The
Korean
group
says
the
new
standard,
verified
by
German
research
body
Fraunhofer
ISE,
was
set
using
conventional
156mm
commercial-grade
p-type
silicon
wafers.
Researchers
at
HHI
fine-tuned
existing
LDSE
(laser-doped
selective
emitter)
technology
to
create
the
new
solar
cell
with
copper
plating.
The
record-setting
copper-front-contact
selective-emitter
cell
has
a
full-area
aluminum-alloyed
back
electrode.
As
usual
with
LDSE
a
laser-based
selective
doping
process
is
combined
with
a
plating
technology,
but
to
form
copper
contacts
at
the
front
–
rather
than
traditional
silver
ones
–
thereby
cutting
the
cost
of
production
by
10-30%
compared
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