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合肥工业大学 光电技术研究院 特种显示技术国家工程实验室, 测量理论与精密仪器安徽省重点实验室, 安徽 合肥 230009
[ "王冠龙(1996—),男,山东济南人,硕士研究生,2019年于济南大学获得学士学位,主要从事有机场效应晶体管及其传感特性方面的研究。E-mail: dragon1008@foxmail.com" ]
[ "邱龙臻(1980—),男,福建宁化人,博士,研究员,2006年于中国科学技术大学获得博士学位,主要从事有机光电材料及器件、印刷电子、柔性/弹性电子方面的研究。E-mail: lzhqiu@hfut.edu.cn" ]
收稿日期:2022-03-30,
修回日期:2022-04-21,
纸质出版日期:2022-07-05
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王冠龙, 王晓鸿, 邱龙臻. 基于三组分共轭聚合物的高灵敏度有机晶体管二氧化氮传感器[J]. 液晶与显示, 2022,37(7):797-805.
Guan-long WANG, Xiao-hong WANG, Long-zhen QIU. High sensitivity organic transistor nitrogen dioxide sensor based on three component conjugated polymer[J]. Chinese journal of liquid crystals and displays, 2022, 37(7): 797-805.
王冠龙, 王晓鸿, 邱龙臻. 基于三组分共轭聚合物的高灵敏度有机晶体管二氧化氮传感器[J]. 液晶与显示, 2022,37(7):797-805. DOI: 10.37188/CJLCD.2022-0101.
Guan-long WANG, Xiao-hong WANG, Long-zhen QIU. High sensitivity organic transistor nitrogen dioxide sensor based on three component conjugated polymer[J]. Chinese journal of liquid crystals and displays, 2022, 37(7): 797-805. DOI: 10.37188/CJLCD.2022-0101.
研究了基于联噻吩-氮杂异靛蓝-双(2-氧代二氢-7-氮杂吲哚-3-亚基)苯并二呋喃二酮的三组分给体-受体共轭聚合物(BTNIDNBIBDF-50)薄膜对二氧化氮气体传感特性。通过控制半导体浓度调控半导体薄膜表面形貌,研究其对二氧化氮气体灵敏度的影响。聚合物半导体BTNIDNBIBDF-50的浓度为2 mg/mL时对NO
2
气体表现出最优的传感性能,对体积分数为10×10
-6
NO
2
气体的灵敏度为121.44%。实验结果表明:三组分共轭聚合物BTNIDNBIBDF-50呈现双极型半导体特性,降低聚合物半导体浓度会使薄膜表面出现明显的孔洞结构,提高传感器对NO
2
气体的灵敏度。但过多的孔洞又会使气体解吸附速率的变化大于吸附速率变化,导致传感器灵敏度降低。
A three-component donor-acceptor conjugated polymer (BTNIDNBIBDF-50) film based on dithiophene-aza-isoindigo-bis(2-oxodihydro-7-azaindol-3-ylidene)benzodifurandione was investigated for the sensing characteristics of nitrogen dioxide gas. The effect of semiconductor concentration on the sensitivity of nitrogen dioxide was studied by controlling the morphology of semiconductor film. The polymer semiconductor BTNIDNBIBDF-50 showed the best sensing performance for NO
2
gas at a concentration of 2 mg/mL, and the sensitivity for NO
2
gas at 10×10
-6
(volum fraction) was 121.44%. The experimental results show that bipolar semiconductor polymer BTNIDNBIBDF-50 shows ambipolar charge transport characteristics. Reducing the concentration of the polymer semiconductor will lead to obvious holes on the surface of the film and improve the sensitivity of the sensor to NO
2
gas. However, the excessive porosity can cause the change in gas desorption rate to be greater than the change in adsorption rate, leading to the decrease of sensor sensitivity.
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