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Hybrid structures of organic dye and graphene for ultrahigh gain photodetectors

Title
Hybrid structures of organic dye and graphene for ultrahigh gain photodetectors
Author(s)
Lee, YoungbinYu, Seong HunJeon, JiwonKim, HyunminLee, Jun YoungKim, HyungjunAhn, Jong-HyunHwang, EuyheonCho, Jeong Ho
Issued Date
2015-07
Citation
Carbon, v.88, pp.165 - 172
Type
Article
Keywords
Broad SpectralDENSITY-FUNCTIONAL THEORYDye SensitizedFluorescenceGrapheneHybrid Photo DetectorsHybrid StructureLONDON DISPERSIONNANOPARTICLESOptoelectronic DevicesOrganic Dye MoleculesOXIDEPhotoabsorptionsPHOTOCONDUCTORPhotodetectorsPhotonsPHOTORESPONSESINGLE-LAYER GRAPHENESUBSTRATEULTRAHIGH GAINUltraviolet Region
ISSN
0008-6223
Abstract
Abstract A hybrid structure comprising organic dye molecules (e.g., rhodamine 6G) and graphene was developed for the realization of high-performance optoelectronic devices. The fabricated photodetector offered a broad spectral photo-response across wavelengths in the infrared, visible, and ultraviolet regions, as well as a high responsivity (∼460 A/W at illumination power of 1 μW). The photocurrent generated in the hybrid photodetector (∼mA) was much higher than that generated in a pristine graphene photodetector (<μA). The performance of the dye-sensitized photodetector relied on enhanced photoabsorption and the implementation of a photocurrent gain arising from the photo-excited charges. © 2015 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2884
DOI
10.1016/j.carbon.2015.02.071
Publisher
Elsevier Ltd
Related Researcher
  • 김현민 Kim, Hyunmin
  • Research Interests Nonlinear optics; Femtosecond ultrafast carrier dynamics; Super resolution microscopy; Optical soliton transport; Biological imaging
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Appears in Collections:
Division of Biomedical Technology 1. Journal Articles

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