Enhanced photocurrent performance of partially decorated Au nanoparticles on ZnO nanorods based UV photodetector

Rizwan Khan; Periyayya Uthirakumar; Tae Hwan Kim; In Hwan Lee

doi:10.1016/j.materresbull.2019.03.017

Enhanced photocurrent performance of partially decorated Au nanoparticles on ZnO nanorods based UV photodetector

Rizwan Khan, Periyayya Uthirakumar, Tae Hwan Kim, In Hwan Lee

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

The surface modification is essentially required to develop a variety of hybrid zinc oxide (ZnO) nanostructures for fabricating optoelectronic devices. A facile solution method was proposed to prepare the relatively low and high aspect ratio ZnO nanorods (NRs) and subsequently decorated with gold nanoparticles (Au NPs) partially on the surface of ZnO NRs. The Au-ZnO NRs exhibited an enhanced band-edge emission due to the surface plasmon resonance quenching of deep level defect emission, as compared to bare ZnO NRs. The UV photodetector with the relatively low aspect ratio Au-ZnO NRs showed a lower photocurrent in dark. However, after UV light illumination, a remarkable enhancement in photocurrent owing to the Au modification was observed, which leads a strong absorption and an improved interfacial charge separation process. Hence, the relatively low aspect ratio Au-ZnO NRs provides a channel for fabricating a high performance UV photodetector, in the near future.

Original language	English
Pages (from-to)	176-181
Number of pages	6
Journal	Materials Research Bulletin
Volume	115
DOIs	https://doi.org/10.1016/j.materresbull.2019.03.017
Publication status	Published - 2019 Jul

Bibliographical note

Funding Information:
This research was supported by BK21 plus project in 2018, National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT and Future Planning ( KRF-2017R1A2B3006141 ).

Publisher Copyright:
© 2019 Elsevier Ltd

Keywords

Au-nanoparticles
Photocurrent
Surface plasmons
UV photodetector
ZnO-nanorods

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.materresbull.2019.03.017

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title = "Enhanced photocurrent performance of partially decorated Au nanoparticles on ZnO nanorods based UV photodetector",

abstract = "The surface modification is essentially required to develop a variety of hybrid zinc oxide (ZnO) nanostructures for fabricating optoelectronic devices. A facile solution method was proposed to prepare the relatively low and high aspect ratio ZnO nanorods (NRs) and subsequently decorated with gold nanoparticles (Au NPs) partially on the surface of ZnO NRs. The Au-ZnO NRs exhibited an enhanced band-edge emission due to the surface plasmon resonance quenching of deep level defect emission, as compared to bare ZnO NRs. The UV photodetector with the relatively low aspect ratio Au-ZnO NRs showed a lower photocurrent in dark. However, after UV light illumination, a remarkable enhancement in photocurrent owing to the Au modification was observed, which leads a strong absorption and an improved interfacial charge separation process. Hence, the relatively low aspect ratio Au-ZnO NRs provides a channel for fabricating a high performance UV photodetector, in the near future.",

keywords = "Au-nanoparticles, Photocurrent, Surface plasmons, UV photodetector, ZnO-nanorods",

author = "Rizwan Khan and Periyayya Uthirakumar and Kim, {Tae Hwan} and Lee, {In Hwan}",

note = "Funding Information: This research was supported by BK21 plus project in 2018, National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT and Future Planning ( KRF-2017R1A2B3006141 ). Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

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doi = "10.1016/j.materresbull.2019.03.017",

language = "English",

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pages = "176--181",

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AU - Khan, Rizwan

AU - Uthirakumar, Periyayya

AU - Kim, Tae Hwan

AU - Lee, In Hwan

N1 - Funding Information: This research was supported by BK21 plus project in 2018, National Research Foundation of Korea (NRF) funded by Ministry of Science, ICT and Future Planning ( KRF-2017R1A2B3006141 ). Publisher Copyright: © 2019 Elsevier Ltd

PY - 2019/7

Y1 - 2019/7

N2 - The surface modification is essentially required to develop a variety of hybrid zinc oxide (ZnO) nanostructures for fabricating optoelectronic devices. A facile solution method was proposed to prepare the relatively low and high aspect ratio ZnO nanorods (NRs) and subsequently decorated with gold nanoparticles (Au NPs) partially on the surface of ZnO NRs. The Au-ZnO NRs exhibited an enhanced band-edge emission due to the surface plasmon resonance quenching of deep level defect emission, as compared to bare ZnO NRs. The UV photodetector with the relatively low aspect ratio Au-ZnO NRs showed a lower photocurrent in dark. However, after UV light illumination, a remarkable enhancement in photocurrent owing to the Au modification was observed, which leads a strong absorption and an improved interfacial charge separation process. Hence, the relatively low aspect ratio Au-ZnO NRs provides a channel for fabricating a high performance UV photodetector, in the near future.

AB - The surface modification is essentially required to develop a variety of hybrid zinc oxide (ZnO) nanostructures for fabricating optoelectronic devices. A facile solution method was proposed to prepare the relatively low and high aspect ratio ZnO nanorods (NRs) and subsequently decorated with gold nanoparticles (Au NPs) partially on the surface of ZnO NRs. The Au-ZnO NRs exhibited an enhanced band-edge emission due to the surface plasmon resonance quenching of deep level defect emission, as compared to bare ZnO NRs. The UV photodetector with the relatively low aspect ratio Au-ZnO NRs showed a lower photocurrent in dark. However, after UV light illumination, a remarkable enhancement in photocurrent owing to the Au modification was observed, which leads a strong absorption and an improved interfacial charge separation process. Hence, the relatively low aspect ratio Au-ZnO NRs provides a channel for fabricating a high performance UV photodetector, in the near future.

KW - Au-nanoparticles

KW - Photocurrent

KW - Surface plasmons

KW - UV photodetector

KW - ZnO-nanorods

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JO - Materials Research Bulletin

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Enhanced photocurrent performance of partially decorated Au nanoparticles on ZnO nanorods based UV photodetector

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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