UV-enhanced room-temperature ultrasensitive NO gas sensor with vertical channel nano-porous organic diodes

Govindasamy Madhaiyan; Ting Wei Tung; Hsiao Wen Zan; Hsin Fei Meng; Chia Jung Lu; Arshiya Ansari; Wei Tsung Chuang; Hong Cheu Lin

doi:10.1016/j.snb.2020.128392

UV-enhanced room-temperature ultrasensitive NO gas sensor with vertical channel nano-porous organic diodes

Govindasamy Madhaiyan, Ting Wei Tung, Hsiao Wen Zan^*, Hsin Fei Meng, Chia Jung Lu, Arshiya Ansari, Wei Tsung Chuang, Hong Cheu Lin^*

^*Corresponding author for this work

Department of Chemistry

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

40 Citations (Scopus)

Abstract

In this work, we successfully proposed an organic semiconductor gas sensor on vertical channel design to exhibit an ultra-sensitive response to nitric oxide gas (10 ppb) at room temperature. The effect of ultra-violet (UV) irradiation (λ =365 nm) on sensing performance of solution processed vertical organic diode (VOD) has been investigated. After implementing a simple and low-cost UV treatment, the sensing response of PBDTTT-C-T based NO sensor is significantly enhanced from 93 % to 233 % at 1 ppm. In addition, we also introduced a new strategy to tune the selectivity of organic gas sensors by using photochromic molecule and organic semiconductor blends. With the 1 Wt% spiropyran dopant, the sensor response to ammonia can be considerably suppressed, hence the response ratio between NO and ammonia can be improved from 2.9 to 16.0, indicating an improved selectivity. The proposed ultrasensitive and selective NO gas sensor have great potential for exhaled breath detection (asthma patients) and environmental monitoring.

Original language	English
Article number	128392
Journal	Sensors and Actuators, B: Chemical
Volume	320
DOIs	https://doi.org/10.1016/j.snb.2020.128392
Publication status	Published - 2020 Oct 1

Keywords

Nitric oxide gas sensor
Organic semiconductor
Photochromic molecules
UV treatment

ASJC Scopus subject areas

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

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10.1016/j.snb.2020.128392

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title = "UV-enhanced room-temperature ultrasensitive NO gas sensor with vertical channel nano-porous organic diodes",

abstract = "In this work, we successfully proposed an organic semiconductor gas sensor on vertical channel design to exhibit an ultra-sensitive response to nitric oxide gas (10 ppb) at room temperature. The effect of ultra-violet (UV) irradiation (λ =365 nm) on sensing performance of solution processed vertical organic diode (VOD) has been investigated. After implementing a simple and low-cost UV treatment, the sensing response of PBDTTT-C-T based NO sensor is significantly enhanced from 93 % to 233 % at 1 ppm. In addition, we also introduced a new strategy to tune the selectivity of organic gas sensors by using photochromic molecule and organic semiconductor blends. With the 1 Wt% spiropyran dopant, the sensor response to ammonia can be considerably suppressed, hence the response ratio between NO and ammonia can be improved from 2.9 to 16.0, indicating an improved selectivity. The proposed ultrasensitive and selective NO gas sensor have great potential for exhaled breath detection (asthma patients) and environmental monitoring.",

keywords = "Nitric oxide gas sensor, Organic semiconductor, Photochromic molecules, UV treatment",

author = "Govindasamy Madhaiyan and Tung, {Ting Wei} and Zan, {Hsiao Wen} and Meng, {Hsin Fei} and Lu, {Chia Jung} and Arshiya Ansari and Chuang, {Wei Tsung} and Lin, {Hong Cheu}",

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year = "2020",

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doi = "10.1016/j.snb.2020.128392",

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T1 - UV-enhanced room-temperature ultrasensitive NO gas sensor with vertical channel nano-porous organic diodes

AU - Madhaiyan, Govindasamy

AU - Tung, Ting Wei

AU - Zan, Hsiao Wen

AU - Meng, Hsin Fei

AU - Lu, Chia Jung

AU - Ansari, Arshiya

AU - Chuang, Wei Tsung

AU - Lin, Hong Cheu

PY - 2020/10/1

Y1 - 2020/10/1

N2 - In this work, we successfully proposed an organic semiconductor gas sensor on vertical channel design to exhibit an ultra-sensitive response to nitric oxide gas (10 ppb) at room temperature. The effect of ultra-violet (UV) irradiation (λ =365 nm) on sensing performance of solution processed vertical organic diode (VOD) has been investigated. After implementing a simple and low-cost UV treatment, the sensing response of PBDTTT-C-T based NO sensor is significantly enhanced from 93 % to 233 % at 1 ppm. In addition, we also introduced a new strategy to tune the selectivity of organic gas sensors by using photochromic molecule and organic semiconductor blends. With the 1 Wt% spiropyran dopant, the sensor response to ammonia can be considerably suppressed, hence the response ratio between NO and ammonia can be improved from 2.9 to 16.0, indicating an improved selectivity. The proposed ultrasensitive and selective NO gas sensor have great potential for exhaled breath detection (asthma patients) and environmental monitoring.

AB - In this work, we successfully proposed an organic semiconductor gas sensor on vertical channel design to exhibit an ultra-sensitive response to nitric oxide gas (10 ppb) at room temperature. The effect of ultra-violet (UV) irradiation (λ =365 nm) on sensing performance of solution processed vertical organic diode (VOD) has been investigated. After implementing a simple and low-cost UV treatment, the sensing response of PBDTTT-C-T based NO sensor is significantly enhanced from 93 % to 233 % at 1 ppm. In addition, we also introduced a new strategy to tune the selectivity of organic gas sensors by using photochromic molecule and organic semiconductor blends. With the 1 Wt% spiropyran dopant, the sensor response to ammonia can be considerably suppressed, hence the response ratio between NO and ammonia can be improved from 2.9 to 16.0, indicating an improved selectivity. The proposed ultrasensitive and selective NO gas sensor have great potential for exhaled breath detection (asthma patients) and environmental monitoring.

KW - Nitric oxide gas sensor

KW - Organic semiconductor

KW - Photochromic molecules

KW - UV treatment

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UV-enhanced room-temperature ultrasensitive NO gas sensor with vertical channel nano-porous organic diodes

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Keywords

ASJC Scopus subject areas

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