UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV Photodetectors
The weak photon absorption and high recombination rate of electron-hole pairs in disordered zinc oxide nanowires (ZNWs) limit its application in UV photodetection. This limitation can be overcome by introducing graphene sheets to the ZNWs. Herein we report a high-performance photodetector based on o...
Main Authors: | , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2018-01-01
|
Series: | Nanomaterials |
Subjects: | |
Online Access: | http://www.mdpi.com/2079-4991/8/1/26 |
id |
doaj-6b81ceb49ec84dc7b8a2bac5e1624eb3 |
---|---|
record_format |
Article |
spelling |
doaj-6b81ceb49ec84dc7b8a2bac5e1624eb32020-11-24T21:03:00ZengMDPI AGNanomaterials2079-49912018-01-01812610.3390/nano8010026nano8010026UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV PhotodetectorsChangsong Chen0Peng Zhou1Na Wang2Yang Ma3Haisheng San4Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, ChinaPen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, ChinaPen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, ChinaPen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, ChinaPen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, ChinaThe weak photon absorption and high recombination rate of electron-hole pairs in disordered zinc oxide nanowires (ZNWs) limit its application in UV photodetection. This limitation can be overcome by introducing graphene sheets to the ZNWs. Herein we report a high-performance photodetector based on one-dimensional (1D) wide band-gap semiconductor disordered ZNWs composited with reduced graphene oxide (RGO) for ultraviolet (UV) photoresponse enhancement. The RGO/ZNWs composites have been successfully synthetized through UV-assisted photochemical reduction of GO in ZNWs suspension. The material characterizations in morphology, Raman scattering, and Ultraviolet-visible light absorption verified the formation of graphene sheets attached in ZNWs network and the enhancement of UV absorption due to the introduction of graphene. In comparison with photodetectors based on pure ZNWs, the photodetectors based on RGO/ZNWs composite exhibit enhanced photoresponse with photocurrent density of 5.87 mA·cm−2, on/off current ratio of 3.01 × 104, and responsivity of 1.83 A·W−1 when a UV irradiation of 3.26 mW·cm−2 and 1.0 V bias were used. Theory analysis is also presented to get insight into the inherent mechanisms of separation and transportation of photo-excited carriers in RGO/ZNWs composite.http://www.mdpi.com/2079-4991/8/1/26ZnO nanowireultraviolet (UV) photoresponsereduced graphene oxideUV-assisted photochemical synthesis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Changsong Chen Peng Zhou Na Wang Yang Ma Haisheng San |
spellingShingle |
Changsong Chen Peng Zhou Na Wang Yang Ma Haisheng San UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV Photodetectors Nanomaterials ZnO nanowire ultraviolet (UV) photoresponse reduced graphene oxide UV-assisted photochemical synthesis |
author_facet |
Changsong Chen Peng Zhou Na Wang Yang Ma Haisheng San |
author_sort |
Changsong Chen |
title |
UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV Photodetectors |
title_short |
UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV Photodetectors |
title_full |
UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV Photodetectors |
title_fullStr |
UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV Photodetectors |
title_full_unstemmed |
UV-Assisted Photochemical Synthesis of Reduced Graphene Oxide/ZnO Nanowires Composite for Photoresponse Enhancement in UV Photodetectors |
title_sort |
uv-assisted photochemical synthesis of reduced graphene oxide/zno nanowires composite for photoresponse enhancement in uv photodetectors |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2018-01-01 |
description |
The weak photon absorption and high recombination rate of electron-hole pairs in disordered zinc oxide nanowires (ZNWs) limit its application in UV photodetection. This limitation can be overcome by introducing graphene sheets to the ZNWs. Herein we report a high-performance photodetector based on one-dimensional (1D) wide band-gap semiconductor disordered ZNWs composited with reduced graphene oxide (RGO) for ultraviolet (UV) photoresponse enhancement. The RGO/ZNWs composites have been successfully synthetized through UV-assisted photochemical reduction of GO in ZNWs suspension. The material characterizations in morphology, Raman scattering, and Ultraviolet-visible light absorption verified the formation of graphene sheets attached in ZNWs network and the enhancement of UV absorption due to the introduction of graphene. In comparison with photodetectors based on pure ZNWs, the photodetectors based on RGO/ZNWs composite exhibit enhanced photoresponse with photocurrent density of 5.87 mA·cm−2, on/off current ratio of 3.01 × 104, and responsivity of 1.83 A·W−1 when a UV irradiation of 3.26 mW·cm−2 and 1.0 V bias were used. Theory analysis is also presented to get insight into the inherent mechanisms of separation and transportation of photo-excited carriers in RGO/ZNWs composite. |
topic |
ZnO nanowire ultraviolet (UV) photoresponse reduced graphene oxide UV-assisted photochemical synthesis |
url |
http://www.mdpi.com/2079-4991/8/1/26 |
work_keys_str_mv |
AT changsongchen uvassistedphotochemicalsynthesisofreducedgrapheneoxideznonanowirescompositeforphotoresponseenhancementinuvphotodetectors AT pengzhou uvassistedphotochemicalsynthesisofreducedgrapheneoxideznonanowirescompositeforphotoresponseenhancementinuvphotodetectors AT nawang uvassistedphotochemicalsynthesisofreducedgrapheneoxideznonanowirescompositeforphotoresponseenhancementinuvphotodetectors AT yangma uvassistedphotochemicalsynthesisofreducedgrapheneoxideznonanowirescompositeforphotoresponseenhancementinuvphotodetectors AT haishengsan uvassistedphotochemicalsynthesisofreducedgrapheneoxideznonanowirescompositeforphotoresponseenhancementinuvphotodetectors |
_version_ |
1716774563200630784 |