After
the
solar
cell
is
fabricated,
electrical
contacts
-
which
are
made
from
metals
such
as
palladium/silver,
nickel
or
copper
that
are
vacuum-evaporated
through
a
light-sensitive
material
called
'photo-resist'
-
are
placed
to
connect
one
solar
cell
to
another
in
order
to
create
a
larger
module.
To
reduce
the
large
amount
of
sunlight
lost
to
reflection
off
the
silicon,
an
anti-reflective
coating
is
layered
on
top
of
the
silicon
wafers.
Most
commonly,
this
coating
is
made
of
titanium
dioxide
and
silicon
oxide,
which
is
either
heated
until
its
molecules
boil…
