TRIPLE JUNCTION TECHNOLOGY
SolarFocus products absorb all the sunlight.
Utilizing triple junction amorphous silicon photovoltaic technology, SolarFocus
products capture the broad solar spectrum. This spectrum splitting capability is
the key to higher engergy output.
Absorbtion Spectrum
Absorbing the broad sun spectrum provides a high output also in not ideal conditions
such as morning / evening hours, cloudy skies, etc.
Triple Junction Sandwich
Triple junction solar cells are designed as a three- layer sandwich. The spectrum
splitting capability is the key to higher energy output.
- The top layer, which captures the blue photons, uses a-Si with an optical gap of
~ 1.8eV for the intrinsic (i) layer.
- The middle layer is an amorphous silicon-germanium (a-SiGe) alloy with about 10-15%
Ge. The optical gap is ~1.6eV, which is ideally suited for absorbing the green photons.
- The bottom layer captures the red and infrared photons and uses an i layer of a-SiGe
alloy with about 40-50% Ge, corresponding to an optical gap of ~1.4eV.
- Light rays not absorbed during the entry would be reflected from the silver/zinc
oxide (Ag/ZnO) layer and be absorbed on the way out.
HIGH PERFORMANCE
SolarFocus products consider all the environmental factors and offer more performance
and customer values
Power Output Curves
SolarFocus products consider all environmental factors.
- All data specified after stabilisation, therefore 10-20% more initial performance.
- No degradation.
- Expected life time: 15 years.
- High output at low sun radiation, e.g. cloudy skies.
- High output in morning / evening hours.
Power Output
SolarFocus products consider all environmental factors.
Triple junction technology is more superior than Crystalline because it works better
at less ideal environmental conditions. In addition, it functions well under the
usual sun radiation (<700W/m² ) and under the cell temperature when reaching 60°C
- 80°C
Comparison at Outdoor Conditions
SolarFocus products consider offer more performance and customer value.
Even though the laboratory efficiency of SolarFocus products is low (Fig.2), the
measured output is the highest of all modules in test (Fig.1)