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One-step and controllable bipolar doping of reduced graphene oxide using TMAH as reducing agent and doping source for field effect transistors

Title
One-step and controllable bipolar doping of reduced graphene oxide using TMAH as reducing agent and doping source for field effect transistors
Authors
Khan, FirozBaek, Seong-HoKim, Jae Hyun
DGIST Authors
Baek, Seong-Ho; Kim, Jae Hyun
Issue Date
2016-04
Citation
Carbon, 100, 608-616
Type
Article
Article Type
Article
Keywords
Ammonium HydroxideCarrier ConcentrationElectron Withdrawing GroupField-Effect DevicesField Effect TransistorsFlexible Electronic DevicesGrapheneGraphene TransistorsLow Temperature MethodLow Temperature ProductionLow TemperaturesReduced-Graphene OxidesSimultaneous ReductionTemperatureTetramethyl Ammonium HydroxideWork-Function
ISSN
0008-6223
Abstract
Simultaneous reduction and doping of the graphene oxide (GO) is an important issue for low temperature processed flexible electronic devices. A low temperature method for reduction and ambipolar doping has been developed which yield the doped reduced GO with wide range of work function with a mass production using tetra-methyl ammonium hydroxide (TMAH). The doping type of obtained reduced GO is tuned with TMAH concentration. XPS analysis revealed that the graphitic N is converted to oxidized N with increase of TMAH concentration. The work function is tuned via wide range variation in the carrier concentration in neutral (rGO-A, 4.46 eV), n-type (rGO-B, 3.90 eV) and p-type (rGO-C, 5.29 eV) regimes. The obtained Dirac voltages of field effect devices are -1 V, -31 V and +35 V with active layer of rGO-A, rGO-B and rGO-C, respectively. The n-type doping is due to incorporation of graphitic N, whereas, oxidized N acts as electron withdrawing group which causes p-type doping. © 2016 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5110
DOI
10.1016/j.carbon.2016.01.064
Publisher
Elsevier Ltd
Related Researcher
Files:
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Collection:
Smart Textile Convergence Research Group1. Journal Articles


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