Yang Cheng-Fu, Wang Chih-Hsuan, Ke Pei-Xiu, Meen Teen-Hang, Lai Kuei-Kuei
Department of Chemical and Materials Engineering, National University of Kaohsiung, Kaohsiung 811, Taiwan.
Department of Aeronautical Engineering, Chaoyang University of Technology, Taichung 413, Taiwan.
Nanomaterials (Basel). 2024 May 25;14(11):930. doi: 10.3390/nano14110930.
The objective of this study is to create a planar solar light absorber that exhibits exceptional absorption characteristics spanning from visible light to infrared across an ultra-wide spectral range. The eight layered structures of the absorber, from top to bottom, consisted of AlO, Ti, AlO, Ti, AlO, Ni, AlO, and Al. The COMSOL Multiphysics simulation software (version 6.0) was utilized to construct the absorber model and perform simulation analyses. The first significant finding of this study is that as compared to absorbers featuring seven-layered structures (excluding the top AlO layer) or using TiO or SiO layers as substituted for AlO layer, the presence of the top AlO layer demonstrated superior anti-reflection properties. Another noteworthy finding was that the top AlO layer provided better impedance matching compared to scenarios where it was absent or replaced with TiO or SiO layers, enhancing the absorber's overall efficiency. Consequently, across the ultra-wideband spectrum spanning 350 to 1970 nm, the average absorptivity reached an impressive 96.76%. One significant novelty of this study was the utilization of various top-layer materials to assess the absorption and reflection spectra, along with the optical-impedance-matching properties of the designed absorber. Another notable contribution was the successful implementation of evaporation techniques for depositing and manufacturing this optimized absorber. A further innovation involved the use of transmission electron microscopy to observe the thickness of each deposition layer. Subsequently, the simulated and calculated absorption spectra of solar energy across the AM1.5 spectrum for both the designed and fabricated absorbers were compared, demonstrating a match between the measured and simulated results.
本研究的目的是创建一种平面太阳能光吸收器，该吸收器在超宽光谱范围内展现出从可见光到红外光的卓越吸收特性。吸收器的八层结构，从上到下依次为AlO、Ti、AlO、Ti、AlO、Ni、AlO和Al。利用COMSOL Multiphysics模拟软件（版本6.0）构建吸收器模型并进行模拟分析。本研究的第一个重要发现是，与具有七层结构（不包括顶部AlO层）或使用TiO或SiO层替代AlO层的吸收器相比，顶部AlO层具有卓越的抗反射性能。另一个值得注意的发现是，与顶部AlO层不存在或被TiO或SiO层替代的情况相比，顶部AlO层提供了更好的阻抗匹配，提高了吸收器的整体效率。因此，在350至1970 nm的超宽带光谱范围内，平均吸收率达到了令人印象深刻的96.76%。本研究的一个重要创新点是利用各种顶层材料来评估吸收和反射光谱，以及所设计吸收器的光学阻抗匹配特性。另一个显著贡献是成功实施了蒸发技术来沉积和制造这种优化的吸收器。进一步的创新涉及使用透射电子显微镜观察每个沉积层的厚度。随后，比较了设计和制造的吸收器在AM1.5光谱上的太阳能模拟和计算吸收光谱，结果表明测量结果与模拟结果相匹配。
