A novel selective thermophotovoltaic emitter based on multipole resonances
A novel selective thermophotovoltaic emitter based on multipole resonances
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一种基于多极共振的新型选择性热光伏发射器
DOI：
10.1016/j.ijheatmasstransfer.2021.122039
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发表时间：
2022-01
影响因子：
5.2
通讯作者：
Zhao C.Y.
中科院分区：
文献类型：
--
作者：
Huang T.C.;Wang B.X.;Zhao C.Y.
热光伏系统可以从热源获取电能，由于精心设计的热发射器的选择性发射，潜在效率超过了Shockley-Queisser限制。在这项工作中，提出了一种二维纳米盘/薄膜超材料作为波长选择性发射体，它可以很好地与热光伏系统中的光伏电池配合。与传统的基于表面等离子体激元的发射体相比，该发射体的发射峰是由硅纳米盘中的电偶极模和负极模激发实现的，由于介质材料的非色散光学常数，这一点很容易定制。同时，还研究了极化和极角对发射谱的影响，结果表明，该发射器不仅在垂直方向上具有较高的发射率，而且在大斜角时也具有较高的发射效率。电磁场和电流密度分布表明，多极共振与底层钨层之间的耦合可以引起磁偶极共振。因此，这两个发射峰的波长对平行于入射电场的周期是敏感的。此外，极点感应模式可以与晶格共振耦合，从而产生更高的发射率。此外，成功地制作了该发射器，测量的光谱与理论结果吻合较好。这里所获得的基本认识和见解将有助于积极设计和应用新型多极发射器来增强能量转换。
Thermophotovoltaic systems can harvest electric energy from heat sources with a potential efficiency exceeding the Shockley–Queisser limit due to the selective emission of an elaborate thermal emitter. In this work, a two-dimensional nanodisks/thin-film metamaterial is proposed as a wavelength-selective emitter, which can coordinate well with the photovoltaic cell in a thermophotovoltaic system. Compared to conventional emitters based on surface plasmon polaritons, the emittance peaks of the proposed emitter are realized by the excitations of both electric dipole and anapole modes in silicon nanodisks, which can be easily tailored due to the non-dispersive optical constants of dielectric materials. Meanwhile, the effect of polarization and polar angle on the emittance spectra is also investigated, suggesting that the proposed emitter has high emittance and efficiency not only in the normal direction but also at large oblique angles. Electromagnetic field and current density distributions reveal that the coupling between multipole resonances and the bottom tungsten layer can induce a magnetic dipolar resonance. Therefore, the wavelengths of both emittance peaks are sensitive to the period paralleled to the incident electric field. Besides, the anapole-induced mode can couple with the lattice resonance, resulting in higher emittance. Moreover, the proposed emitter is successfully fabricated, and the measured spectra agree well with the theoretical results. The fundamental understanding and insights obtained here will facilitate the active design and application of novel multipole-based emitters in enhancing energy conversion.
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影响因子：
3.7
作者：
V. Teofilo;P. Choong;J. Chang;Y. Tseng;S. Ermer
通讯作者：
V. Teofilo;P. Choong;J. Chang;Y. Tseng;S. Ermer
机器学习设计的非周期多层结构选择性热光伏发射器
影响因子：
6.4
作者：
Zhang Wenbin;Wang Boxiang;Zhao Changying
通讯作者：
Zhao Changying
影响因子：
3.8
作者：
Ghanekar, Alok;Lin, Laura;Zheng, Yi
通讯作者：
Zheng, Yi
DOI：
10.1016/s1386-9477(02)00653-7
发表时间：
2003-03
影响因子：
3.3
作者：
G. Palfinger;B. Bitnar;H. Sigg;E. Müller;S. Stutz;D. Grützmacher
通讯作者：
G. Palfinger;B. Bitnar;H. Sigg;E. Müller;S. Stutz;D. Grützmacher
影响因子：
1.9
作者：
Bett, AW;Sulima, OV
通讯作者：
Sulima, OV