By comparing the physical natures of the Adachi, Forouhi-Bloomer, and Tauc-Lorentz models, we propose a Tauc- Lorentz-Urbach (TLU) model with inclusion the Urbach tail.

• 结合该反射谱公式,我们比较了Adachi模型、Forouhi-Bloomer模型和Tauc-Lorentz模型的内在特点,并提出了一个包含Urbach带尾在内的Tauc-Lorentz-Urbach (TLU)模型。