Next, wafers are moved in cartridges into long, cylindrical, ovenlike chambers in which phosphorus is diffused into a thin layer of the wafer surface. The molecular-level impregnation occurs as the wafer surface is exposed to phosphorus gas at a high heat, a step that gives the surface a negative potential electrical orientation. The combination of that layer and the boron-doped layer below creates a positive-negative, or P/N, junction – a critical partition in the functioning of a PV cell.
ws9876 wrote: »
silicone is coated with other elements to make a pn jct. are both sides of silicone doped or only one? explain...
ggunn wrote: »
One is a crystalline substance from which electrical devices are made, the other is what gives many pole dancers that extra jiggle.
jcheil wrote: »
I'm still not sure I understand. Perhaps if you posted a PICTURE of each (of the above) it would help to show the difference from a visual perspective
BB. wrote: »
Actually, they do make Bi-Facial solar panels (glass on both sides) solar panels. The P-N Junction itself is not (completely?) direction sensitive regarding light. I believe that the construction of the contacts used to harvest the electricity affects the ability to make cells bi-facial (contacts need to allow light through to underlying Silicon.http://www.pv-tech.org/news/spi_2013_panasonic_displays_special_order_double_bifacial_hit_module
Cariboocoot wrote: »
And this is one of the reasons panels aren't very efficient. If they could make that junction truly polarized it would improve things. Maybe someday.