搜搜考试网英语翻译The closer an energy level is situated to the middle of
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英语翻译
The closer an energy level is situated to the middle of the gap the higher its efficiency as a recombination center.In addition,its atomic properties are influential.They can be characterized by its capture cross sections for electrons and holes.The quality of a semiconductor material is expressed by the lifetime τ for minority carriers.Obviously,good material has a long lifetime.For solar cells,even more important is the diffusion length L,which is derived from lifetime.It is the distance an excess carrier can move by diffusion before being annihilated by recombination.Only light absorbed within a distance of about the diffusion length from the p-n junction can contribute to the electrical
output.High efficiency cells must have a diffusion length larger than the cell thickness.
The closer an energy level is situated to the middle of the gap the higher its efficiency as a recombination center.In addition,its atomic properties are influential.They can be characterized by its capture cross sections for electrons and holes.The quality of a semiconductor material is expressed by the lifetime τ for minority carriers.Obviously,good material has a long lifetime.For solar cells,even more important is the diffusion length L,which is derived from lifetime.It is the distance an excess carrier can move by diffusion before being annihilated by recombination.Only light absorbed within a distance of about the diffusion length from the p-n junction can contribute to the electrical
output.High efficiency cells must have a diffusion length larger than the cell thickness.
更密切的一个能级位于中东的差距更高的效率,重组中心.此外,它的原子属性是有影响的.他们可以通过其捕获截面电子和空穴.质量的半导体材料所表达的是一生τ为少数运营商.显然,
良好的材料有很长的寿命.太阳能电池,更重要的是传播长度L ,这是来自寿命.这是距离超出承运人可以将扩散前被消灭的重组.只有吸收光线的距离内的扩散长度从PN结能有助于电气
输出.高效率细胞必须有一个扩散长度大于细胞厚度.
良好的材料有很长的寿命.太阳能电池,更重要的是传播长度L ,这是来自寿命.这是距离超出承运人可以将扩散前被消灭的重组.只有吸收光线的距离内的扩散长度从PN结能有助于电气
输出.高效率细胞必须有一个扩散长度大于细胞厚度.
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