α-六噻吩OTFT器件痕量NO_2气体传感器的制备及特性研究  

Study on Preparation and Properties of Organic Thin-Film Transistors Based on α-Sexithiophene to Trace NO_2

作　　者：李娴[1] 蒋亚东[1] 谢光忠[1] 太惠玲[1] 

机构地区：[1]电子科技大学光电信息学院电子薄膜与集成器件国家重点实验室,成都610054

出　　处：《材料导报》2012年第22期16-19,34,共5页Materials Reports

基　　金：总装预研基金项目(9140A23060510DZ02);国家自然科学基金青年基金(61101031)

摘　　要：以α-六噻吩(α-sexithiophene,α-6T)为有源层,二氧化硅(SiO2)为绝缘层,钛/金(Ti/Au)为电极,分别制备了沟道宽长比为40、160和640的有机薄膜晶体管(Organic thin-film transistors,OTFT)器件。讨论了OTFT器件的宽长比对二氧化氮气敏性能的影响。结果表明,基于α-6T的OTFT器件对二氧化氮气体具有较高的实时响应;OTFT器件对二氧化氮气体的气敏性能与沟道宽长比有依赖关系,随着沟道宽长比的增大,器件的响应灵敏度提高、响应时间延长,宽长比为160的器件气敏性能最佳。Three kinds of organic thin-film transistors （OTFT） with different ratios of channel width to length were fabricated,α-sexithiophene （α-6T） and silicon dioxide （SiO2） were used as the active layer and the insulating layer, respectively, titanium/aurum （Ti/Au） were made as the electrode for the prepared OTFT,and the three ratios of channel width to length were 40, 160 and 640. The influences of α-6T OTFT devices of different channel ratios on gas sensitive properties were discussed. The results showed that the α-6T based OTFT had good real-time response to NO2, the ratio of channel width to length had effect on gas response, the response sensitivity became higher and re- sponse time became longer when the ratio of channel width to length increased, and a device with a ratio of channel width to length of 160 exhibited the optimum gas sensing property.

关 键 词：沟道宽长比 有机薄膜晶体管 二氧化氮 灵敏度 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]