摘要
基于p-n结的光生伏特效应可构筑性能优异的UV探测器,本文采用水热法可控制备竖直排列的氧化锌纳米棒阵列(n型ZnO-NRs),利用原位聚合法在ZnO-NRs表面上修饰p型聚苯胺线膜(PANI-NWs),再组装成ZnO-NRs与ZnO-NRs/PANI-NWs紫外探测器。通过扫描电镜(SEM)、X射线衍射仪(XRD)、紫外可见漫反射(UV-Vis)光谱表征样品的形貌、结构与光学性质。并通过电化学工作站测定电流-时间(I-t)和电流电压(I-V)曲线,表征其光响应性能。结果表明,制备的ZnO-NRs/PANI-NWs材料阵列排列整齐,界面接触良好,孔隙均匀。ZnO-NRs/PANI-NWs探测器在检测365 nm紫外光时,光电流为2.73×10^-4 A;检测254 nm紫外光时,光电流为1.44×10^-4 A。其光电流为ZnO-NRs探测器的4~10倍,ZnO-NRs和PANI-NWs之间形成的p-n结增强了光电导。用ZnO-NRs/PANI-NWs材料组装成的UV探测器体现出稳定性好,响应速度快,恢复时间短,电流增益高等优点,为开发高性能紫外光电探测器提供数据支撑。
Based on the photovoltage effect of p-n junction,UV detectors with excellent performance can be constructed.In this paper,vertically aligned ZnO nanorod arrays(n-type)ZnO-NRs were controllable prepared by hydrothermal method.The p-type polyaniline(PANI-NWs)was modified on the surface of ZnO-NRs by in-situ polymerization,and then assembled into ZnO-NRs and ZnO-NRs/PANI-NWs UV detectors.The morphology,structure and optical properties of the samples were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and UV-Vis diffuse reflection spectroscopy.The current time(I-t)and current voltage(I-V)curves were measured by electrochemical workstation to characterize the light response properties.The results show that the ZnO-NRs/PANI-NW smaterials are arranged orderly,the interface contact is good,and the pores are uniform.When the ZnO-NRs/PANI-NWs detector detects 365 nm ultraviolet light,the photocurrent can reach 2.73×10^-4 A;at 254 nm,the photocurrent can reach 1.44×10^-4 A,and its peak value is 4 tO10 times that of ZnO-NRs detector.The increase of photoconductivity is closely related to the p-n junction formed between ZnO-NRs and PANI-NWs.The UV detector assembled with ZnO-NRs/PANI-NWs material shows good stability,fast corresponding speed,short recovery time and high current gain,which provides data support for the development of high performance.
作者
王建超
杨光慧
唐格格
麻明友
彭华勇
WANG Jianchao;YANG Guanghui;TANG Gege;MA Mingyou;PENG Huayong(School of Pharmaceutical Sciences,Jishou University,Jishou 416000,China;The Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology,Jishou 416000,China;Hunan Engineering Laboratory for Analyse and Drugs Development of Ethnomedicine in Wuling Mountains,Jishou University,Jishou 416000,China;Laboratory and Equipment Administration Center,Jishou University,Jishou 416000,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2021年第1期88-93,共6页
Journal of Synthetic Crystals
基金
湖南省教育厅科学研究项目(20C1543)
吉首大学校级科研项目(Jd19004,Jdx19012)
2018年湖南省锰锌钒产业技术协同创新中心本科生科研创新项目。
关键词
导电聚苯胺
ZNO纳米棒阵列
水热法
P-N结
光生伏特效应
紫外探测性能
conducting polyaniline
ZnO nanorod array
hydrothermal method
p-n junction
photovoltaic effect
UV detection performance
