標題: UV-enhanced room-temperature ultrasensitive NO gas sensor with vertical channel nano-porous organic diodes
作者: Madhaiyan, Govindasamy
Tung, Ting-Wei
Zan, Hsiao-Wen
Meng, Hsin-Fei
Lu, Chia-Jung
Ansari, Arshiya
Chuang, Wei-Tsung
Lin, Hong-Cheu
交大名義發表
材料科學與工程學系
物理研究所
National Chiao Tung University
Department of Materials Science and Engineering
Institute of Physics
關鍵字: Organic semiconductor;Nitric oxide gas sensor;UV treatment;Photochromic molecules
公開日期: 1-Oct-2020
摘要: 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 (lambda =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.
URI: http://dx.doi.org/10.1016/j.snb.2020.128392
http://hdl.handle.net/11536/155116
DOI: 10.1016/j.snb.2020.128392
期刊: SENSORS AND ACTUATORS B-CHEMICAL
Volume: 320
起始頁: 0
結束頁: 0
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