TFET(Basic structure)

 silvaco code:-

go atlas

mesh space.mult=0.01

#

x.mesh loc=0 spac=.005

x.mesh loc=.001 spac=.0005

x.mesh loc=.01 spac=.005

x.mesh loc=.03 spac=.005

x.mesh loc=.039 spac=.0005

x.mesh loc=.040 spac=.005

#

y.mesh loc=0 spac=.00005

y.mesh loc=.001 spac=.0005

y.mesh loc=.003 spac=.0005

y.mesh loc=.013 spac=.0005

y.mesh loc=.015 spac=.0005

y.mesh loc=.016 spac=.00005

# region

region num=1 material=air x.min=0 y.min=0

region num=2 material=silicon x.min=0.001 x.max=.01 y.min=.003 y.max=.013

region num=3 material=silicon x.min=.01 x.max=.03 y.min=.003 y.max=.013

region num=4 material=silicon x.min=.03 x.max=.039 y.min=.003 y.max=.013

region num=5 material=HfO2 x.min=0.01 x.max=.03 y.min=.001 y.max=.003

region num=6 material=HfO2 x.min=0.01 x.max=.03 y.min=.013 y.max=.015

#

qtx.mesh loc=0.002 spac=0.001

qtx.mesh loc=0.01 spac=0.0005

qtx.mesh loc=0.024 spac=0.0005

qtx.mesh loc=0.03 spac=0.0005

qtx.mesh loc=0.035 spac=0.001

qty.mesh loc=0.00 spac=0.0005

qty.mesh loc=0.0022 spac=0.0005

qty.mesh loc=0.003 spac=0.0005

qty.mesh loc=0.008 spac=0.0005

qty.mesh loc=0.012 spac=0.005

#electrode

electrode name=gate x.min=.01 x.max=.03 y.min=0 y.max=.001 mat=aluminium

electrode name=gate2 x.min=.01 x.max=.03 y.min=.015 y.max=.016 mat=aluminium

electrode name=drain x.min=0 x.max=0.001 y.min=0.003 y.max=0.013

electrode name=source x.min=.039 x.max=.04 y.min=0.003 y.max=0.013

#

MATERIAL MATERIAL=silicon me.tunnel=.44 mh.tunnel=.52 NC300=1e17 NV300=1e17

material material=hfo2 permittivity=22

#

doping uniform conc=1e20 reg=2

doping uniform conc=5e18 reg=4

#contact

contact name=gate workfun=4.5

contact name=gate2 workfun=4.5 common=gate

contact name=drain workfun=3.9

contact name=source workfun=5.93

save outf=tfet.str

tonyplot tfet.str

#model

models bbt.nonlocal bbt.forward bgn srh auger conmob fldmob cvt print

#

output val.band con.band qfn qfp e.field j.electron j.hole j.conduction j.total

#method

method newton autonr trap maxtrap=10

#solve

solve init

solve prev

solve vdrain=0.0

solve vdrain=0.01

solve vdrain=0.02

solve vdrain=0.03

solve vdrain=0.04

solve vdrain=0.05

log outf=tfet.log

solve name=gate vgate=0 vstep=0.05 vfinal=1.5

tonyplot tfet.log

quit

result:-