Ultraviolet sensor with fast response characteristics based on an AgNW/ZnO bi-layer

Mun Bae Jeon; Yeon Hwa Kwak; Byeong Kwon Ju; Kunnyun Kim

doi:10.1016/j.sna.2020.112044

Ultraviolet sensor with fast response characteristics based on an AgNW/ZnO bi-layer

Mun Bae Jeon, Yeon Hwa Kwak, Byeong Kwon Ju^*, Kunnyun Kim

^*Corresponding author for this work

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

15 Citations (Scopus)

Abstract

We demonstrate an ultraviolet (UV) sensor with fast response characteristics based on an AgNW/ZnO bi-layer. This UV sensor is a surface acoustic wave (SAW)-based sensor fabricated using a 128°YX black lithium niobate substrate, which is a piezoelectric in nature. This sensor, which is a two-port SAW resonator, was manufactured by fabricating interdigitated electrodes with a wavelength of 16.4 μm and depositing UV sensing layers such as ZnO, Sn/ZnO, and AgNW/ZnO. Among these sensing layers, the frequency response characteristics were found to be improved in the bi-layer structure. In addition, the AgNW/ZnO-based sensor showed a significant improvement in response and recovery times. These results contributed to rapid oxygen adsorption on the ZnO surface due to the large oxygen contact area that can attributed to the AgNW's 3D mesh structure and the compensation of the internal electron trap center due to the contact of the metal-semiconductor. The proposed sensor with the metal-semiconductor bi-layer structure based on AgNW nanomaterials showed the fastest response characteristics compared to previous SAW UV sensors.

Original language	English
Article number	112044
Journal	Sensors and Actuators, A: Physical
Volume	311
DOIs	https://doi.org/10.1016/j.sna.2020.112044
Publication status	Published - 2020 Aug 15

Bibliographical note

Funding Information:
This research was supported by Multi-Ministry Collaborative R&D Program (Development of Techniques for Identification and Analysis of Gas Molecules to Protect Against Toxic Substances) through the National Research Foundation of Korea (NRF) funded by KNPA, MSIT, MOTIE, ME, NFA ( 2017M3D9A1073539 ) and also by the R&D program of MOTIE/KEIT [10064078, Developments of the Multi-Sensor for UV, Ambient Light, and Proximity for Next Smart Device].

Funding Information:
This research was supported by Multi-Ministry Collaborative R&D Program (Development of Techniques for Identification and Analysis of Gas Molecules to Protect Against Toxic Substances) through the National Research Foundation of Korea (NRF) funded by KNPA, MSIT, MOTIE, ME, NFA (2017M3D9A1073539) and also by the R&D program of MOTIE/KEIT [10064078, Developments of the Multi-Sensor for UV, Ambient Light, and Proximity for Next Smart Device].

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

Acoustoelectric effect
Response characteristics
Silver nanowire
Surface acoustic wave
Ultraviolet
Zinc oxide

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering

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10.1016/j.sna.2020.112044

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@article{1fdc18d5611b4c45982e3ab2123ce604,

title = "Ultraviolet sensor with fast response characteristics based on an AgNW/ZnO bi-layer",

abstract = "We demonstrate an ultraviolet (UV) sensor with fast response characteristics based on an AgNW/ZnO bi-layer. This UV sensor is a surface acoustic wave (SAW)-based sensor fabricated using a 128°YX black lithium niobate substrate, which is a piezoelectric in nature. This sensor, which is a two-port SAW resonator, was manufactured by fabricating interdigitated electrodes with a wavelength of 16.4 μm and depositing UV sensing layers such as ZnO, Sn/ZnO, and AgNW/ZnO. Among these sensing layers, the frequency response characteristics were found to be improved in the bi-layer structure. In addition, the AgNW/ZnO-based sensor showed a significant improvement in response and recovery times. These results contributed to rapid oxygen adsorption on the ZnO surface due to the large oxygen contact area that can attributed to the AgNW's 3D mesh structure and the compensation of the internal electron trap center due to the contact of the metal-semiconductor. The proposed sensor with the metal-semiconductor bi-layer structure based on AgNW nanomaterials showed the fastest response characteristics compared to previous SAW UV sensors.",

keywords = "Acoustoelectric effect, Response characteristics, Silver nanowire, Surface acoustic wave, Ultraviolet, Zinc oxide",

author = "Jeon, \{Mun Bae\} and Kwak, \{Yeon Hwa\} and Ju, \{Byeong Kwon\} and Kunnyun Kim",

note = "Funding Information: This research was supported by Multi-Ministry Collaborative R\&D Program (Development of Techniques for Identification and Analysis of Gas Molecules to Protect Against Toxic Substances) through the National Research Foundation of Korea (NRF) funded by KNPA, MSIT, MOTIE, ME, NFA ( 2017M3D9A1073539 ) and also by the R\&D program of MOTIE/KEIT [10064078, Developments of the Multi-Sensor for UV, Ambient Light, and Proximity for Next Smart Device]. Funding Information: This research was supported by Multi-Ministry Collaborative R\&D Program (Development of Techniques for Identification and Analysis of Gas Molecules to Protect Against Toxic Substances) through the National Research Foundation of Korea (NRF) funded by KNPA, MSIT, MOTIE, ME, NFA (2017M3D9A1073539) and also by the R\&D program of MOTIE/KEIT [10064078, Developments of the Multi-Sensor for UV, Ambient Light, and Proximity for Next Smart Device]. Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2020",

month = aug,

day = "15",

doi = "10.1016/j.sna.2020.112044",

language = "English",

volume = "311",

journal = "Sensors and Actuators, A: Physical",

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T1 - Ultraviolet sensor with fast response characteristics based on an AgNW/ZnO bi-layer

AU - Jeon, Mun Bae

AU - Kwak, Yeon Hwa

AU - Ju, Byeong Kwon

AU - Kim, Kunnyun

N1 - Funding Information: This research was supported by Multi-Ministry Collaborative R&D Program (Development of Techniques for Identification and Analysis of Gas Molecules to Protect Against Toxic Substances) through the National Research Foundation of Korea (NRF) funded by KNPA, MSIT, MOTIE, ME, NFA ( 2017M3D9A1073539 ) and also by the R&D program of MOTIE/KEIT [10064078, Developments of the Multi-Sensor for UV, Ambient Light, and Proximity for Next Smart Device]. Funding Information: This research was supported by Multi-Ministry Collaborative R&D Program (Development of Techniques for Identification and Analysis of Gas Molecules to Protect Against Toxic Substances) through the National Research Foundation of Korea (NRF) funded by KNPA, MSIT, MOTIE, ME, NFA (2017M3D9A1073539) and also by the R&D program of MOTIE/KEIT [10064078, Developments of the Multi-Sensor for UV, Ambient Light, and Proximity for Next Smart Device]. Publisher Copyright: © 2020 Elsevier B.V.

PY - 2020/8/15

Y1 - 2020/8/15

N2 - We demonstrate an ultraviolet (UV) sensor with fast response characteristics based on an AgNW/ZnO bi-layer. This UV sensor is a surface acoustic wave (SAW)-based sensor fabricated using a 128°YX black lithium niobate substrate, which is a piezoelectric in nature. This sensor, which is a two-port SAW resonator, was manufactured by fabricating interdigitated electrodes with a wavelength of 16.4 μm and depositing UV sensing layers such as ZnO, Sn/ZnO, and AgNW/ZnO. Among these sensing layers, the frequency response characteristics were found to be improved in the bi-layer structure. In addition, the AgNW/ZnO-based sensor showed a significant improvement in response and recovery times. These results contributed to rapid oxygen adsorption on the ZnO surface due to the large oxygen contact area that can attributed to the AgNW's 3D mesh structure and the compensation of the internal electron trap center due to the contact of the metal-semiconductor. The proposed sensor with the metal-semiconductor bi-layer structure based on AgNW nanomaterials showed the fastest response characteristics compared to previous SAW UV sensors.

AB - We demonstrate an ultraviolet (UV) sensor with fast response characteristics based on an AgNW/ZnO bi-layer. This UV sensor is a surface acoustic wave (SAW)-based sensor fabricated using a 128°YX black lithium niobate substrate, which is a piezoelectric in nature. This sensor, which is a two-port SAW resonator, was manufactured by fabricating interdigitated electrodes with a wavelength of 16.4 μm and depositing UV sensing layers such as ZnO, Sn/ZnO, and AgNW/ZnO. Among these sensing layers, the frequency response characteristics were found to be improved in the bi-layer structure. In addition, the AgNW/ZnO-based sensor showed a significant improvement in response and recovery times. These results contributed to rapid oxygen adsorption on the ZnO surface due to the large oxygen contact area that can attributed to the AgNW's 3D mesh structure and the compensation of the internal electron trap center due to the contact of the metal-semiconductor. The proposed sensor with the metal-semiconductor bi-layer structure based on AgNW nanomaterials showed the fastest response characteristics compared to previous SAW UV sensors.

KW - Acoustoelectric effect

KW - Response characteristics

KW - Silver nanowire

KW - Surface acoustic wave

KW - Ultraviolet

KW - Zinc oxide

UR - https://www.scopus.com/pages/publications/85085840828

U2 - 10.1016/j.sna.2020.112044

DO - 10.1016/j.sna.2020.112044

M3 - Article

AN - SCOPUS:85085840828

SN - 0924-4247

VL - 311

JO - Sensors and Actuators, A: Physical

JF - Sensors and Actuators, A: Physical

M1 - 112044

ER -

Ultraviolet sensor with fast response characteristics based on an AgNW/ZnO bi-layer

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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