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Madesmith

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理工英文a few percent是什麼意思
Aug 22nd 2013, 10:36

請問一下，在文獻看到以下的句子，請問最後的a few percent是什麼意思呢？是指效率多少？

Considerable interest exists for nanowire-based solar cells because oftheir potential to achieve high energy conversion efficiency at low cost.However, due to the large surface-to-volume ratio, nanowires have a highsurface recombination rate. This shortens the carrier lifetime by 4-5 orders ofmagnitude, resulting in the efficiency of nanowire solar cells usually only a few percent.


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    newhong

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