Electron emission through a multilayer planar nanostructured solid-state field-controlled emitter

Semet, V.; Vu Thien Binh; Zhang, J.P.; Yang, J.; Khan, M. Asif; Tsu, R.
March 2004
Applied Physics Letters;3/15/2004, Vol. 84 Issue 11, p1937
Academic Journal
We have measured the field electron emission (FE) from a surface covered with two ultrathin layers of semiconductor, 4 nm GaN on 2 nm Al[sub 0.5]Ga[sub 0.5]N. The threshold field was 50 V/μm, with stable FE current densities up to 3×10[sup -2] A/cm[sup 2]. We have also measured the FE dependence with field and temperature and determine then an effective surface tunneling barrier ≤0.5 eV, coexisting with an effective thermal activation energy of ∼0.85 eV. To interpret these experimental results, we propose a dual-barrier model, related to the nanostructured layers, with a serial two-step mechanism for the electron emission, taking into account the space charge formation in the quantum well structure at the surface. © 2004 American Institute of Physics.


Related Articles

  • Field Emission Properties and Fabrication of CdS Nanotube Arrays. Xuemin Qian; Huibiao Liu; Yanbing Guo; Shiqun Zhu; Yinglin Song; Yuliang Li // Nanoscale Research Letters;Aug2009, Vol. 4 Issue 8, p955 

    A large area arrays (ca. 40 cm2) of CdS nanotube on silicon wafer are successfully fabricated by the method of layer-by-layer deposition cycle. The wall thicknesses of CdS nanotubes are tuned by controlling the times of layer-by-layer deposition cycle. The field emission (FE) properties of CdS...

  • A solid-state process for formation of boron nitride nanotubes. Ying Chen; Chadderton, Lewis T.; Gerald, John Fitz; Williams, James S. // Applied Physics Letters;5/17/1999, Vol. 74 Issue 20, p2960 

    Studies the formation of boron nitride nanotubes via a solid-state process. Amorphous nanostructures produced by the nanotubes; Nucleation resulting from annealing; Growth of boron nitride nanotubes; Comparison with previous mechanism for nanotube formation.

  • Editorial. Pandey, Avinash C.; Sharma, Prashant K. // Advanced Materials Letters;Oct2011, Vol. 2 Issue 4, p245 

    An introduction is presented in which the editors discuss various reports within the issue that have been taken from papers presented in the "4th International Conference, INDIAS 2010," held in India, on topics including nanomaterials, condensed materials, and solid states sciences.

  • Field-induced hot-electron emission model for wide-band-gap semiconductor nanostructures. Zeng, J. Z.; Deng, S. Z.; She, J. C.; He, H.; Xu, N. S. // Journal of Applied Physics;Sep2010, Vol. 108 Issue 5, p054305 

    For field emission from wide-band-gap semiconductor nanostructures, nonlinear plots on Fowler-Nordheim (FN) coordinates and unacceptably large field enhancement factors (βFN) are often obtained by fitting based on FN equation. In the present work, the field-induced hot-electron emission model...

  • Field Electron Emission from Ge�Si Nanostructures with Quantum Dots. Dadykin, A. A.; Kozyrev, Yu. N.; Naumovets, A. G. // JETP Letters;10/10/2002, Vol. 76 Issue 7, p472 

    Self-assembled arrays of Ge�Si clusters with sizes of ~ 10 nm and a density of ~ 10[sup 10]cm[sup �2] have been grown by molecular beam epitaxy. Stable steady-state field electron emission from such clusters has been observed and studied. The emission is characterized by resonance...

  • Two field-emission states of single-walled carbon nanotubes. Collazo, R.; Schlesser, R.; Sitar, Z. // Applied Physics Letters;4/2/2001, Vol. 78 Issue 14, p2058 

    Two field-emission states of single-walled carbon nanotubes have been identified according to their respective emission current levels. The state yielding increased emission current has been attributed to the presence of adsorbates on the nanotubes. It was realized that, by application of high...

  • Field emission of comb-like chromium disilicide nanowires prepared by an in situ chloride-generated route. Hu, Yemin; Hu, Zheng; Yu, Leshu; Li, Ying; Zhu, Mingyuan; Bai, Qin // Applied Physics A: Materials Science & Processing;Apr2011, Vol. 103 Issue 1, p67 

    Large-area comb-like chromium disilicide (CrSi) nanowire film has been successfully synthesized on silicon wafer through an in situ chloride-generated route. The sample possesses branch-like nanowires grown out perpendicularly and evenly from both sides of a stem-like microrod, forming 2-fold...

  • Field emission of electrons from a single carbon fiber with a nanostructured emitting surface. Lupekhin, S.; Ibragimov, A. // Technical Physics;Jan2012, Vol. 57 Issue 1, p119 

    The field emission of electrons from a single fine carbon fiber with a nanostructured emitting surface is studied experimentally. It is found that the fiber can serve as an effective field emitter of electrons at voltages of ∼10-10 under the conditions of technical vacuum and the emission...

  • Influence ofsp 3 fraction on the field emission properties of tetrahedral amorphous carbon films formed by magnetic filtered plasma stream. Chen, D.H.; Li, Z.Y.; Wei, A.X. // Applied Physics A: Materials Science & Processing;Apr2005, Vol. 80 Issue 7, p1573 

    Electron field emission properties of tetrahedral amorphous carbon films (ta-C) with various sp3 fractions, [sp3]/([sp2]+[sp3]), prepared by magnetic filtered plasma deposition system, were investigated. The ta-C films were deposited on (100) n-Si wafer with a resistivity of 0.01-0.02 O?cm in a...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics