期刊
OPTICS AND LASER TECHNOLOGY
卷 150, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlastec.2022.108002
关键词
High absorption efficiency; High heat emission efficiency; Nano-disk array; Surface plasmon resonance
资金
- National Natural Sci-ence Foundation of China [11604311, 61705204, 21506257, 12074151]
- Scientific Research Fund of SiChuan Provincial Science and Technology Department [2020YJ0137, 2020YFG0467]
- Southwest University of Science and Technology Undergraduate Innovation and Entrepre-neurship Training Program Project [S202110619065]
- Undergraduate Innovation Fund Project Funding by Southwest University of Science and Technology [CX 21-008]
- Talent Training and Laboratory Open Innovation Project of SWUST Institute of Science [LX20210001]
- Major Special Projects of Science and Technology in Fujian Province [2021HZ021027]
- Funded by teaching reform project of College Physics Teaching Committee of the Ministry of Education [DJZW202034XN]
In this paper, an efficient and ultra-broadband solar absorber composed of a periodic nano-disk combination array on a TiO2 thin film is proposed. The absorber exhibits high absorption efficiency, broad absorption bandwidth, strong heat radiation intensity, and polarization independence, making it suitable for thermo-photovoltaics and other high-power optoelectronic applications.
Solar energy is a widely used clean energy source, and solar absorber with wider spectrum and higher efficiency is more ideal for various applications of solar energy. In this paper, an efficient and ultra-broadband solar absorber is proposed, which is composed of periodic nano-disk combination array on TiO2 thin film. In our work, we use FDTD solutions to simulated and calculated the field distribution, absorption spectrum and thermal radiation intensity of the structure to explore the physical mechanism of the resonator. Among them, the resonance between the polarization direction of the three-layer nano-disk and the plasmon resonance at the junction of TiN nano-disk and TiO2 have obtained the ultra-broadband high-efficiency absorption of the absorber. The absorption bandwidth (A > 90%) reaches 1869 nm (288.5 nm-2157.5 nm), the average absorption efficiency in this range is 96.56%, and the average absorption efficiency in the whole wave band (200-2600 nm) is 93.77%. In addition, the structure has extremely strong heat radiation intensity, with high emission efficiency of 92.83% at 1500 K. Furthermore, the solar absorber proposed by us is polarization independent. In Transverse Electric (TE) mode and Transverse Magnetic (TM) mode, the increase of incident angle causes slight spectral shift of absorption spectrum, and the maximum deviation of average absorption efficiency is 2.17%. Ultra-broad absorption band, high absorption efficiency, high radiation intensity and polarization independence make it competent for thermo-photovoltaics and other high-power optoelectronic, radiation energy and information collection processes.
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