Lateral photovoltaic effect in flexible free-standing reduced graphene oxide film for self-powered position-sensitive detection

In Kyu Moon, Bugeun Ki, Seonno Yoon, Jungwoo Oh

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Lightweight, simple and flexible self-powered photodetectors are urgently required for the development and application of advanced optical systems for the future of wearable electronic technology. Here, using a low-temperature reduction process, we report a chemical approach for producing freestanding monolithic reduced graphene oxide papers with different gradients of the carbon/oxygen concentration ratio. We also demonstrate a novel type of freestanding monolithic reduced graphene oxide self-powered photodetector based on a symmetrical metal-semiconductor-metal structure. Upon illumination by a 633-nm continuous wave laser, the lateral photovoltage is observed to vary linfearly with the laser position between two electrodes on the reduced graphene oxide surface. This result may suggest that the lateral photovoltaic effect in the reduced graphene oxide film originates from the built-in electric field by the combination of both the photothermal electric effect and the gradient of the oxygen-to-carbon composition. These results represent substantial progress toward novel, chemically synthesized graphene-based photosensors and suggest one-step integration of graphene-based optoelectronics in the future.

Original languageEnglish
Article number33525
JournalScientific reports
Volume6
DOIs
Publication statusPublished - 2016 Sep 16

Fingerprint

Photovoltaic effects
Graphite
Oxide films
Oxides
Photodetectors
Carbon
Metals
Oxygen
Continuous wave lasers
Optical systems
Optoelectronic devices
Lighting
Electric fields
Semiconductor materials
Electrodes
Lasers
Chemical analysis

All Science Journal Classification (ASJC) codes

  • General

Cite this

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abstract = "Lightweight, simple and flexible self-powered photodetectors are urgently required for the development and application of advanced optical systems for the future of wearable electronic technology. Here, using a low-temperature reduction process, we report a chemical approach for producing freestanding monolithic reduced graphene oxide papers with different gradients of the carbon/oxygen concentration ratio. We also demonstrate a novel type of freestanding monolithic reduced graphene oxide self-powered photodetector based on a symmetrical metal-semiconductor-metal structure. Upon illumination by a 633-nm continuous wave laser, the lateral photovoltage is observed to vary linfearly with the laser position between two electrodes on the reduced graphene oxide surface. This result may suggest that the lateral photovoltaic effect in the reduced graphene oxide film originates from the built-in electric field by the combination of both the photothermal electric effect and the gradient of the oxygen-to-carbon composition. These results represent substantial progress toward novel, chemically synthesized graphene-based photosensors and suggest one-step integration of graphene-based optoelectronics in the future.",
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Lateral photovoltaic effect in flexible free-standing reduced graphene oxide film for self-powered position-sensitive detection. / Moon, In Kyu; Ki, Bugeun; Yoon, Seonno; Oh, Jungwoo.

In: Scientific reports, Vol. 6, 33525, 16.09.2016.

Research output: Contribution to journalArticle

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