From September 21 - 24, BASF
will be presenting its range of innovative products for the solar industry at
the European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC)
in Hamburg, Germany. The conference and exhibition, which is one of the most
important worldwide for the solar and photovoltaic sector, will be taking place
for the 24th time.
At BASF’s booth B6/39 in Hall B6 BASF experts will inform industry professionals
about the company’s comprehensive portfolio of products and services.
Apart from SELURISTM, a range of innovative chemical solutions for wafer processing,
they will present a new laser printing technology and the silver conductive
pastes specifically designed for it as well as COLO-FAST®, a UV-stable polyurethane
system for the frames of photovoltaic and solar panels.
SELURISTM – for greater efficiency in manufacturing and better
With the SelurisTM range of products, BASF offers customers an all-round solution
for cutting, etching, texturing and doping mono- and polycrystalline solar cells.
The special feature of SelurisTM is that, under this name, the company is bringing
together chemicals that are specifically geared to the solar cell manufacturing
process. Thus, for example, the purity levels are tailored for use in solar
Within the solar cell manufacturing process, BASF cutting fluids are used as
cooling and lubricating agents when the wafers are sawn from the high-purity
silicon blocks. Special etching and texturing chemicals eliminate the saw damage
and the “patterning” created on the wafer surfaces. High-purity
phosphorus oxychloride (POCl3) from a new production plant is used for subsequent
doping of the wafers.
In addition, the company is working on innovative, new chemical solutions to
optimize the production processes and increase the efficiency of solar cells,
which will mean greater profitability for customers. These solutions include,
for example, improved cutting fluids, with which wafers can be cut even more
quickly and thinner.
Lead-free metallization pastes – for better conductivity
In Hamburg, BASF will, for the first time, be presenting the contactless digital
laser transfer printing process developed by the company as well as the corresponding
lead-free pastes for the metallization of wafers/solar cells. This new process
for crystalline solar cells reduces the breakage rate during metallization and
enables customers to handle even thinner solar cells (below 180 µm). Further
advantages are the environment-friendly lead-free paste technology and a simplified
process with high throughput. Beyond that, the new silver conductive pastes
are also suitable for use in conventional wafer production (screen printing
COLO-FAST® - more design freedom in just one step
With the new COLO-Fast® polyurethane casting system, BASF’s subsidiary
Elastogran offers quick, economical and secure framing of photovoltaic and solar
panels. The UV-stable PU system is able to replace the aluminum frames normally
used in the past and opens up a variety of frame design opportunities for customers:
the PU casting system is poured directly onto the solar cells. Production is
by way of the process known as reaction injection molding (RIM process). Here,
the solar cells and solar panels are placed into a closed mold and COLO-FAST®
is injected through a mixing head. After a reaction time of just 30 seconds
the framed panel can be removed and used immediately.
Apart from the greater design freedom for solar and photovoltaic modules, COLO-FAST®
provides faster production times, better edge protection, extreme resistance
to weathering and high UV resistance. Consequently, very flexible shapes can
be cast, different shades of color achieved and – according to the customer’s
particular requirements – light, thinner or thicker frames produced.