TY - JOUR
T1 - An energy transport model for HBTs using energy- and composition-dependent transport parameters
AU - Horio, Kazushige
AU - Nakatani, Akio
PY - 1994/4/1
Y1 - 1994/4/1
N2 - In this paper, we describe an energy transport simulation method for graded AlGaAs/GaAs HBTs, which uses Al composition-, doping density-, and energy-dependent transport parameters estimated by a Monte Carlo method. For several representative Al composition x and doping densities, parameters such as electron mobility, energy relaxation time and upper valley fraction are evaluated as a function of electron energy. For the other x, these are determined by linear extraporation. The problem of this extraporation method is also described. Calculated cutoff frequency characteristics and electron velocity profiles are compared with those by using more simplified approaches, indicating the importance of using adequate transport parameters.
AB - In this paper, we describe an energy transport simulation method for graded AlGaAs/GaAs HBTs, which uses Al composition-, doping density-, and energy-dependent transport parameters estimated by a Monte Carlo method. For several representative Al composition x and doping densities, parameters such as electron mobility, energy relaxation time and upper valley fraction are evaluated as a function of electron energy. For the other x, these are determined by linear extraporation. The problem of this extraporation method is also described. Calculated cutoff frequency characteristics and electron velocity profiles are compared with those by using more simplified approaches, indicating the importance of using adequate transport parameters.
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U2 - 10.1108/eb051876
DO - 10.1108/eb051876
M3 - Article
AN - SCOPUS:84951547000
SN - 0332-1649
VL - 13
SP - 567
EP - 577
JO - COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering
JF - COMPEL - The International Journal for Computation and Mathematics in Electrical and Electronic Engineering
IS - 4
ER -