Photonic Crystals In The Numerical Simulation Study Of The Application Of Solar Photovoltaic Cells

Photonic crystal is formed by different material arrange in period structure. Because of the periodic in the space, behave of light through the material is different from the homogeneous material.Recently, Si nanowires, nanoparticles and nanorods get a lot of concern because of their special photoelectric properties and photovoltaic applications. Si nanostructure can be used as the electrodes for polymer and electrochemical photovoltaic cells and building blocks in the other optical devices. Si nanostructure is regard as the promising candidate for solar energy harvest.The high optical absorption of solar spectrum is needed to obtain high efficiency of solar cell. In this paper, based on the research method of photonic crystal we have researched the optical absorption of Si nanowire arrays and nanoporous Si structures. The comparison of optical absorption in Si nanowire and nanoporous Si structures for photovoltaic。In chapter one, we basically introduce the concept of photonic crystal and the applications based on the property of photonic crystal. Photonic band gap is the most important property of photonic crystal. We can change the density of electromagnetic state by the use of the band gap or defect states of band gap structure. So that we can fabricate kinds of devices that have high perform.In chapter two, we introduced the basic theory of photonic crystal, the advantages and defects of different numeric simulation method were compared.In chapter three, we introduced the TMM method to the research of solar photovoltaic cell that based on the nanostructure. Simulated the effect of absorption with different filling ratios,wavelengths, and incidence angles.