典型文献
TiO2-assisted GaN-nanowire-based stable ultraviolet photoelectrochemical detection
文献摘要：
Ultraviolet photodetection plays an important role in optical communication and chemical-and bio-related sensing applications.Gallium nitride(GaN)nanowires-based photoelectrochemical-type photodetectors,which operate particularly in acqueous conditions,have been attracted extensive interest because of their low cost,fast photoresponse,and excellent responsivity.However,GaN nanowires,which have a large surface-to-volume ratio,suffer suffered from in-stability in photoelectrochemical environments because of photocorrosion.In this study,the structural and photoelectro-chemical properties of GaN nanowires with improved photoresponse and chemical stability obtained by coating the nanowire surface with an ultrathin TiO2 protective layer were investigated.The photocurrent density of TiO2-coated GaN nanowires changed minimally over a relatively long operation time of 2000 s under 365-nm illumination.Meanwhile,the attenuation coefficient of the photocurrent density could be reduced to 49％,whereas it is as high as 85％in uncoated GaN nanowires.Furthermore,the photoelectrochemical behavior of the nanowires was investigated through electrochemical im-pedance spectroscopy measurements.The results shed light on the construction of long-term-stable GaN-nanowire-based photoelectrochemical-type photodetectors.
文献关键词：
中图分类号：
作者姓名：
Yang Kang;Xin Liu;Danhao Wang;Shi Fang;Yuanmin Luo;Haiding Sun
作者机构：
School of Microelectronics,University of Science and Technology of China,Hefei 230029,China
文献出处：
引用格式：
[1]Yang Kang;Xin Liu;Danhao Wang;Shi Fang;Yuanmin Luo;Haiding Sun-.TiO2-assisted GaN-nanowire-based stable ultraviolet photoelectrochemical detection)[J].中国科学技术大学学报,2022(01):13-19
A类：
acqueous,pedance
B类：
TiO2,assisted,GaN,stable,ultraviolet,photoelectrochemical,Ultraviolet,photodetection,plays,important,role,optical,communication,bio,related,sensing,applications,Gallium,nitride,nanowires,type,photodetectors,which,operate,particularly,conditions,have,been,attracted,extensive,interest,because,their,low,cost,fast,photoresponse,excellent,responsivity,However,large,surface,volume,suffered,from,stability,environments,photocorrosion,In,this,study,structural,properties,improved,obtained,by,coating,ultrathin,protective,layer,were,investigated,photocurrent,density,changed,minimally,over,relatively,long,operation,under,illumination,Meanwhile,attenuation,coefficient,could,reduced,whereas,high,uncoated,Furthermore,behavior,was,through,spectroscopy,measurements,results,shed,light,construction,term
AB值：
0.544742
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