Department of Optics and Photonics, National Central University, Zhongli 32001, Taiwan.
Opt Lett. 2013 Sep 1;38(17):3257-60. doi: 10.1364/OL.38.003257.
The mismatch in film thickness and incident angle between reflectance and transmittance extrema due to the presence of lossy film(s) is investigated toward the maximum transmittance design in the active region of solar cells. Using a planar air/lossy film/silicon double-interface geometry illustrates important and quite opposite mismatch behaviors associated with TE and TM waves. In a typical thin-film CIGS solar cell, mismatches contributed by TM waves in general dominate. The angular mismatch is at least 10° in about 37%-53% of the spectrum, depending on the thickness combination of all lossy interlayers. The largest thickness mismatch of a specific interlayer generally increases with the thickness of the layer itself. Antireflection coating designs for solar cells should therefore be optimized in terms of the maximum transmittance into the active region, even if the corresponding reflectance is not at its minimum.
针对太阳能电池有源区的最大透过率设计，研究了由于存在有损耗膜而导致反射率和透过率极值的膜厚和入射角失配。使用平面空气/有损耗膜/硅双界面几何形状说明了与 TE 和 TM 波相关的重要且相当相反的失配行为。在典型的薄膜 CIGS 太阳能电池中，通常 TM 波引起的失配占主导地位。在光谱的约 37％至 53％范围内，角度失配至少为 10°，这取决于所有有损耗层的厚度组合。特定层的最大厚度失配通常随层本身的厚度而增加。因此，太阳能电池的抗反射涂层设计应根据进入有源区的最大透过率进行优化，即使相应的反射率不是最低的。
