Starting from the structural characteristics of amorphous alloys, the reasons why they can be used as low-efficiency, long-life catalysts in low-temperature fuel cells are analyzed. The circuit current density changes with the concentration of silane. The thickness and short-circuit current density of the battery change regularly with the silane concentration, that is, the short-circuit current density and thickness change in direct proportion within a certain range. Although this series of batteries correspond to different silane concentration series, they are all microcrystalline silicon batteries. The specific solar energy journal gives specific changes of thickness and short-circuit current density.
The change of the short-circuit current density with the concentration of silane and the change of thickness with the concentration of silane are to deepen the understanding of the structure of the microcrystalline silicon battery, and test and study the dark state IV characteristics. It means that the performance of the battery is now limited by the corresponding doped layer, pi and in interface. In addition, the reverse saturation current density of the given battery is very small. It is precisely because of the relatively low reverse saturation current density and a certain quality factor that the open circuit voltage of the prepared battery is between 050V and 055V. At present, the maximum open-circuit voltage of high-efficiency microcrystalline silicon cells is based on the above analysis. We further optimized the doped layer. IV test results of the battery. It can be seen from the figure that a microcrystalline silicon battery with a short-circuit current density of 217mAcm2, an open-circuit voltage of 052V, a fill factor of 65%, and an efficiency of 73% is prepared. The back electrode only evaporates aluminum, there is no light trapping effect of other back electrodes such as ZnO, and the thickness of the active I layer is only 10m, which is the highest record of single junction microcrystalline silicon batteries in China.
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