Disadvantages of the Silicon : purification and preparation of ready substance to produce the cell are still expensive and fragile in the production process
The Operation of Solar Cell is the process to change the light energy to electricity directly. When the light, which is electromagnetic wave and has energy, hits on the semiconductor, there will the energy transfer to each other. Light energy will cause the movement of electrical current (Electron) inside semiconductor material. As a result, the electricity can be connected out to be used.
N-Type Silicon is at the front of cell, the doped semiconductor with Phosphorus, has the property as the Electron donor when receiving energy from the sun.
P-Type Slicon is the semiconductor material doped with Boron, resulting in material structure loss of Electron (Hole). When receiving energy from the sun light, it will serve as the Electron acceptor.
When taking 2 types of Silicon to connect together with P-Njunction, the result will become “Solar Cell” in the environment that still has no sun.
N-Type silicon, which is located in front of the cell, most components are ready to donate Electrons but still has some mixing little Holes. In front of N-Type side, there will be a layer of metal called Front Electrode, responsible to accept Electrons. For P-Type side which is located at the back of cell, main structures are Holes, but still has some mixing little Electrons. At the back of P-Type side, there will be a layer of metal called Back Electrode, responsible to gather Holes.