Ag修饰TiO2纳米管紫外探测器的构筑及性能研究  

Fabrication and Properties of Ultraviolet Detector Based on Ag-modified TiO2 Nanotubes

作　　者：方向明[1,2] 李想 贾杰 桑丹丹 高世勇[2] FANG Xiang-ming;LI Xiang;JIA Jie;SANG Dan-dan;GAO Shi-yong(Department of Physics,Taiyuan University,Taiyuan 030032,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;Shandong Key Laboratory of Optical Communication Science and Technology,School of Physical Science andInformation Technology,Liaocheng University,Liaocheng,Shandong 252000,China)

机构地区：[1]太原学院物理系,太原030032 [2]哈尔滨工业大学材料科学与工程学院,哈尔滨150001 [3]聊城大学物理科学与信息工程学院山东省光通信科学与技术重点实验室,山东聊城252000

出　　处：《光子学报》2019年第6期190-196,共7页Acta Photonica Sinica

基　　金：山东省自然科学基金(No.ZR2017QA013);黑龙江省博士后基金(No.LBH-Q16104)~~

摘　　要：以液相沉积法在FTO衬底上制备了TiO2纳米管阵列,在室温下利用光沉积法在TiO2纳米管表面修饰金属纳米Ag颗粒,并采用SEM、EDS、XRD对样品的形貌、成分、结构等进行表征.实验结果表明,制备的TiO2纳米管分布均匀,由锐钛矿相组成,并在管壁有明显的纳米Ag颗粒附着.以Pt为对电极制备了Ag/TiO2纳米管紫外探测器,光响应测试结果表明,Ag/TiO2纳米管紫外探测器具有可见光盲特性,可以实现对紫外光的探测.与TiO2纳米管紫外探测器相比,Ag修饰TiO2纳米管紫外探测器光电流密度提高至91μA/cm^2,开关比可达2251,紫外探测性能显著提高.TiO2 nanotubes were synthesized on FTO substrate by liquid phase deposition method.Subsequently Ag particles were photodeposited on the surface of TiO2 nanotubes.Moreover the obtained array was investigated by SEM,EDS and XRD.As a result,TiO2 nanotubes exhite anatase phase,and there are obvious Ag particles attached on the surface of the tube wall.Under UV irradiation,the ultraviolet detector based on Ag/TiO2 nanotubes shown the excellent visible-blind characteristic.After a deposition of Ag,the ultraviolet detector based on Ag/TiO2 nanotubes exhibited a high on/off ratio of 2 251,together with the photocurrent density of 91μA/cm^2.

关 键 词：TIO2纳米管 AG纳米颗粒 紫外探测器 液相沉积法 光沉积法 

分 类 号：TN36[电子电信—物理电子学]