Reduced graphene oxide on silicon-based structure as novel broadband photodetector

Abstract Heterojunction photodetector based on reduced graphene oxide (rGO) has been realized using a spin coating technique. The electrical and optical characterization of bare GO and thermally reduced GO thin films deposited on glass substrate has been carried out. Ultraviolet–visible–infrared tra...

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Autores principales:	Carmela Bonavolontà, Antonio Vettoliere, Giuseppe Falco, Carla Aramo, Ivo Rendina, Berardo Ruggiero, Paolo Silvestrini, Massimo Valentino
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/0eabce4ab5894326b6d54cd501f4a033
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spelling	oai:doaj.org-article:0eabce4ab5894326b6d54cd501f4a0332021-12-02T17:45:17ZReduced graphene oxide on silicon-based structure as novel broadband photodetector10.1038/s41598-021-92518-z2045-2322https://doaj.org/article/0eabce4ab5894326b6d54cd501f4a0332021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92518-zhttps://doaj.org/toc/2045-2322Abstract Heterojunction photodetector based on reduced graphene oxide (rGO) has been realized using a spin coating technique. The electrical and optical characterization of bare GO and thermally reduced GO thin films deposited on glass substrate has been carried out. Ultraviolet–visible–infrared transmittance measurements of the GO and rGO thin films revealed broad absorption range, while the absorbance analysis evaluates rGO band gap of about 2.8 eV. The effect of GO reduction process on the photoresponse capability is reported. The current–voltage characteristics and the responsivity of rGO/n-Si based device have been investigated using laser diode wavelengths from UV up to IR spectral range. An energy band diagram of the heterojunction has been proposed to explain the current versus voltage characteristics. The device demonstrates a photoresponse at a broad spectral range with a maximum responsivity and detectivity of 0.20 A/W and 7 × 1010 cmHz/W, respectively. Notably, the obtained results indicate that the rGO based device can be useful for broadband radiation detection compatible with silicon device technology.Carmela BonavolontàAntonio VettoliereGiuseppe FalcoCarla AramoIvo RendinaBerardo RuggieroPaolo SilvestriniMassimo ValentinoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Carmela Bonavolontà Antonio Vettoliere Giuseppe Falco Carla Aramo Ivo Rendina Berardo Ruggiero Paolo Silvestrini Massimo Valentino Reduced graphene oxide on silicon-based structure as novel broadband photodetector
description	Abstract Heterojunction photodetector based on reduced graphene oxide (rGO) has been realized using a spin coating technique. The electrical and optical characterization of bare GO and thermally reduced GO thin films deposited on glass substrate has been carried out. Ultraviolet–visible–infrared transmittance measurements of the GO and rGO thin films revealed broad absorption range, while the absorbance analysis evaluates rGO band gap of about 2.8 eV. The effect of GO reduction process on the photoresponse capability is reported. The current–voltage characteristics and the responsivity of rGO/n-Si based device have been investigated using laser diode wavelengths from UV up to IR spectral range. An energy band diagram of the heterojunction has been proposed to explain the current versus voltage characteristics. The device demonstrates a photoresponse at a broad spectral range with a maximum responsivity and detectivity of 0.20 A/W and 7 × 1010 cmHz/W, respectively. Notably, the obtained results indicate that the rGO based device can be useful for broadband radiation detection compatible with silicon device technology.
format	article
author	Carmela Bonavolontà Antonio Vettoliere Giuseppe Falco Carla Aramo Ivo Rendina Berardo Ruggiero Paolo Silvestrini Massimo Valentino
author_facet	Carmela Bonavolontà Antonio Vettoliere Giuseppe Falco Carla Aramo Ivo Rendina Berardo Ruggiero Paolo Silvestrini Massimo Valentino
author_sort	Carmela Bonavolontà
title	Reduced graphene oxide on silicon-based structure as novel broadband photodetector
title_short	Reduced graphene oxide on silicon-based structure as novel broadband photodetector
title_full	Reduced graphene oxide on silicon-based structure as novel broadband photodetector
title_fullStr	Reduced graphene oxide on silicon-based structure as novel broadband photodetector
title_full_unstemmed	Reduced graphene oxide on silicon-based structure as novel broadband photodetector
title_sort	reduced graphene oxide on silicon-based structure as novel broadband photodetector
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/0eabce4ab5894326b6d54cd501f4a033
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Reduced graphene oxide on silicon-based structure as novel broadband photodetector

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