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Multifunctional graphene optoelectronic devices capable of detecting and storing photonic signals.
Nano Lett. 2015 Apr 08; 15(4):2542-7.NL

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.

Authors+Show Affiliations

†SKKU Advanced Institute of Nanotechnology (SAINT), ‡Department of Physics, and §School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.†SKKU Advanced Institute of Nanotechnology (SAINT), ‡Department of Physics, and §School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.†SKKU Advanced Institute of Nanotechnology (SAINT), ‡Department of Physics, and §School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.†SKKU Advanced Institute of Nanotechnology (SAINT), ‡Department of Physics, and §School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.†SKKU Advanced Institute of Nanotechnology (SAINT), ‡Department of Physics, and §School of Chemical Engineering, Sungkyunkwan University, Suwon 440-746, Republic of Korea.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25811444

Citation

Jang, Sukjae, et al. "Multifunctional Graphene Optoelectronic Devices Capable of Detecting and Storing Photonic Signals." Nano Letters, vol. 15, no. 4, 2015, pp. 2542-7.
Jang S, Hwang E, Lee Y, et al. Multifunctional graphene optoelectronic devices capable of detecting and storing photonic signals. Nano Lett. 2015;15(4):2542-7.
Jang, S., Hwang, E., Lee, Y., Lee, S., & Cho, J. H. (2015). Multifunctional graphene optoelectronic devices capable of detecting and storing photonic signals. Nano Letters, 15(4), 2542-7. https://doi.org/10.1021/acs.nanolett.5b00105
Jang S, et al. Multifunctional Graphene Optoelectronic Devices Capable of Detecting and Storing Photonic Signals. Nano Lett. 2015 Apr 8;15(4):2542-7. PubMed PMID: 25811444.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Multifunctional graphene optoelectronic devices capable of detecting and storing photonic signals. AU - Jang,Sukjae, AU - Hwang,Euyheon, AU - Lee,Youngbin, AU - Lee,Seungwoo, AU - Cho,Jeong Ho, Y1 - 2015/03/27/ PY - 2015/3/27/entrez PY - 2015/3/27/pubmed PY - 2015/3/27/medline KW - Graphene KW - flexible optoelectronics KW - nonvolatile memory KW - photodetector KW - photogating KW - plasmonic SP - 2542 EP - 7 JF - Nano letters JO - Nano Lett. VL - 15 IS - 4 N2 - 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. SN - 1530-6992 UR - https://www.unboundmedicine.com/medline/citation/25811444/Multifunctional_graphene_optoelectronic_devices_capable_of_detecting_and_storing_photonic_signals_ L2 - https://dx.doi.org/10.1021/acs.nanolett.5b00105 DB - PRIME DP - Unbound Medicine ER -
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