  We investigate and evaluate the contribution of the ultraviolet radiation
spectrum on the temperature and efficiency of commercial crystalline
silicon-based photovoltaics (PVs) that operate outdoors. The investigation is
performed by employing a comprehensive thermal-electrical modeling approach
which takes into account all the major processes affected by the temperature
variation in the photovoltaic devices. We show that effectively reflecting the
ultraviolet radiation (i.e. up to a certain wavelength) results in a reduction
of the overall operation temperature and enhancement of the PV cell's
efficiency. In addition, blocking the high energy ultraviolet photons prolongs
the life time of the PV and its performance on the long term.
