Issue number38
DOIs
Publication statusPublished - Sep 20 2018

Fingerprint

Indium
Surface-Active Agents
Surface active agents
Processing
Boiling point
Photodetectors
Dispersions
Thin films
Optoelectronic devices
Nanosheets
Electronic properties
Organic solvents
Contamination
Semiconductor materials
Degradation
Liquids

Keywords

  • 2D materials
  • cosolvent
  • deoxygenated
  • liquid phase exfoliation
  • photodetectors
  • surfactant-free

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Kang, J., Wells, S. A., Sangwan, V. K., Lam, D., Liu, X., Luxa, J., ... Hersam, M. C. (2018). Solution-Based Processing of Optoelectronically Active Indium Selenide. Advanced Materials, 30(38), [1802990]. https://doi.org/10.1002/adma.201802990

Solution-Based Processing of Optoelectronically Active Indium Selenide. / Kang, Joohoon; Wells, Spencer A.; Sangwan, Vinod K.; Lam, David; Liu, Xiaolong; Luxa, Jan; Sofer, Zdeněk; Hersam, Mark C.

In: Advanced Materials, Vol. 30, No. 38, 1802990, 20.09.2018.

Research output: Contribution to journalArticle

Kang, J, Wells, SA, Sangwan, VK, Lam, D, Liu, X, Luxa, J, Sofer, Z & Hersam, MC 2018, 'Solution-Based Processing of Optoelectronically Active Indium Selenide', Advanced Materials, vol. 30, no. 38, 1802990. https://doi.org/10.1002/adma.201802990
Kang J, Wells SA, Sangwan VK, Lam D, Liu X, Luxa J et al. Solution-Based Processing of Optoelectronically Active Indium Selenide. Advanced Materials. 2018 Sep 20;30(38). 1802990. https://doi.org/10.1002/adma.201802990
Kang, Joohoon ; Wells, Spencer A. ; Sangwan, Vinod K. ; Lam, David ; Liu, Xiaolong ; Luxa, Jan ; Sofer, Zdeněk ; Hersam, Mark C. / Solution-Based Processing of Optoelectronically Active Indium Selenide. In: Advanced Materials. 2018 ; Vol. 30, No. 38.
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