Surface-Modified Graphene for Mid-Infrared Detection
( Graphene Materials - Advanced Applications )
Publication series ： Graphene Materials - Advanced Applications
Author： Mehrdad Siahsar Mahboubeh Dolatyari Ali Rostami and GhasemRostami
Publisher： IntechOpen
Publication year： 2017
E-ISBN: INT6867967490
P-ISBN(Paperback): 9789535131410
P-ISBN(Hardback): 9789535131427
Subject： O6-0 chemical principle and method
Keyword： 化学原理和方法
Language： ENG
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Surface-Modified Graphene for Mid-Infrared Detection
Description
In this chapter, morphology variation and electronic structure in a surface-modified graphene are demonstrated by both calculation and experimental results. The results indicate that the band structure and morphology of modified graphene sheets are altered because of changing in the type of hybridization of carbon atoms in the graphene sheet. Accordingly, the band gap of graphene can be tuned by surface modification using organic molecules. Then, modified graphene is used for fabrication of infrared detectors. The properties of unmodified graphene photodetectors were also measured so as to compare with modified graphene photodetectors. The results demonstrate that modification of graphene using organic ligands improved the detection parameters such as fast response time, electrical stability and low dark current. Moreover, the sensitivity of photodetectors based on modified graphene was significantly improved.
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