Modulated gas sensor based on vertical organic diode with blended channel for ppb-regime detection

被引：23
作者：
Chuang, Ming-Yen [1 ,2 ]
Chen, Jian-Nan [3 ]
Zan, Hsiao-Wen [1 ,2 ]
Lu, Chia-Jung [4 ]
Meng, Hsin-Fei [5 ]
机构：
[1] Natl Chiao Tung Univ, Dept Photon, 1001 Ta Hsueh Rd, Hsinchu 300, Taiwan
[2] Natl Chiao Tung Univ, Inst Electroopt Engn, 1001 Ta Hsueh Rd, Hsinchu 300, Taiwan
[3] Natl Chiao Tung Univ, Inst Elect Engn, 101 Kuang Fu Rd,Sect 2, Hsinchu 300, Taiwan
[4] Natl Taiwan Normal Univ, Dept Chem, 162 Heping East Rd,Sect 1, Taipei 106, Taiwan
[5] Natl Chiao Tung Univ, Inst Phys, 1001 Ta Hsueh Rd, Hsinchu 300, Taiwan
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2016年 / 230卷
关键词：
Gas sensor; PCBM; P3HT; Vertical; Blended; Ammonia; SENSING PROPERTIES; CATHODE; P3HT/PCBM; ARRAYS; LAYER;
D O I：
10.1016/j.snb.2016.02.030
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
We demonstrate an extremely sensitive ammonia gas sensor based on vertical organic diode to exhibit a 1 ppb detection limit. Using phenyl-C61-butyric acid methyl ester (PCBM) as the sensing layer, the nano porous structure enlarges the surface to volume ratio and hence realizes the ppb-regime sensitivity. The proposed vertical nano-junction (VNJ) organic diode is then investigated by changing the semiconducting materials (i.e. sensing material). In addition to a pure n-type or p-type sensing material, the blend of n/p organic semiconductor (PCBM/P3HT) is used to react with gas. Changing the n/p blending ratio from 0 to 100% delivers a tunable gas response to ammonia and nitric oxide, hence demonstrating a sensing map concept with good selectivity. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：223 / 230
页数：8
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