摘要
首先利用电化学阳极氧化方法在钛箔上合成整齐有序的TiO2纳米管阵列(TNA);然后采用电化学沉积的方法在纳米管表面均匀沉积高功函数的Pt纳米颗粒以构建Pt/TNA肖特基结,通过SEM、EDS和XRD等表征方法研究了Pt/TNA肖特基结的表面形貌和结构;最后通过测试不同光照强度下的电压-电流(V-I)和电流-时间(I-t)曲线研究了Pt/TNA肖特基结的紫外光电性能。实验发现,在1V偏压和光照强度为1.37mW/cm2的375nm紫外光照射下,Pt/TNA肖特基结的光电流可达3.71μA,响应度为0.015A/W,外量子效率为5.11%,光响应因子高达1 892.8,表明紫外光电探测性能得到显著提高。
Highly ordered TiO_2 nanotube arrays（TNA）were fabricated by electrochemical anodic oxidation method on Ti foil.Then an electrochemical deposition method was applied to deposit Pt nanoparticles with high work function on surface of the TiO_2 nanotube arrays to form Pt/TNA Schottky junction.Pt/TNA Schottky junction was characterized by SEM,EDS and XRD.The photoelectric performance of Pt/TNA Schottky junction was researched by testing voltage-current（V-I）and current-time（I-t）curves under different light intensity.The photocurrent of 3.71μA,responsivity of 0.015 A/W,external quantum efficiency of 5.11% and photoresponse factor of 1 892.8 were realized under 375 nm UV illumination（1.37 mW/cm2）at a forward bias of 1 V.
作者
程宏伟
李刚
郭丽芳
程再军
CHENG Hongwei;LI Gang;G-UO Lifang;CHENG Zaijun(Micronano System Research Center,College of Information Engin.＆ Key Lab.of Adv.Transducers and Intelligent Control System of the Ministry of Education,Taiyuan University of Technol.,Taiyuan 030024,CHN;School of Optoelectronie and Communication Engin.,Xiamen University of Technol.,Xiamen 361024,CHN)
出处
《半导体光电》
CAS
北大核心
2018年第5期694-699,共6页
Semiconductor Optoelectronics
基金
国家自然科学基金项目(61674113,51622507,61471255)
山西省自然科学基金项目(2014011019-1,20141001021-2,2016011040)
山西省回国留学人员科研项目(2013-036)
山西省人社厅留学人员择优项目([2013]251)
人社部留学人员择优项目([2014]240)
山西省高校科技创新研究项目(2016138)
关键词
电化学阳极氧化
二氧化钛纳米管
铂
紫外探测
光响应
electrochemical anodic oxidation
TiO2 nanotubes
Pt
ultraviolet detection
photoresponse
