Research Of Transitional Material And Its Application In PIN Solar Cells

Amorphous silicon solar cells have high efficiency and low stability,it's opposite to the microcrystalline silicon solar cells.The performance of intrinsic layer plays an important role in PIN solar cells.Amorphous/microcrystalline transitional material is fabricated on glass in PECVD system in this paper,and the influence of Silane concentration Sc and substrate temperature Ts to the material has been studied here.Then studied the efficiency and stability of the solar cells with the transitional material.Two series materials,with fixed gas pressure 133pa,glow discharge power 35w,totally gas flow 50sccm are fabricated and analysized with Raman Spectrum,absorption and transmission spectrum.The result is:growth rate,band gap and photosensitivity increases with Sc,while crystalline and grain size decreases with Sc.It's different for the temperature series,the optical band gap decreses with Ts,the grow rate,crystalline and grain size increase with the Ts until reaches the top point and then falls,The toppest Ts increases with Sc.Finally,solar cells are fabricated with the optimized transitional materials,the result is-open voltage 0.66V,short current density 6.23mA/cm~2,efficiency 4.13%,efficeency recession 5.08% after long time exposure.Compareed with the amorphous and microcrystalline silicon solar cells, transitional materials in PIN solar cells could improve amorphous silicon's stability and microcrystalline silicon's efficiency.