The Fabrication and Optimization of Thin-Film Transistors Based on Poly(3-Hexylthiophene) Films for Nitrogen Dioxide Detection
The Fabrication and Optimization of Thin-Film Transistors Based on Poly(3-Hexylthiophene) Films for Nitrogen Dioxide Detection
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用于二氧化氮检测的聚（3-己基噻吩）薄膜晶体管的制备和优化
DOI：
10.1109/jsen.2015.2480998
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发表时间：
2016-04
影响因子：
4.3
通讯作者：
Huiling Tai
中科院分区：
文献类型：
--
作者：
Tao Xie;Guangzhong Xie;Hongfei Du;Yong Zhou;Fabiao Xie;Yadong Jiang;Huiling Tai
聚(3-己基噻吩) (P3HT) 薄膜用作底部接触有机薄膜晶体管 (OTFT) 气体传感器的有源层，用于检测二氧化氮 (NO2)。将不同厚度的薄膜沉积在器件上，测量电流-电压特性并测试OTFT器件的气敏性能。所有制备的 OTFT 均表现出 p 型半导体行为。研究了薄膜厚度对OTFT电子特性的影响，薄膜最薄的OTFT气体传感器呈现出最好的电子特性。 P3HT薄膜较薄的OTFT气体传感器表现出较小的基线漂移，对一定浓度的NO2气体的响应较高，灵敏度增强较大。随着膜厚度从 600 nm 减小到 200 nm，灵敏度从 0.038 增加到 0.11 ppm-1（高达 190%）。 NO2的吸收改变了表面掺杂水平，从而扰乱了器件的电荷传输特性，这使得薄膜OTFT气体传感器更加灵敏。与所有器件的响应曲线和重复性曲线相比，由于基线漂移，薄膜最厚的OTFT气体传感器的响应并不精确。还研究了选择性。结果表明，由于膜厚度优化，对 NO2 的响应得到改善。此外，还分析了传感机制。
Poly(3-hexylthiophene) (P3HT) films were used as active layers in bottom contact organic thin-film transistor (OTFT) gas sensors to detect nitrogen dioxide (NO2). The films with different thicknesses were deposited on the devices to measure current-voltage characteristics and to test the gas sensing properties of the OTFT devices. All prepared OTFTs exhibited p-type semiconductor behaviors. The effect of film thickness on the electronic characteristics of OTFTs was investigated, and the OTFT gas sensor with the thinnest film presented best electronic characteristics. The OTFT gas sensors with thinner P3HT film showed smaller baseline drift, higher response to NO2 gas of a certain concentration, and larger sensitivity enhancement. The sensitivity increased from 0.038 to 0.11 ppm-1 (up to 190%) with the decrease in film thickness from 600 to 200 nm. The absorption of NO2 changed the surface doping level, and thereby perturbed the charge transport properties of the devices, which made OTFT gas sensors with thinner film more sensitive. Compared with the response curves and repeatability curves of all devices, the response of the OTFT gas sensor with the thickest film was not precise owing to the baseline drift. The selectivity was also investigated. The results demonstrated that the response to NO2 was improved due to the film thickness optimization. Moreover, the sensing mechanism was analyzed as well.
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DOI：
10.1016/j.snb.2013.09.079
发表时间：
2014-02
期刊：
Sensors and Actuators B: Chemical
影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
8.4
作者：
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