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Open AccessArticle

A Broadband Phototransistor Based on Three-Dimensional Reduced Graphene Oxide Foam

1
Key Laboratory of Opto-Electronics Information Technology (Tianjin University), Ministry of Education, School of Precision Instruments and Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
2
Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University, Tianjin 300072, China
*
Author to whom correspondence should be addressed.
Nanomaterials 2018, 8(11), 913; https://doi.org/10.3390/nano8110913
Received: 7 September 2018 / Revised: 29 October 2018 / Accepted: 30 October 2018 / Published: 6 November 2018
(This article belongs to the Special Issue Graphene-Based Nanostructures and Optoelectronic Applications)
Three-dimensional (3D) cross-linked polymer-like reduced graphene oxide foams (rGOFs) with a seamlessly continuous graphene network, exhibit high photoresponsive and conductivity and have received much attention regarding solar cells and supercapacitors. However, little attention has been paid to photodetection applications of 3D rGOFs. Here we report a novel broadband phototransistor based on metal-3D GFs-metal, which exhibits a high light absorption and a wide spectra response ranging at least from 400 to 1600 nm wavelength with a maximum photoresponsivity of 10 mA/W at 400 nm. In particular, stable and reproducible photocurrent cycles are achieved under different light blue light (405 nm), green light (532 nm), and NIR (808 nm) irradiations. Moreover, the device displays a typical transistor characteristic with a rapid response time of 18 ms at under 532 nm irradiation. The excellent performances indicate 3D rGOF as a promising candidate for future photodetection application. View Full-Text
Keywords: three-dimensional graphene foams; broadband phototransistor; photoresponsivity; response time three-dimensional graphene foams; broadband phototransistor; photoresponsivity; response time
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MDPI and ACS Style

Li, Y.; Zhang, Y.; Yu, Y.; Chen, Z.; Jin, L.; Cao, M.; Dai, H.; Yao, J. A Broadband Phototransistor Based on Three-Dimensional Reduced Graphene Oxide Foam. Nanomaterials 2018, 8, 913.

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