Silicon heterojunction solar cell
Panasonic high efficiency solar cell is unique in structure.
The crystalline silicon substrate is sandwhiched by the ultra-thin layers of amorphous silicon.
This amorphous silicon layer reduces the electrons lost on the surface resulting in high efficiency.
Ultra-thin amorphas silicon layer
Electrodes
Bifacial cell design
Heterojunction solar cell has a bifacial structure.
The cell even utilize the sunlight reflected back from the rear side material.
Panasonic
Conventional
High performance at high temperature
Unlike conventional solar panels
that suffer a radical drop in power generation efficiency at elevated surface temperature,
HIT maintains high efficiency even at high temperature.
PV system output during one day
Stress-controlled tab connetion
Typical tab interconnecting process is a soldering [temperature 800℃],
but we believe the high thermal stress could degrade the reliability of cell in longrun.
By reviewing process and material from the scratch,
we created an original interconnecting process which only requires less than 1/3 of temperature to ensure highest level reliability.
Panasonic’s low temperature tabbing process
minimizes stresses on tab and keeps high durability against changes in temperature