ZnO nanowires-based flexible UV photodetector system for wearable dosimetry

Carlos García Núñez; Anastasios Vilouras; William Taube Navaraj; Fengyuan Liu; Ravinder Dahiya

doi:10.1109/JSEN.2018.2853762

ZnO nanowires-based flexible UV photodetector system for wearable dosimetry

Carlos García Núñez, Anastasios Vilouras, William Taube Navaraj, Fengyuan Liu, Ravinder Dahiya

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Abstract

This paper presents a flexible ultraviolet (UV) photodetector (PD) system based on zinc oxide (ZnO) nanowires (NWs) for wearable UV dosimetry. High-crystal quality ZnO NWs have been synthesized by chemical vapour transport (CVT) technique on c-plane sapphire substrates, and thereafter, transferred and aligned at pre-defined locations on a flexible substrate using dielectrophoresis (DEP). The accurate control over DEP parameters permitted the fabrication of large-area (wafer scale) arrays of ZnO NWs based UV PDs. Resulting PDs showed photocurrent-to-dark current ratios above 103 %, fast response times (<1 s), high sensitivity to different UV light intensities, and good stability under several UV/dark irradiation cycles. In addition, above PDs presented a robust response under extreme bending conditions, which is critical for their application in high-performance wearable UV dosimeters

Original language	English
Pages (from-to)	7881-7888
Number of pages	8
Journal	IEEE Sensors Journal
Volume	18
Issue number	19
Early online date	11 Jul 2018
DOIs	https://doi.org/10.1109/JSEN.2018.2853762
Publication status	E-pub ahead of print - 11 Jul 2018
Externally published	Yes

Keywords

ZnO nanowires
UV photodetectors
Wearable Electronics
Optoelectronics
Dielectrophoresis
Nanowire Assembly

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10.1109/JSEN.2018.2853762Licence: Unspecified

2018 06 28 Garcia Nunez at al NanowiresAccepted author manuscript, 987 KBLicence: CC BY-NC-ND

Cite this

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title = "ZnO nanowires-based flexible UV photodetector system for wearable dosimetry",

abstract = "This paper presents a flexible ultraviolet (UV) photodetector (PD) system based on zinc oxide (ZnO) nanowires (NWs) for wearable UV dosimetry. High-crystal quality ZnO NWs have been synthesized by chemical vapour transport (CVT) technique on c-plane sapphire substrates, and thereafter, transferred and aligned at pre-defined locations on a flexible substrate using dielectrophoresis (DEP). The accurate control over DEP parameters permitted the fabrication of large-area (wafer scale) arrays of ZnO NWs based UV PDs. Resulting PDs showed photocurrent-to-dark current ratios above 103 %, fast response times (<1 s), high sensitivity to different UV light intensities, and good stability under several UV/dark irradiation cycles. In addition, above PDs presented a robust response under extreme bending conditions, which is critical for their application in high-performance wearable UV dosimeters",

keywords = "ZnO nanowires, UV photodetectors, Wearable Electronics, Optoelectronics, Dielectrophoresis, Nanowire Assembly",

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T1 - ZnO nanowires-based flexible UV photodetector system for wearable dosimetry

AU - García Núñez, Carlos

AU - Vilouras, Anastasios

AU - Navaraj, William Taube

AU - Liu, Fengyuan

AU - Dahiya, Ravinder

PY - 2018/7/11

Y1 - 2018/7/11

N2 - This paper presents a flexible ultraviolet (UV) photodetector (PD) system based on zinc oxide (ZnO) nanowires (NWs) for wearable UV dosimetry. High-crystal quality ZnO NWs have been synthesized by chemical vapour transport (CVT) technique on c-plane sapphire substrates, and thereafter, transferred and aligned at pre-defined locations on a flexible substrate using dielectrophoresis (DEP). The accurate control over DEP parameters permitted the fabrication of large-area (wafer scale) arrays of ZnO NWs based UV PDs. Resulting PDs showed photocurrent-to-dark current ratios above 103 %, fast response times (<1 s), high sensitivity to different UV light intensities, and good stability under several UV/dark irradiation cycles. In addition, above PDs presented a robust response under extreme bending conditions, which is critical for their application in high-performance wearable UV dosimeters

AB - This paper presents a flexible ultraviolet (UV) photodetector (PD) system based on zinc oxide (ZnO) nanowires (NWs) for wearable UV dosimetry. High-crystal quality ZnO NWs have been synthesized by chemical vapour transport (CVT) technique on c-plane sapphire substrates, and thereafter, transferred and aligned at pre-defined locations on a flexible substrate using dielectrophoresis (DEP). The accurate control over DEP parameters permitted the fabrication of large-area (wafer scale) arrays of ZnO NWs based UV PDs. Resulting PDs showed photocurrent-to-dark current ratios above 103 %, fast response times (<1 s), high sensitivity to different UV light intensities, and good stability under several UV/dark irradiation cycles. In addition, above PDs presented a robust response under extreme bending conditions, which is critical for their application in high-performance wearable UV dosimeters

KW - ZnO nanowires

KW - UV photodetectors

KW - Wearable Electronics

KW - Optoelectronics

KW - Dielectrophoresis

KW - Nanowire Assembly

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DO - 10.1109/JSEN.2018.2853762

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EP - 7888

JO - IEEE Sensors Journal

JF - IEEE Sensors Journal

IS - 19

ER -

ZnO nanowires-based flexible UV photodetector system for wearable dosimetry

Abstract

Keywords

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