A simple one-speed solution to the Boltzmann equation is used to evaluate the mobility and diffusion coefficient for carriers in forward-biased semiconductor barriers. The analysis shows that although the average kinetic energy of carriers remains near thermal equilibrium, the mobility and diffusion coefficient are strongly reduced by the built-in field. Conventional macroscopic transport equations, which treat the carrier mobility and diffusion coefficient as single valued functions of the kinetic energy will improperly treat transport in forward-biased barriers. The results are important for the careful analysis of metal-semiconductor and heterojunction diodes.© 1995 American Institute of Physics.
Date of this Version
Lundstrom, M., & Tanaka, S. I. (1995). On the carrier mobility in forward-biased semiconductor barriers. Applied Physics Letters, 962. DOI: 10.1063/1.113611
Copyright (1995) American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in and may be found at http://dx.doi.org/10.1063/1.113611. The following article has been submitted to/accepted by Applied Physics Letters. Copyright (1995) Lundstrom, M., & Tanaka, S. I. This article is distributed under a Creative Commons Attribution 3.0 Unported License.