典型文献
Nanoscale Impact Ionization and Electroluminescence in a Biased Scanning-Tunneling-Microscope Junction
文献摘要：
Electroluminescence from a p-type GaAs(110)surface was induced by tunneling electrons in a scanning tunneling microscope under both polarities of bias voltage.The optical spectra exhibit a polarity-independent luminescence peak at 1.47 eV resulting from the exciton recombination.However,the quantum yield of photon emission at negative bias voltage is two orders of magnitude weaker than that at positive bias voltage.Moreover,the luminescence at negative bias voltage shows the linear dependence of bias voltage,distinct from the rapid rise due to resonant electron injection at positive bias.Furthermore,the threshold bias voltage for electroluminescence at negative bias is nearly twice the bandgap of GaAs,not simply satisfying the energy conservation for the creation of an electron-hole pair.Through theoretical calculation,we propose an impact ionization model to nicely explain the newly observed electroluminescence at negative bias voltage.We believe that this mechanism of impact ionization could be readily applied to other nanoscale optoelectronics including 2D semiconductors and ID nanostructures.
文献关键词：
中图分类号：
作者姓名：
Lehua Gu;Shuang Wu;Shuai Zhang;Shiwei Wu
作者机构：
State Key Laboratory of Surface Physics,Key Laboratory of Micro and Nano Photonic Structures(MOE),and Department of Physics,Fudan University,Shanghai 200433,China;Shanghai Qi Zhi Institute,Shanghai 200232,China;Institute for Nanoelectronic Devices and Quantum Computing,Fudan University,Shanghai 200433,China;Shanghai Research Center for Quantum Sciences,Shanghai 201315,China
文献出处：
引用格式：
[1]Lehua Gu;Shuang Wu;Shuai Zhang;Shiwei Wu-.Nanoscale Impact Ionization and Electroluminescence in a Biased Scanning-Tunneling-Microscope Junction)[J].中国物理快报（英文版）,2022(03):99-104
A类：
Electroluminescence
B类：
Nanoscale,Impact,Ionization,Biased,Scanning,Tunneling,Microscope,Junction,from,type,GaAs,surface,was,induced,by,tunneling,electrons,scanning,microscope,under,both,polarities,bias,voltage,optical,spectra,exhibit,polarity,independent,peak,eV,resulting,exciton,recombination,However,quantum,yield,photon,emission,negative,two,orders,magnitude,weaker,than,that,positive,Moreover,shows,linear,dependence,distinct,rapid,rise,due,resonant,injection,Furthermore,threshold,electroluminescence,nearly,twice,bandgap,not,simply,satisfying,energy,conservation,creation,hole,pair,Through,theoretical,calculation,propose,impact,ionization,model,nicely,explain,newly,observed,We,believe,this,mechanism,could,readily,applied,other,nanoscale,optoelectronics,including,2D,semiconductors,ID,nanostructures
AB值：
0.646674
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