|
Photon Energy Systems has developed a process for making
thin (<50u) single crystal silicon photovoltaic devices.
1) All rear contact technology - Increases efficiency by 5-10%
over conventional front contact cells. Improved appearance with
all dark front surface.
2) No shading issues - Modules produce
partial power even when partially shaded with unique fine grain
architecture.
3) Bifacial cells - Power can
be collected from the rear side as well as the front - a typical white
commercial rooftop can add 15% to the total power output.
4) Voltage flexibility - Cells
within the submodule can be interconnected in a variety of ways,
from all parallel (for standard submodules) to serial parallel
combinations for high voltage applications.
NEW Silicon Tape Process
Photon Energy Systems has pioneered a completely new concept in
photovoltaics. The PES process extracts a 50u thin silicon tape - up to
2 meters long, with widths up to 78mm wide, of monocrystalline
silicon. This tape is then processed into submodules which can
range in any size from less than 1 cm2 to 200x200mm.
The cells within the submodule can be interconnected in a variety of
ways, from all parallel (for standard submodules) to serial parallel
combinations for high voltage applications.
These sub modules are then assembled, laminated and
framed into conventional solar panels.
Sub-module of thin (50u) silicon PV cells
with all rear contacts
Typical efficiency for Cz made cells - 13%
|
