Multi Junction Solar Cell Diagram

Schottky junction solar cell wikipedia.

Multi junction solar cell diagram.

A solar cell is basically a junction diode although its construction it is little bit different from conventional p n junction diodes a very thin layer of p type semiconductor is grown on a relatively thicker n type semiconductor we then apply a few finer electrodes on the top of the p type semiconductor layer. In practice this means that there are multiple layers of different semiconductor materials each of which produces electric currents in response to different wavelengths of light. Though the cost of multi junction solar cells is roughly 100 times that of conventional silicon cells of the same area the small cell area employed makes the relative costs of cells in each system comparable and the system economics favor the multi junction cells. At present the fresnel lens are commonly used as the condenser in high concentrating photovoltaic hcpv modules.

Multi junction mj solar cells are solar cells with multiple p n junctions made of different semiconductor materials each material s p n junction will produce electric current in response to different wavelengths of light the use of multiple semiconducting materials allows the absorbance of a broader range of wavelengths improving the cell s sunlight to electrical energy conversion efficiency. Multi junction cell efficiency has now reached 44 in production cells. The maximum theoretical efficiency that a single bandgap solar cell can achieve with non concentrated sunlight is about 33 5 primarily because of. High efficiency multijunction devices use multiple bandgaps or junctions that are tuned to absorb a specific region of the solar spectrum to create solar cells having record efficiencies over 45.

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