def simple_mesh(meshname='default_mesh', region='default_region', material='Si',
top='top', bottom='bottom', thickness=10, spacing=0.1):
"""
Creates a simple 1D mesh made of Si with metal contacts
:param meshname:
:param region:
:param material:
:param top:
:param bottom:
:param thickness: in nm, specify the thickness of the resistor
:param spacing:
:return:
"""
thickness = thickness * 1E-4
spacing = spacing * 1E-4 # convert nm to cm
ds.create_1d_mesh(mesh=meshname)
ds.add_1d_mesh_line(mesh=meshname, pos=0, ps=spacing, tag=top)
ds.add_1d_mesh_line(mesh=meshname, pos=thickness, ps=spacing, tag=bottom)
ds.add_1d_region(mesh=meshname, tag1=top, tag2=bottom, region=region, material=material)
ds.add_1d_contact(material='metal', mesh=meshname, name=f"{top}_contact", tag=top)
ds.add_1d_contact(material='metal', mesh=meshname, name=f"{bottom}_contact", tag=bottom)
ds.finalize_mesh(mesh=meshname)
return meshname, region, top, bottom
def CreateMesh2(device, region):
create_1d_mesh(mesh="dio")
add_1d_mesh_line(mesh="dio", pos=0, ps=1e-7, tag="top")
add_1d_mesh_line(mesh="dio", pos=0.5e-5, ps=1e-8, tag="mid")
add_1d_mesh_line(mesh="dio", pos=1e-5, ps=1e-7, tag="bot")
add_1d_contact(mesh="dio", name="top", tag="top", material="metal")
add_1d_contact(mesh="dio", name="bot", tag="bot", material="metal")
add_1d_region(mesh="dio",
material="Si",
region=region,
tag1="top",
tag2="bot")
finalize_mesh(mesh="dio")
create_device(mesh="dio", device=device)
def p_n_junction(meshname='default_mesh', region1='p_region', region2='n_region', material1='CdS', material2='CdTe', thickness1=0.2, thickness2=2, spacing=0.05, top='top', interface='interface', bottom='bottom'):
thickness1 = thickness1 * 1E-4
thickness2 = thickness2 * 1E-4
spacing = spacing * 1E-4 # convert nm to cm
ds.create_1d_mesh(mesh=meshname)
ds.add_1d_mesh_line(mesh=meshname, pos=0, ps=spacing/10, tag=top)
ds.add_1d_mesh_line(mesh=meshname, pos=thickness1, ps=spacing/50, tag=interface)
ds.add_1d_region(mesh=meshname, tag1=top, tag2=interface, region=region1, material='Si')
ds.add_1d_mesh_line(mesh=meshname, pos=thickness1+thickness2, ps=spacing, tag=bottom)
ds.add_1d_region(mesh=meshname, tag1=interface, tag2=bottom, region=region2, material='InAs')
ds.add_1d_contact(material='metal', mesh=meshname, name=f"{top}_contact", tag=top)
ds.add_1d_contact(material='metal', mesh=meshname, name=f"{bottom}_contact", tag=bottom)
ds.add_1d_interface(mesh=meshname, tag=interface, name=interface)
ds.finalize_mesh(mesh=meshname)
return meshname
def CreateMesh(device, region, meshname='diode'):
'''
Meshing
'''
create_1d_mesh(mesh=meshname)
add_1d_mesh_line(mesh=meshname, pos=0, ps=1e-7, tag="top")
add_1d_mesh_line(mesh=meshname, pos=0.5e-5, ps=1e-9, tag="mid")
add_1d_mesh_line(mesh=meshname, pos=1e-5, ps=1e-7, tag="bot")
add_1d_contact(mesh=meshname, name="top", tag="top", material="metal")
add_1d_contact(mesh=meshname, name="bot", tag="bot", material="metal")
add_1d_region(mesh=meshname,
material="Si",
region=region,
tag1="top",
tag2="bot")
finalize_mesh(mesh=meshname)
create_device(mesh=meshname, device=device)
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.mesh = create_1d_mesh(mesh=self.name)
CdS_params = {
'permittivity': 10,
'electron_affinity': 4.0,
'band_gap': 2.4,
'N_cond': 2.2E18,
'N_val': 1.8E19,
'mobility_n': 25,
'mobility_p': 100,
'p_doping': 0,
'n_doping': 1.1E18
}
# Devsim requires you create the entire mesh first include interfaces before specifying regions
# Create mesh
ds.create_1d_mesh(mesh=meshname)
# n1
top_tag = f"top_{CdS_region}"
interface_tag = f"bot_{CdS_region}"
bottom_tag = f"bot_{CdTe_region}"
ds.add_1d_mesh_line(mesh=meshname, pos=0, ps=spacing, tag=top_tag)
# add_1d_mesh_line(mesh=meshname, pos=n1_thick/2, ps=spacing, tag="mid_n1")
ds.add_1d_mesh_line(mesh=meshname,
pos=CdS_thickness,
ps=spacing,
tag=interface_tag)
ds.add_1d_region(mesh=meshname,
material="CdS",
region=CdS_region,
tag1=top_tag,
tag2=interface_tag)
CreateSiliconDriftDiffusion(device, region)
for i in get_contact_list(device=device):
if circuit_contacts and i in circuit_contacts:
CreateSiliconDriftDiffusionAtContact(device, region, i, True)
else:
CreateSiliconDriftDiffusionAtContact(device, region, i)
#---- Start ----
device = "MyDevice"
region = "MyRegion"
# Make a mesh for this device and region
# CreateMesh(device=device, region=region)
meshname = 'diode'
create_1d_mesh(mesh=meshname)
add_1d_mesh_line(mesh=meshname, pos=0, ps=1e-7, tag="top")
add_1d_mesh_line(mesh=meshname, pos=0.5e-5, ps=1e-9, tag="mid")
add_1d_mesh_line(mesh=meshname, pos=1e-5, ps=1e-7, tag="bot")
add_1d_contact(mesh=meshname, name="top", tag="top", material="metal")
add_1d_contact(mesh=meshname, name="bot", tag="bot", material="metal")
add_1d_region(mesh=meshname,
material="Si",
region=region,
tag1="top",
tag2="bot")
finalize_mesh(mesh=meshname)
create_device(mesh=meshname, device=device)
SetSiliconParameters(device, region, 300)
set_parameter(device=device, region=region, name="taun", value=1e-8)
set_parameter(device=device, region=region, name="taup", value=1e-8)