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- Title
Screening and optimization of metal-insulator-metal selective emitter in thermophotovoltaic system.
- Authors
Ren, Kangming; Wang, Canglong; Liu, Jitao; Shu, Yafeng; Zhang, Haohao; Qi, Panli; Hong, Xueren; Liang, Qing-Qing
- Abstract
In thermophotovoltaic (TPV) systems, it is crucial that the selective emitters can tailor emission spectrum to match the bandgap of photovoltaic (PV) cells and largely enhance the system efficiency. In this work, a metamaterial emitter based on the metal-insulator-metal (MIM) structure is proposed to obtain the high energy conversion efficiencies. The geometric parameters of MIM emitter have been investigated to obtain an excellent radiation spectrum of emitter composed of W and HfO2. The excellent emission performance of MIM emitter is attributed to the excitation of surface plasmon polariton (SPP) and cavity resonance, and the structure of MIM emitter is insensitive for different polarization modes. The 21 material combinations of MIM emitters have been screened to obtain the optimal emitter matching GaSb and InGaAsSb cells. This work identifies the crucial role of structure and materials into the emitter of a TPV system. In the evaluation of MIM emitter and TPV System, when the operating temperature of emitter increases from 1400 K to 2000 K, the system efficiency of optimal W/HfO2/W MIM emitter increases from 20.26% to 30.41%, while the output electric power increases from 3.59 kW/m2 to 42.48 kW/m2. The phenomenon indicates that the MIM emitter with the optimal material combinations and geometric parameters can significantly improve the matching degree with GaSb and InGaAsSb cells. Our results will be helpful to expand the optimization scope of metamaterial emitters in TPV systems.
- Subjects
POLARITONS; ELECTROMAGNETIC spectrum; ELECTRIC power; MOLECULAR spectra; ENERGY conversion; FIELD emission
- Publication
Modern Physics Letters B, 2024, Vol 38, Issue 19, p1
- ISSN
0217-9849
- Publication type
Article
- DOI
10.1142/S0217984924501458