taucplot.jpg

Tauc 图是确定半导体光学带隙的一种方法。绘制吸收系数和光子能量乘积的平方根 -(aE)^0.5 - 与光子能量的关系图。曲线应该有一段直线。如果延伸到 x 轴,则该线的 x 截距给出了光学带隙。

来源: https: //ascg.msm.cam.ac.uk/characterization/uvvis.php

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