原文：Unlike the traditional thin-film solar cells of silicon,copper indium gallium selenide(CIGS) or CdTe  perovskite thin film solar cells can be solution processed；an important factor as it means that if all the fabrication steps are conducted at low temperatures, the solar cells can be made on cheap and flexible plastics。
请问an important factor 和 it中间的as是什么用法？？


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