# Copyright 2013 DEVSIM LLC
#
# SPDX-License-Identifier: Apache-2.0

# material parameter value unit description
# constants = (
#    ("global", "Permittivity",    8.85418782e-14, "F/cm^2", "Permittivity of Free Space"),
#    ("SiO2",   "epsr",            3.9,            "",       "Relative Permittivity"),
#    ("global", "ElectronCharge",  1.60217646e-19, "coul",   "Charge of electrons")
#    ("Si",     "epsr",           11.7,            "",       "Relative Permittivity"),
#    ("Si",     "NC300",           3.23e19,        "#/cm^3", "Conduction band DOS at 300K"),
#    ("Si",     "NV300",           1.83e19,        "#/cm^3", "Valence band DOS at 300K"),
#    ("Si",     "EG300",           1.12,           "eV",     "Energy gap at 300K"),
#    ("Si",     "EG_ALPHA",        0.0,            "",       "Temperature dependence of Energy gap model"),
#    ("Si",     "EG_BETA",         0.0,            "",       "Temperature dependence of Energy gap model"),
# )
#
#####
##### These will become part of package
#####
##### Need relation between EF and Potential
#
# Eta_C = "(EF - EC)/(k * T)"
# Eta_V = "(EV - EF)/(k * T)"
#
#
##### EG MODEL from Wikipedia
# EG(T) = EG(0) - (EG_ALPHA * T^2)/(T + EG_BETA)
# ni(T) = (NC * NV)^0.5 * exp(-EG/(2 * k * T))