DuPont Microcircuit Materials (MCM) has
introduced ‘DuPont Solamet PV416’
photovoltaic metallization paste used to raise the efficiency of thin film
photovoltaic cells. The front-side silver paste material has the capability
to be processed at temperatures below 140°C, and is designed to provide
improved contact resistance, conductivity, adhesion and fine line resolution
when printed on Transparent Conductive Oxides (TCOs). The new paste has been
claimed to have boosted CIGS thin-film manufacturer, Midsummer AB’s
cell efficiencies by as much as 0.5%.
Improving thin film cell efficiencies, requires the ability to print fine lines
with a high aspect ratio for greater conductivity, while maintaining a
PV416 photovoltaic metallization paste can be processed at lower temperatures
than similar pastes used in crystalline silicon cells, and its special
chemistry provides essential performance characteristics such as high
conductivity, adhesion and line resolution. With improved printed
conductivity (10mOhm/sq@25micron), low contact resistance (3mOhm.cm2), and
improved line resolution (<100 micron), it is ideal for solar cells built
on thin film photovoltaic substrates whether flexible or stainless steel. It
offers excellent fine line printability with minimal flow-out on TCOs as well
as excellent electrical properties. It is particularly suited for use on CIGS
and other thin film PV technologies.
Designed for screen printing front-side
conductor in CIGS, a-Si and other thin film solar cells.
photovoltaic metallization paste has a silver-based polymer composition and
is designed to be screen printed in high volume applications. Depending on
the temperature tolerance of the cell and substrate it can be dried at
temperatures between 130°C and 180°C. Drying times can vary depending
on the efficiency of the drier. Longer drying times and higher drying
temperatures will improve the adhesion, resistivity and abrasion resistance.
April 2012 onwards.
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