p-Pheneylendiamine functionalized rGO/Si heterostructure Schottky junction for UV photodetectors

In this work, we report on p-Phenylenediamine (PPD) functionalized reduced graphene oxide (rGO)/Si hybrid-structure designed for UV photodetector applications (PD). The hybrid-structure was characterized by using Fourier Transform-infrared spectroscopy, X-ray photoelectron spectroscopy to confirm th...

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Bibliographic Details
Published in:Diamond and related materials 2019-03, Vol.93, p.208-215
Main Authors: Chandrakalavathi, T., Reddeppa, Maddaka, Revathi, T., Basivi, Praveen Kumar, Viswanath, Sujaya Kumar, Murali, G., Kim, Moon-Deock, Jeyalakshmi, R.
Format: Article
Language:English
Subjects:
Charge transfer
Covalent bonds
Current voltage characteristics
Fourier transforms
Graphene
Heterostructures
Hybrid structures
Hybrid-structure
p-Pheneylendiamine
Phenylenediamine
Photoelectric effect
Photoelectric emission
Photoelectrons
Photometers
Resistance factors
rGO
Spectrum analysis
Ultraviolet radiation
UV photodetectors
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Summary:In this work, we report on p-Phenylenediamine (PPD) functionalized reduced graphene oxide (rGO)/Si hybrid-structure designed for UV photodetector applications (PD). The hybrid-structure was characterized by using Fourier Transform-infrared spectroscopy, X-ray photoelectron spectroscopy to confirm the formation of nano-hybrid structure and the experimental results confirmed the covalent bond between rGO and PPD. The diode parameters such as barrier height, series resistance, and ideality factor were estimated for both PPD functionalized rGO (PrGO)/Si and rGO/Si heterostructure by using I-V characteristics. The time-resolved photocurrent spectroscopy used to examine the photoresponse properties of both PrGO/Si and rGO/Si samples with UV light (λ = 382 nm). The experimental results showed that PrGO/Si exhibited significant UV photoresponse than that of rGO/Si PD. The PrGO/Si heterostructure device exhibited photoresponsivity of 1.4 × 10−3 A/W, which is 15 times higher than rGO/Si. The high photoresponse was attributed to the synergistic effects originated from the charge transfer between PPD and rGO. The results proved that PrGO is a promising material for high response photodetector applications. [Display omitted] •p-Pheneylendiamine covalently functionalized with rGO.•PPD-rGO/Si hybrid structure practically applied for photodetector applications.•The charge transfer between PPD and rGO could be enhanced the photoresponse of hybrid structure.
ISSN:0925-9635
1879-0062
DOI:10.1016/j.diamond.2019.02.005