Multifunctional Graphene Optoelectronic Devices Capable of Detecting and Storing Photonic Signals

Sukjae Jang, Euyheon Hwang, Youngbin Lee, Seungwoo Lee, Jeong Ho Cho

Research output: Contribution to journalReview article

59 Citations (Scopus)

Abstract

The advantages of graphene photodetectors were utilized to design a new multifunctional graphene optoelectronic device. Organic semiconductors, gold nanoparticles (AuNPs), and graphene were combined to fabricate a photodetecting device with a nonvolatile memory function for storing photonic signals. A pentacene organic semiconductor acted as a light absorption layer in the device and provided a high hole photocurrent to the graphene channel. The AuNPs, positioned between the tunneling and blocking dielectric layers, acted as both a charge trap layer and a plasmonic light scatterer, which enable storing of the information about the incident light. The proposed pentacene-graphene-AuNP hybrid photodetector not only performed well as a photodetector in the visible light range, it also was able to store the photonic signal in the form of persistent current. The good photodetection performance resulted from the plasmonics-enabled enhancement of the optical absorption and from the photogating mechanisms in the pentacene. The device provided a photoresponse that depended on the wavelength of incident light; therefore, the signal information (both the wavelength and intensity) of the incident light was effectively committed to memory. The simple process of applying a negative pulse gate voltage could then erase the programmed information. The proposed photodetector with the capacity to store a photonic signal in memory represents a significant step toward the use of graphene in optoelectronic devices.

Original languageEnglish
Pages (from-to)2542-2547
Number of pages6
JournalNano letters
Volume15
Issue number4
DOIs
Publication statusPublished - 2015 Apr 8

Fingerprint

Graphite
optoelectronic devices
Optoelectronic devices
Photonics
Graphene
graphene
photonics
Photodetectors
photometers
Semiconducting organic compounds
organic semiconductors
Data storage equipment
Light absorption
Wavelength
electromagnetic absorption
Photocurrents
wavelengths
Gold
photocurrents
optical absorption

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

Jang, Sukjae ; Hwang, Euyheon ; Lee, Youngbin ; Lee, Seungwoo ; Cho, Jeong Ho. / Multifunctional Graphene Optoelectronic Devices Capable of Detecting and Storing Photonic Signals. In: Nano letters. 2015 ; Vol. 15, No. 4. pp. 2542-2547.
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abstract = "The advantages of graphene photodetectors were utilized to design a new multifunctional graphene optoelectronic device. Organic semiconductors, gold nanoparticles (AuNPs), and graphene were combined to fabricate a photodetecting device with a nonvolatile memory function for storing photonic signals. A pentacene organic semiconductor acted as a light absorption layer in the device and provided a high hole photocurrent to the graphene channel. The AuNPs, positioned between the tunneling and blocking dielectric layers, acted as both a charge trap layer and a plasmonic light scatterer, which enable storing of the information about the incident light. The proposed pentacene-graphene-AuNP hybrid photodetector not only performed well as a photodetector in the visible light range, it also was able to store the photonic signal in the form of persistent current. The good photodetection performance resulted from the plasmonics-enabled enhancement of the optical absorption and from the photogating mechanisms in the pentacene. The device provided a photoresponse that depended on the wavelength of incident light; therefore, the signal information (both the wavelength and intensity) of the incident light was effectively committed to memory. The simple process of applying a negative pulse gate voltage could then erase the programmed information. The proposed photodetector with the capacity to store a photonic signal in memory represents a significant step toward the use of graphene in optoelectronic devices.",
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Multifunctional Graphene Optoelectronic Devices Capable of Detecting and Storing Photonic Signals. / Jang, Sukjae; Hwang, Euyheon; Lee, Youngbin; Lee, Seungwoo; Cho, Jeong Ho.

In: Nano letters, Vol. 15, No. 4, 08.04.2015, p. 2542-2547.

Research output: Contribution to journalReview article

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