中国物理B ›› 2021, Vol. 30 ›› Issue (8): 84206-084206.doi: 10.1088/1674-1056/ac0696

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Solar energy full-spectrum perfect absorption and efficient photo-thermal generation

Zhefu Liao(廖喆夫), Zhengqi Liu(刘正奇)†, Qizhao Wu(吴起兆), Xiaoshan Liu(刘晓山), Xuefeng Zhan(詹学峰), Gaorong Zeng(曾高荣), and Guiqiang Liu(刘桂强)‡   

  1. College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China
  • 收稿日期:2021-05-08 修回日期:2021-05-25 接受日期:2021-05-29 出版日期:2021-07-16 发布日期:2021-08-02
  • 通讯作者: Zhengqi Liu, Guiqiang Liu E-mail:zliu@jxnu.edu.cn;liugq@jxnu.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11804134 and 11464019) and the Natural Science Foundation of Jiangxi Province, China (Grant No. 20202BBEL53036).

Solar energy full-spectrum perfect absorption and efficient photo-thermal generation

Zhefu Liao(廖喆夫), Zhengqi Liu(刘正奇)†, Qizhao Wu(吴起兆), Xiaoshan Liu(刘晓山), Xuefeng Zhan(詹学峰), Gaorong Zeng(曾高荣), and Guiqiang Liu(刘桂强)‡   

  1. College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China
  • Received:2021-05-08 Revised:2021-05-25 Accepted:2021-05-29 Online:2021-07-16 Published:2021-08-02
  • Contact: Zhengqi Liu, Guiqiang Liu E-mail:zliu@jxnu.edu.cn;liugq@jxnu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11804134 and 11464019) and the Natural Science Foundation of Jiangxi Province, China (Grant No. 20202BBEL53036).

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摘要： Designing and manufacturing cost-effective absorbers that can cover the full-spectrum of solar irradiation is still critically important for solar harvesting. Utilizing control of the lightwave reflection and transmission, metamaterials realize high absorption over a relatively wide bandwidth. Here, a truncated circular cone metasurface (TCCM) composed of alternating multiple layers of titanium (Ti) and silicon dioxide (SiO2) is presented. Enabled by the synergetic of surface plasmon resonances and Fabry-Pérot resonances, the TCCM simultaneously achieves high absorptivity (exceed 90%), and absorption broadband covers almost the entire solar irradiation spectrum. In addition, the novel absorber exhibits great photo-thermal property. By exploiting the ultrahigh melting point of Ti and SiO2, high-efficiency solar irradiation absorption and heat release have been achieved at 700℃ when the solar concentration ratio is 500 (i.e., incident light intensity at 5×105 W/m2). It is worth noting that the photo-thermal efficiency is almost unchanged when the incident angle increases from 0° to 45°. The outstanding capacity for solar harvesting and light-to-heat reported in this paper suggests that TCCM has great potential in photothermal therapies, solar desalination, and radiative cooling, etc.

关键词: solar energy, photo-thermal generation, perfect absorption, plasmonic

Abstract: Designing and manufacturing cost-effective absorbers that can cover the full-spectrum of solar irradiation is still critically important for solar harvesting. Utilizing control of the lightwave reflection and transmission, metamaterials realize high absorption over a relatively wide bandwidth. Here, a truncated circular cone metasurface (TCCM) composed of alternating multiple layers of titanium (Ti) and silicon dioxide (SiO2) is presented. Enabled by the synergetic of surface plasmon resonances and Fabry-Pérot resonances, the TCCM simultaneously achieves high absorptivity (exceed 90%), and absorption broadband covers almost the entire solar irradiation spectrum. In addition, the novel absorber exhibits great photo-thermal property. By exploiting the ultrahigh melting point of Ti and SiO2, high-efficiency solar irradiation absorption and heat release have been achieved at 700℃ when the solar concentration ratio is 500 (i.e., incident light intensity at 5×105 W/m2). It is worth noting that the photo-thermal efficiency is almost unchanged when the incident angle increases from 0° to 45°. The outstanding capacity for solar harvesting and light-to-heat reported in this paper suggests that TCCM has great potential in photothermal therapies, solar desalination, and radiative cooling, etc.

Key words: solar energy, photo-thermal generation, perfect absorption, plasmonic

中图分类号:  (Wave propagation, transmission and absorption)

  • 42.25.Bs
42.60.Da (Resonators, cavities, amplifiers, arrays, and rings) 73.40.Rw (Metal-insulator-metal structures) 78.67.Pt (Multilayers; superlattices; photonic structures; metamaterials)