Photovoltaic Solar Cells
Monocrystalline silicon solar cells (single crystalline silicon photovoltaic cells) 125mm*125mm and monocrystalline solar cells 156mm*156mm from Hebe Solar. Multi crystalline silicon solar cells 6" and Polycrystalline silicon photovoltaic cells 5" from Hebe Solar.
Typical efficiency of commercially produced crystalline silicon solar cells lies in the range 13-1 6%.Because the efficiency of the cell influences the production cost at all production stages, substantial effort is directed towards efficiency improvement. The required future efficiency goals for industrial cells are 18-20% for monocrystalline and 16-18% for multicrystalline silicon. Based on laboratory scale achievements one can consider that production type cells able to fulfil the efficiency goal should will possess most of the following features(providing that they can be introduced in a cost effective way):
front surface texturing, optimised emitter surface concentration and doping profile, effective front surface passivation, photovoltaic solar cells fine line front electrode, front electrode passivation:
-deep and highly doped emitter under the contact, photovoltaic cells
-MIS contact, thin base, i.e. much smaller than the minority carrier diffusion length, back surface passivation:
-oxide and/or nitride passivation +local BSF(PERL)
-floating junction structure or back surface field, back electrode passivation:
-deep back-surface diffusion under the contact, back reflector, back surface texture. antireflection coating optimised for encapsdation.
The advance crystalline silicon solar cells producing technology from Hebe Solar.