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Unipolar space-charge-limited current in solids with nonuniform spacial distribution of shallow traps

Nicolet, M-A. (1966) Unipolar space-charge-limited current in solids with nonuniform spacial distribution of shallow traps. Journal of Applied Physics, 37 (11). pp. 4224-4235. ISSN 0021-8979. doi:10.1063/1.1708004.

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Models and analyses of unipolar space-charge-limited current (sclc) in the presence of traps usually assume that the distribution of the traps is uniform in space. It is demonstrated here that this assumption can be a critical one. Simple models with shallow traps are analyzed in detail to establish the fact. Planar, cylindrical, and spherical geometries receive equal attention. The results show that traps in the bulk of the base outside of the immediate vicinity of the emitter are of little significance to the V–I characteristic. The origin of this effect is discussed. A simple approximate treatment is derived. The results imply that the dc characteristic alone is an ambiguous tool for characterizing traps and their physical origin. Included as a byproduct are complete solutions of the V–I characteristics of trap-free sclc in all five distinct cases of the planar, cylindrical, and spherical geometries. Results are given both analytically as well as graphically.

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Additional Information:©1966 The American Institute of Physics. Received 24 January 1966. M.H. Kryder and G.H. Parker have been helpful in collecting data for Tables I and II. The U.S. Naval Ordnance Test Station, Pasadena Annex, and the Jet Propulsion Laboratory supported the works in parts. The author acknowledges and thanks for this personal help and financial support.
Issue or Number:11
Record Number:CaltechAUTHORS:NICjap66
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:10945
Deposited By: Tony Diaz
Deposited On:20 Jun 2008
Last Modified:08 Nov 2021 21:12

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