PEDOT∶PSS/TiO2纳米管肖特基结的制备及紫外探测性能  

Preparation and Ultraviolet Detection Performances of PEDOT∶ PSS/TiO2 Nanotubes Schottky Junction

作　　者：刘茹茹[1] 洪锋[1,2] 鲁昌华 蒋薇薇[2] 鞠薇[2] Liu Ruru;Hong Feng;Lu Changhua;Jiang Weiwei;Ju Wei(College of Electrical and Mechanical Engineering,Chizhou University,Chizhou 247000,China;College of Computer and Information,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]池州学院机电工程学院,安徽池州247000 [2]合肥工业大学计算机与信息学院,合肥230009

出　　处：《半导体技术》2018年第10期745-751,共7页Semiconductor Technology

基　　金：国家重大仪器开发专项计划(2013YQ220643);安徽省科技攻关资助项目(1401b042002);安徽省高校优秀青年人才项目(gxyq2018110);池州学院自然重点项目(2014ZRCZ004,2015ZRCZ004)

摘　　要：利用电化学阳极氧化方法制备了高度有序的TiO2纳米管阵列,采用旋涂方法在纳米管表面制作一层聚（3,4-亚乙二氧基噻吩）∶聚（苯乙烯磺酸）（PEDOT∶PSS）薄膜构建PEDOT∶PSS/TiO2纳米管肖特基结并研究了其紫外探测性能。通过扫描电子显微镜（SEM）对TiO2纳米管和PEDOT∶PSS进行表面微观形貌表征。通过测试不同光照强度、不同偏压下的电压-电流和电流-时间曲线研究PEDOT∶PSS/TiO2纳米管肖特基结在紫外光（UV）下的光电探测性能。由于TiO2纳米管较高的比表面积和PEDOT∶PSS较高的透射率,PEDOT∶PSS/TiO2纳米管肖特基结具有优良的紫外光电探测性能。实验发现,在1 V偏压和光照强度为2. 14 m W/cm2的375 nm紫外光照射下,PEDOT∶PSS/TiO2纳米管肖特基结的光电流可达973. 5μA,响应度为2. 23 A/W,外量子效率高达736. 5%。实验结果表明PEDOT∶PSS/TiO2纳米管肖特基结的紫外探测结构性能良好。A highly ordered TiO2 nanotube array was prepared by electrochemical anodic oxidation.A layer of poly（ 3,4-ethylenedioxy thiophene） ∶ poly（ styrenesulfonate）（ PEDOT∶ PSS） film was prepared on the surface of the nanotube by spin coating to form a PEDOT∶ PSS/TiO2 nanotube Schottky junction and its UV detection performance was investigated. The surface micromorphologis of TiO2 nanotubes and PEDOT∶ PSS were characterized by the scanning electron microscopy（ SEM）. The photodetection performances of PEDOT ∶ PSS/TiO2 nanotubes Schottky junction under ultraviolet light（ UV）were studied by testing the voltage-current and current-time curves under different light intensities and different bias voltages. Due to the higher specific surface area of TiO2 nanotubes and the higher transmittance of PEDOT∶ PSS,the PEDOT∶ PSS/TiO2 nanotube Schottky junction exhibited excellent UV photodetection performances. The experimental results show that the photocurrent,responsivity and extemalquantum efficiency of the PEDOT∶ PSS/TiO2 nanotubes Schottky junction are 973. 5 μA,2. 23 A/W and736. 5% respectively at 1 V bias voltage and 375 nm UV light with a light intensity of 2. 14 m W/cm2.The results indicate that the UV detection structure of the PEDOT∶ PSS/TiO2 nanotube Schottky junction has a good performance.

关 键 词：TIO2纳米管 电化学阳极氧化 肖特基结 紫外探测 聚(3 4-亚乙二氧基噻吩)∶聚(苯乙烯磺酸)(PEDOT∶PSS) 

分 类 号：TN304.21[电子电信—物理电子学] TN304.52