MI 2020 Solutions FINAL

SECTION 02
RENEWABLE ENERGY
03
DEVELOPMENT OF
FABRICATION OF A
HIGHLY EFFICIENT
AND LARGE-
AREA PEROVSKITE
PHOTOVOLTAIC
MODULE USING A
PRINTING PROCESS
KOREA
CHALLENGE
The efficiency of perovskite solar
cells, which are price-competitive
and offer flexibility, translucency,
and lightness, needs to be
improved so they can compete
with silicon solar cells. Unlike
conventional silicon solar cells,
perovskite solar cells can be used
in the emerging window-type and
portable solar cell market.
INNOVATION
A research team at the Korea
Research Institute of Chemical
Technology has produced large
modules through a printing
process. It has successfully
fabricated high efficiency modules
with an efficiency level of over
15% (based on active areas) that
exhibit heat stability for 1,000
hours at 85°C, as well as excellent
performance after 50 heat cycles (-45°C
– 85°C). This makes these cells longer
lasting and more efficient than previous
generations.
ACTION
The project has broken the world record
for perovskite solar cell efficiency five
times and most recently achieved an
efficiency level of 22.7% on a unit cell in
October 2017. This efficiency level is on
par with those of conventional silicon
solar cells and higher than the 22.1%
and 22.6% maximum efficiency levels of
cadmium telluride (CdTe) in thin film solar
cells and copper indium gallium selenide
(CIGS) solar cells.
A 20.9% efficiency level was also
confirmed on a unit cell created as part
of the effort to secure enlargement
technology.
The team is currently working on
optimising the module production
process to minimise areas of loss and
make them longer lasting.
POTENTIAL
The research team applied highefficiency
technologies in producing
large modules through a printing process.
It is expected that applying roll-to-roll
processing, a production method that
allows for rapid mass production at low
cost, will revolutionise the dissemination
of solar cells in the future.
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