Injection and Emission of Hot Electrons in Thin‐Film Tunnel Emitters
作者:
E. D. Savoye,
D. E. Anderson,
期刊:
Journal of Applied Physics
(AIP Available online 1967)
卷期:
Volume 38,
issue 8
页码: 3245-3265
ISSN:0021-8979
年代: 1967
DOI:10.1063/1.1710096
出版商: AIP
数据来源: AIP
摘要:
Results of studies of Al‐Al2O3‐(Au or Al) thin‐film emission diodes are in agreement with a model based on electron injection by internal TF emission with subsequent energy loss in the insulating film, characterized by isotropic scattering with energy loss &Dgr;E=0.1 eV and mean free path &lgr;i=6 Å. The experimental results for Au overlayer films are found to be consistent with a modified ballistic transport model allowing weak elastic interactions, with a value for the electron‐electron scattering mean free path at 7.0‐V bias of &lgr;e∼47 Å. Low‐energy electron bombardment of the thin‐film sample is found to allow detection of overlayer‐film porosity, and a quantitative assessment of hot electron emission through holes in Au overlayer films is obtained. The results indicate that preferential electron emission through holes in pure Au films is not of significance over the entire range of Au film thicknesses studied; this conclusion is substantiated by results obtained with composite Al‐Au‐overlayer films.
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