Decorative
and flexible solar panels become part of interior design and the appearance of
objects
Technical Research Centre of Finland (VTT), Science Daily
VTT Technical Centre of Finland has developed and utilized a mass
production method based on printing technologies allowing the manufacturing of
decorative, organic solar panels.
Design freedom improves the range of
applications of the panels on the surfaces of interior and exterior building
spaces. VTT is also studying the feasibility of printing technology in the mass
production of solar panels made from inorganic perovskite materials.
The new mass production method enables to create interior design
elements from organic solar panels (OPV, organic photovoltaics) harvesting
energy from interior lighting or sunlight for various small devices and sensors
that gather information from the environment. The panels can, for example, be
placed on windows and walls and on machines, devices and advertisement
billboards. Until now, it has only been possible to pattern OPV panels into a
form of stripes.
The solar panel manufactured with VTT's gravure and screen
printing technologies is only around 0.2 mm thick, and includes the electrodes
and polymer layers where the light is collected. Furthermore, graphics can be
printed to improve its visual appearance.
VTT has proven the feasibility of the method in its own pilot
manufacturing unit, using commercially available materials. VTT is
commercialising this manufacturing technology with different operators, and is
actively seeking new final-stage appliers of the technology.
The research scientists have tested the feasibility of the
method by printing leaf-shaped photovoltaic cells. Active surface of a one leaf
is 0.0144 m2 and includes connections and a decorative part.
Two hundred OPV leaves make one square metre of active solar panel surface that
generates 3.2 amperes of electricity with 10.4 watts of power at Mediterranean
latitudes.
Flexible OPV cells
Organic solar panels are flexible and light, but their
efficiency is lower compared to conventional, rigid silicon-based solar panels.
The solar panels are manufactured with printing machines based on conventional
printing methods using the roll-to-roll method, which enables the rapid mass
production of the products: the printing machine can produce up to 100 metres
of layered film per minute. The manufacturing of the OPV cells is affordable;
the material consumption is low, and after use, the OPV panels can be recycled.
The market for organic photovoltaic cells is developing, with a
market breakthrough expected within three years. The operating life of panel is
few years which is enough for many applications.
VTT is developing roll-to-roll manufacturing methods for
inorganic perovskite solar panels
VTT is also currently examining how well the roll-to-roll
printing methods are suited to the manufacturing of inorganic solar panels made
from perovskite materials.
The first perovskite solar cells manufactured in the
laboratory using solution-based processes have been promising. The performance
of this solar cell is roughly five times better than that of an organic
photovoltaic cell, and the material costs can be even ten times lower.
Freely designed decorative organic solar panels are applicable
also in indoor use to harvest energy from indoor light. Production methods are
cost-effective and materials can be recycled after the use. New materials such
as perovskite can be printed with same methods and increase efficiency in
future.
Using energy of light in data transfer
VTT is also developing a method to utilize light in wireless
data transfer by using solar cells as data receivers. This will open new
application possibilities to utilize printable solar cells e.g. in IoT
(Internet of Things) type applications, in which the devices can also harvest
energy from the ambient light. The first results have been very promising.
Story Source:
The above story is based on materials provided by Technical Research Centre of Finland(VTT). Note: Materials may be
edited for content and length.
Cite This Page:
Technical Research Centre of Finland (VTT). "Decorative and
flexible solar panels become part of interior design and the appearance of
objects." Science Daily,
21 January 2015.
<www.sciencedaily.com/releases/2015/01/150121084534.htm>.
